Swift Operators: The Foundation of SwiftUI Logic
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Building powerful iOS apps through the language of operations

SwiftUI Fundamentals Handbook
1
Building Your iOS Development Foundation
2
Print Statements Debugging
18:04
3
Comments: Documentation Waypoints in Your SwiftUI Codebase
14:39
4
Variables and Constants
11:37
5
Strings and Interpolation
13:22
6
Swift Operators: The Foundation of SwiftUI Logic
7
Unary Operators
8
Binary Operators
9
Arithmetic Operators
10
If-Else and Comparison Operators
11
Logical Operators
12
Ternary Operators
13
Blocks and Scope
10:22
14
Swift Collections: Arrays, Sets, and Dictionaries Overview
15
Swift Arrays: The Basics Part 1
16
Swift Arrays: Best Practices in SwiftUI Part 2
1. Introduction to Swift Operators
Swift operators are the fundamental building blocks that power the logic and calculations in your iOS applications. These special symbols or phrases work on values to transform them or combine them in meaningful ways, producing new values that drive your app's functionality.
A. What Are Operators?
Operators are the essential tools that perform actions on your Swift values, allowing you to build everything from simple calculations to complex logical evaluations in your SwiftUI apps.
i. Definition and Purpose Operators in Swift are special symbols or phrases that transform, combine, or evaluate values. They take one or more inputs (called operands) and produce a new value. Think of operators as the verbs of programming - they perform actions on your data.
ii. Basic Structure
let result = a + b
In this simple expression, +
is the operator, while a
and b
are the operands. The operator processes these operands to create a new value which is then assigned to result
.
iii. Everyday Analogies Just as mathematical operations like addition and subtraction manipulate numbers in everyday life, Swift operators manipulate values in your code. They're the computational tools that let your app make decisions, calculate values, and transform data.
B. Importance in SwiftUI Development
In SwiftUI's declarative framework, operators play a crucial role in creating responsive, state-driven interfaces that adapt to user interactions and changing data.
i. Declarative UI Logic SwiftUI's declarative approach relies heavily on operators to determine what content should appear and how it should behave. Operators form the backbone of conditionals that control view presentation, enabling your UI to respond intelligently to state changes.
ii. State Management Operators are essential for evaluating and transforming state in SwiftUI applications. They determine when views should update, how data flows through your application, and how user inputs are processed.
iii. Data Transformation In SwiftUI, operators help transform raw data into display-ready formats, calculating derived values that power dynamic interfaces and visualizations.
C. Enabling Concise, Readable Code
Swift's expressive operator syntax allows you to write clear, maintainable code that communicates intent effectively while minimizing verbosity and complexity.
i. Expressive Shorthand Operators provide compact, expressive syntax that would otherwise require verbose function calls:
// Using operators
let canProceed = isLoggedIn && hasPermission
// Without operators
let canProceed = isLoggedIn.booleanAND(hasPermission)
ii. Familiar Patterns Many Swift operators use familiar symbols from mathematics and other programming languages, making code more intuitive and accessible to developers from diverse backgrounds.
iii. Chainable Operations Operators can be chained together to express complex logic in a natural, readable way:
let eligibleForDiscount = age >= 65 || isStudent || purchaseCount > 10
iv. SwiftUI-Specific Benefits In SwiftUI specifically, operators enable:
- Conditional view modifiers:
.padding(isSelected ? 20 : 10)
- Dynamic property calculations:
width * 0.8
- Compact state evaluations:
if isLoading || hasError
- Readable format transformations:
"Total: \(quantity * price)"
Understanding Swift operators isn't just about learning syntax—it's about gaining fluency in expressing the logic and calculations that make your SwiftUI applications dynamic, responsive, and intelligent. As we explore each operator type in the following sections, you'll build a comprehensive toolkit for crafting sophisticated, efficient iOS experiences.
2. Operator Classification by Number of Operands
Swift organizes its operators into clear categories based on how many values (operands) they work with. This fundamental classification helps you understand an operator's basic structure and usage pattern.
A. Unary Operators
Unary operators work with just one value, making them the simplest operator type in Swift. They either appear before their target (prefix) or after it (postfix) to modify or transform a single value.
i. Prefix Operators These operators appear before their operand and perform actions like negation, identity, or boolean inversion:
let isHidden = true
let isVisible = !isHidden // Boolean NOT operator inverts the value
let temperature = 25
let negativeTemp = -temperature // Negative prefix creates the opposite number: -25
ii. Postfix Operators These operators appear after their operand and are often used for unwrapping optionals or accessing specific behaviors:
let username: String? = "JohnDoe"
let unwrappedName = username! // Force unwraps the optional (use with caution)
let optionalValue: Int? = 42
if optionalValue != nil {
print("Has value") // The postfix ? is part of the optional type
}
B. Binary Operators
Binary operators work with two values, appearing between their operands. These are the most common operators in Swift, handling everything from mathematical calculations to comparisons.
// Arithmetic binary operators
let sum = 5 + 3 // Addition: 8
let difference = 10 - 4 // Subtraction: 6
// Comparison binary operators
let isEqual = (age == 18) // Equality check
let isGreater = (score >= 90) // Greater than or equal to
// Assignment binary operators
var total = 0
total += taxAmount // Add and assign
// Logical binary operators
let canAccess = isLoggedIn && hasPermission // AND operator
C. Ternary Operator
Swift has exactly one ternary operator - the conditional operator (?:). It works with three values to create a compact if-else expression, making it particularly valuable in SwiftUI for conditional view modifications.
// Basic syntax: condition ? valueIfTrue : valueIfFalse
// In a variable assignment
let status = isComplete ? "Done" : "In progress"
// In SwiftUI
Text(isSelected ? "Selected" : "Not Selected")
.foregroundColor(isSelected ? .green : .gray)
// For view selection
var body: some View {
isLoggedIn ?
AnyView(DashboardView()) :
AnyView(LoginView())
}
Understanding these operator categories provides the foundation for using Swift's rich set of operators effectively in your SwiftUI applications, enabling clear and concise code expressions.
3. Operator Classification by Function
While organizing operators by the number of operands provides structural clarity, grouping them by function reveals their practical purpose in your code. Swift offers specialized operators for different programming needs.
A. Arithmetic Operators
Arithmetic operators perform mathematical calculations on numeric values, forming the basis of computational logic in your apps.
let sum = 5 + 3 // Addition: 8
let difference = 10 - 7 // Subtraction: 3
let product = 4 * 6 // Multiplication: 24
let quotient = 20 / 4 // Division: 5
let remainder = 10 % 3 // Remainder: 1
B. Comparison Operators
Comparison operators evaluate relationships between values, always producing a Boolean result that can drive conditional logic.
let a = 10, b = 5
let isEqual = a == b // false
let isNotEqual = a != b // true
let isGreater = a > b // true
let isLess = a < b // false
let isGreaterOrEqual = a >= b // true
let isLessOrEqual = a <= b // false
C. Logical Operators
Logical operators combine Boolean values, allowing complex condition composition and control flow management.
let hasAccount = true
let isVerified = false
let isAdmin = true
let canAccess = hasAccount && isVerified // Logical AND: false
let canBypass = hasAccount || isAdmin // Logical OR: true
let isRestricted = !isAdmin // Logical NOT: false
D. Range Operators
Range operators create sequences of values, essential for iteration, collection slicing, and expressing numeric bounds.
// Closed range: includes both endpoints
for i in 1...5 {
print(i) // Prints 1, 2, 3, 4, 5
}
// Half-open range: excludes upper bound
for i in 0..<3 {
print(i) // Prints 0, 1, 2
}
// One-sided ranges
let numbers = [10, 20, 30, 40, 50]
let fromThree = numbers[3...] // [40, 50]
let upToThree = numbers[..<3] // [10, 20, 30]
E. Assignment Operators
Assignment operators set or modify values, often combining an operation with assignment for more concise code.
var score = 0 // Basic assignment
// Compound assignment operators
score += 10 // Add and assign: score = score + 10
score -= 5 // Subtract and assign: score = score - 5
score *= 2 // Multiply and assign: score = score * 2
score /= 4 // Divide and assign: score = score / 4
F. Bitwise Operators
Bitwise operators manipulate individual bits within integral types, useful for flags, masks, and low-level operations.
let bits1: UInt8 = 0b00101010
let bits2: UInt8 = 0b00001111
let bitwiseAND = bits1 & bits2 // 0b00001010 (both bits must be 1)
let bitwiseOR = bits1 | bits2 // 0b00101111 (either bit can be 1)
let bitwiseXOR = bits1 ^ bits2 // 0b00100101 (exactly one bit must be 1)
let bitwiseNOT = ~bits1 // 0b11010101 (flip all bits)
let leftShift = bits1 << 1 // 0b01010100 (shift left by 1)
let rightShift = bits1 >> 1 // 0b00010101 (shift right by 1)
G. Other Operators
Swift includes additional specialized operators that don't fit neatly into other categories but serve important roles.
// Nil-coalescing operator: provides default value for optionals
let inputName: String? = nil
let username = inputName ?? "Guest" // "Guest"
// Identity operators: check if two object references point to same instance
let viewA = UIView()
let viewB = viewA
let viewC = UIView()
let sameInstance = viewA === viewB // true
let differentInstance = viewA !== viewC // true
// Type check and cast operators
let value: Any = "Hello"
let isString = value is String // true
if let string = value as? String {
print(string.count) // 5
}
Understanding these functional categories gives you a comprehensive toolkit for expressing different types of operations in your Swift code, from simple calculations to complex logical evaluations.
4. Operator Precedence and Associativity
When expressions contain multiple operators, Swift needs rules to determine which operations happen first. These rules ensure calculations are predictable and consistent across your codebase.
A. How Swift Determines the Order of Operations
Swift follows a well-defined system of operator precedence and associativity that dictates the sequence of operations in complex expressions. Understanding these rules is essential for writing code that behaves as expected without relying on excessive parentheses.
B. Precedence Groups and Their Hierarchy
Swift organizes operators into precedence groups, arranged in a hierarchy from highest (evaluated first) to lowest (evaluated last):
i. Highest Precedence
- Default precedence (function calls, member access, subscripts)
- Unary operators (!, -, +, etc.)
- Multiplicative operators (*, /, %)
ii. Middle Precedence
- Additive operators (+, -)
- Range operators (..., ...<)
- Cast operators (is, as, as?, as!)
- Comparison operators (==, !=, <, <=, >, >=)
iii. Lower Precedence
- Logical conjunction (&&)
- Logical disjunction (||)
- Ternary conditional (?:)
- Assignment operators (=, +=, -=, etc.)
// Multiplication has higher precedence than addition
let result = 2 + 3 * 4 // 14, not 20
// Evaluated as: 2 + (3 * 4)
// Logical AND has higher precedence than logical OR
let condition = true || false && false // true, not false
// Evaluated as: true || (false && false)
C. Left vs. Right Associativity
When an expression contains multiple operators with the same precedence, associativity determines the evaluation order:
i. Left Associative Most binary operators are left associative, meaning they evaluate from left to right:
// Left associative: evaluated from left to right
let value = 8 - 3 - 2 // 3, not 7
// Evaluated as: (8 - 3) - 2 = 5 - 2 = 3
ii. Right Associative Assignment operators and the ternary operator are right associative, meaning they evaluate from right to left:
// Right associative assignment
let a, b, c: Int
a = b = c = 5 // Evaluated as: a = (b = (c = 5))
// Right associative ternary conditions
let result = condition1 ? value1 : condition2 ? value2 : value3
// Evaluated as: condition1 ? value1 : (condition2 ? value2 : value3)
D. Using Parentheses to Clarify Intent
Even when you understand precedence rules, using parentheses can make your code clearer and less prone to misinterpretation:
// Without parentheses (relies on precedence rules)
let result1 = 2 + 3 * 4 // 14
// With parentheses (explicitly shows intent)
let result2 = 2 + (3 * 4) // 14 (same result, but clearer intent)
let result3 = (2 + 3) * 4 // 20 (different result by changing precedence)
// For complex logical conditions, parentheses improve readability
if (isLoggedIn && hasPermission) || isAdmin {
// Code is clear about the primary logical groups
}
E. Real-World Example in SwiftUI
In SwiftUI, understanding operator precedence affects how conditions and calculations are evaluated in your views:
struct ContentView: View {
@State private var score = 85
@State private var isPremium = true
var body: some View {
VStack {
// Precedence affects this calculation
Text("Adjusted Score: \(score * 2 + (isPremium ? 10 : 0))")
// Operator precedence determines which view appears
if score > 70 && isPremium || score > 90 {
GoldBadgeView() // This evaluates as: (score > 70 && isPremium) || score > 90
} else {
SilverBadgeView()
}
}
}
}
Mastering operator precedence and associativity helps you write more concise code while maintaining clarity and predictability in your expressions.
5. Operator Overloading in Swift
One of Swift's most powerful features is the ability to extend existing operators to work with your custom types. This enables you to create intuitive, expressive code that maintains the natural semantics of mathematical and logical operations.
A. Extending Existing Operators for Custom Types
Operator overloading allows you to define how standard operators like +, -, *, / and others behave when applied to your custom types. This makes your code more readable by leveraging familiar symbols rather than custom method names.
B. Creating Intuitive Behaviors for Your Data Structures
When implemented thoughtfully, operator overloading makes your custom types feel like natural extensions of Swift's built-in types. Operations that conceptually align with existing operators become intuitive and require less documentation.
i. Implementation Pattern To overload an operator, define a global function using the operator as the function name, with parameters representing the operands:
// General pattern for binary operators
static func +(lhs: YourType, rhs: YourType) -> YourType {
// Implementation that combines two instances
return result
}
// General pattern for unary operators
static prefix func -(value: YourType) -> YourType {
// Implementation that transforms a single instance
return result
}
ii. Common Use Cases
- Mathematical operations for geometric types (Point, Size, Vector)
- Combining custom collections or sequences
- Boolean operations for custom flag or option types
- String and text manipulation
C. Vector Addition Example
A practical example of operator overloading is implementing vector addition for a custom 2D vector type:
struct Vector2D {
var x: Double
var y: Double
}
// Overload the + operator for vector addition
static func + (left: Vector2D, right: Vector2D) -> Vector2D {
return Vector2D(x: left.x + right.x, y: left.y + right.y)
}
// Overload the += operator for compound assignment
static func += (left: inout Vector2D, right: Vector2D) {
left = left + right
}
// Usage
let vectorA = Vector2D(x: 1.0, y: 3.0)
let vectorB = Vector2D(x: 2.0, y: 1.5)
let combined = vectorA + vectorB // Vector2D(x: 3.0, y: 4.5)
var position = Vector2D(x: 0, y: 0)
position += vectorA // position is now (1.0, 3.0)
D. Best Practices for Operator Overloading
i. Maintain Semantic Consistency When overloading operators, ensure the behavior matches the expected semantics:
+
should represent addition or combination-
should represent subtraction or negation*
should represent multiplication or scaling==
should test meaningful equality (not identity)
ii. Consider Performance Be mindful of the computational cost of overloaded operators, especially when they might be used in tight loops.
iii. Prefer Value Semantics Operator overloading works best with value types (structs) rather than reference types (classes).
iv. Document Carefully While good operator overloading should be intuitive, it's still important to document the exact behavior to avoid surprises.
Thoughtful operator overloading can significantly enhance the readability and expressiveness of your code, making complex operations more accessible and maintaining the natural flow of Swift's syntax.
6. Custom Operators
Beyond overloading existing operators, Swift allows you to define entirely new operators tailored to your application's specific needs. This powerful capability enables you to express domain-specific operations using concise, symbolic notation.
A. Creating Your Own Operators
Swift gives you the flexibility to define custom operators that don't exist in the standard library. These can use various symbolic characters to represent specialized operations relevant to your application domain.
i. Operator Declaration To create a custom operator, you must first declare it and specify whether it's a prefix, infix, or postfix operator:
// Declaring a new infix operator
infix operator **: MultiplicationPrecedence
// Declaring a prefix operator
prefix operator √
// Declaring a postfix operator
postfix operator °
ii. Implementation After declaration, you implement the operator as a global function:
// Implementing the exponentiation operator
func ** (base: Double, power: Double) -> Double {
return pow(base, power)
}
// Usage
let result = 2.0 ** 3.0 // 8.0 (2³)
B. When Custom Operators Improve Readability
Custom operators should be used judiciously, as they can either enhance or reduce code clarity depending on the context:
i. Appropriate Use Cases
- Mathematical or scientific notation (√, ∑, ∫, ⊕)
- Domain-specific symbols with standard meanings
- Operations that would otherwise require verbose function names
- When the symbol has an obvious, intuitive meaning in your domain
ii. When to Avoid
- For operations that are already clear with method calls
- When the meaning isn't immediately obvious
- If the operation is rarely used
- When working with teams unfamiliar with your custom operators
C. Example: Custom Exponential Operator
A practical example of a useful custom operator is a power/exponentiation operator, which has a standard mathematical notation that Swift doesn't include by default:
// Declaration - place in the global scope
infix operator **: MultiplicationPrecedence
// Implementation for Double
func ** (base: Double, power: Double) -> Double {
return pow(base, power)
}
// Implementation for Int
func ** (base: Int, power: Int) -> Int {
return Int(pow(Double(base), Double(power)))
}
// Usage examples
let squared = 5 ** 2 // 25
let cubed = 3 ** 3 // 27
let root = 16 ** 0.5 // 4.0 (square root)
// In SwiftUI context
struct PowerCalculationView: View {
@State private var base: Double = 2
@State private var exponent: Double = 3
var body: some View {
VStack {
Text("Base: \(base)")
Text("Exponent: \(exponent)")
Text("Result: \(base ** exponent)")
.font(.headline)
// UI controls for base and exponent
Slider(value: $base, in: 1...10)
Slider(value: $exponent, in: 1...5)
}
.padding()
}
}
D. Advanced Custom Operator Examples
i. Vector Cross Product
infix operator ⨯: MultiplicationPrecedence
func ⨯(left: Vector3D, right: Vector3D) -> Vector3D {
return Vector3D(
x: left.y * right.z - left.z * right.y,
y: left.z * right.x - left.x * right.z,
z: left.x * right.y - left.y * right.x
)
}
// Usage
let normal = vectorA ⨯ vectorB
ii. Option Composition
infix operator |>: AdditionPrecedence
func |>(left: Options, right: Options) -> Options {
return Options(rawValue: left.rawValue | right.rawValue)
}
// Usage
let settings = .allowEditing |> .showToolbar |> .autoSave
Custom operators, when used thoughtfully, can make your code more expressive and aligned with domain-specific concepts, creating clearer and more maintainable implementations of complex operations.
7. Best Practices
Working effectively with operators requires more than just technical knowledge—it demands good judgment about when and how to use them for maximum clarity. Following these best practices will help you write Swift code that's both expressive and maintainable.
A. Choosing Clarity Over Brevity
While operators can make your code more compact, readability should always be your priority. The most concise code isn't always the clearest or most maintainable.
i. Prefer Named Functions for Complex Operations When an operation doesn't have an obvious symbolic representation, a well-named function or method often communicates intent better than a custom operator:
// LESS CLEAR: Custom operator
let result = vector1 ≈≈ vector2
// MORE CLEAR: Named method
let result = vector1.isApproximatelyEqual(to: vector2)
ii. Document Non-Obvious Operators If you do use custom or overloaded operators, make sure they're well-documented, especially for team environments:
/// Performs vector cross product, returning a vector perpendicular to both inputs
infix operator ⨯: MultiplicationPrecedence
iii. Consider Cognitive Load Remember that each custom operator requires mental translation by anyone reading your code. The benefits should outweigh this additional cognitive load.
B. Avoiding Excessive Operator Chaining
Long chains of operators can become difficult to read, understand, and debug. Consider breaking complex expressions into smaller, named parts.
i. Before: Excessive Chaining
let finalValue = ((startValue * scaleFactor) + offset) ** exponent - threshold * modifier / divisor
ii. After: Improved Readability
let scaledValue = startValue * scaleFactor
let offsetValue = scaledValue + offset
let exponentValue = offsetValue ** exponent
let adjustment = threshold * modifier / divisor
let finalValue = exponentValue - adjustment
iii. Use Computed Properties in SwiftUI In SwiftUI, computed properties are often clearer than inline calculations:
struct ContentView: View {
@State private var sliderValue = 0.5
// Complex calculations extracted to computed properties
private var adjustedOpacity: Double {
sliderValue < 0.2 ? 0 : sliderValue * 1.2
}
private var dynamicPadding: CGFloat {
sliderValue * 30 + 10
}
var body: some View {
Circle()
.opacity(adjustedOpacity)
.padding(dynamicPadding)
.animation(.easeInOut)
}
}
C. Using Parentheses to Clarify Complex Expressions
Even when operator precedence would give the correct result, parentheses can make your intentions explicit and improve readability.
i. Mathematical Expressions
// Without parentheses (relies on precedence rules)
let result = 2 + 3 * 4 - 6 / 2
// With clarifying parentheses
let result = 2 + (3 * 4) - (6 / 2)
ii. Logical Conditions
// Potentially confusing
if isAdmin || isManager && hasAccess || isOwner && isActive {
// Code
}
// Much clearer with parentheses
if (isAdmin || isManager) && (hasAccess || (isOwner && isActive)) {
// Code
}
iii. When Mixing Different Operator Types
// Unclear without parentheses
let shouldProceed = isEnabled && remainingAttempts > 0 || isOverrideActive
// Clear with parentheses
let shouldProceed = (isEnabled && remainingAttempts > 0) || isOverrideActive
D. Consistent Style for Readability
Adopting a consistent style for operators improves code predictability and readability across your codebase.
i. Spacing Around Operators Choose a consistent approach to spacing around operators:
// Option 1: Spaces around all binary operators
let sum = a + b
let result = (value * multiplier) + offset
// Option 2: No spaces for high-precedence operators
let sum = a+b
let result = (value*multiplier) + offset
ii. Line Breaking for Long Expressions For multi-line expressions, break before operators for better readability:
let isEligible = user.isActive
&& user.hasVerifiedEmail
&& (user.permissionLevel >= requiredLevel
|| user.hasSpecialAccess)
iii. Consistent Operator Selection When multiple operators could express the same concept, choose one approach and use it consistently throughout your codebase:
// Choose one style and stick with it
let greeting = "Hello, " + username // Using concatenation operator
let greeting = "Hello, \(username)" // Using string interpolation
Following these best practices ensures your use of operators enhances rather than obscures your code's intent, making it more accessible to others (and your future self) while maintaining Swift's expressiveness and elegance.
8. What's Next
As we conclude this overview of Swift operators, you now have a fundamental understanding of what operators are, how they're classified, and how to use them effectively. This knowledge forms the foundation for the more detailed explorations that follow in subsequent sections.
A. Preview of Upcoming Sections
Our journey through Swift operators continues with dedicated sections that provide in-depth coverage of each operator category:
i. Unary Operators We'll explore operators that work with a single value, including prefix and postfix operators in depth, advanced uses of the NOT operator (!), sign operators (+ and -), and memory and reference operators.
ii. Binary Operators We'll dive deeper into the operators that work between two values: detailed exploration of arithmetic implementations, advanced uses of comparison operators, bitwise operations for performance optimization, and custom binary operators for domain-specific problems.
iii. Arithmetic Operators You'll master mathematical operations in Swift with numeric type considerations and conversions, performance implications of different arithmetic approaches, mathematical precision and error handling, and complex calculations in SwiftUI contexts.
iv. Comparison Operators We'll examine how comparison drives logic in your apps: object and value comparisons beyond simple types, custom comparison for complex data structures, sorting and filtering with comparisons, and SwiftUI view state management based on comparisons.
v. Logical Operators You'll learn sophisticated Boolean logic techniques: short-circuit evaluation for performance gains, complex condition composition, Boolean algebra principles in Swift, and combining multiple conditions to drive UI behavior.
vi. Ternary Operator We'll master the conditional operator with nested ternaries and their alternatives, UI state management with ternaries, performance considerations, and readability best practices.
B. How Operators Build on Each Other for Complex Operations
As you progress through these sections, you'll see how operators rarely exist in isolation. In real-world Swift applications, operators combine to create sophisticated expressions that drive your app's behavior.
i. Building Complex Expressions You'll learn how to combine operators from different categories to create powerful, expressive code:
// This expression combines arithmetic, comparison, and ternary operators
let adjustedScore = (rawScore * multiplier) > maxScore ? maxScore : (rawScore * multiplier)
// This one uses logical, comparison, and arithmetic operators
let shouldApplyDiscount = (purchaseCount > 5 && totalAmount >= 100) || isFirstPurchase
let finalPrice = shouldApplyDiscount ? originalPrice * 0.9 : originalPrice
ii. Creating Fluent Interfaces You'll discover how custom operators can lead to more readable domain-specific code:
// Building a complex filter using custom operators
let highValueActiveCustomers = customers
.filter(\.isActive)
.filter(\.lifetimeValue > 1000)
.sortedByDescending(\.lastPurchaseDate)
iii. SwiftUI Applications You'll see how operators create dynamic, responsive interfaces:
// Combining multiple operator types in SwiftUI
Circle()
.fill(isFavorite ? .red : .gray)
.frame(width: baseSize * (isSelected ? 1.2 : 1.0))
.opacity(isEnabled ? 1.0 : 0.5)
.offset(x: isShifted ? baseOffset + extraOffset : baseOffset)
By mastering each operator category and understanding how they work together, you'll develop the ability to write Swift code that is both powerful and elegant. These skills directly translate to creating more intuitive, responsive, and maintainable SwiftUI applications.
We hope this overview has provided a strong foundation for your journey into Swift operators. In the next section, we'll begin our deep dive with Unary Operators, exploring how these single-value transformations form the building blocks of more complex operations.
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1
Building Your iOS Development Foundation
Master the fundamentals of Swift programming with hands-on examples designed for beginners and experienced developers alike
2
Print Statements Debugging
Unlock the invisible processes in SwiftUI with strategic print statements that illuminate state changes, view lifecycles, and data flow
18:04
3
Comments: Documentation Waypoints in Your SwiftUI Codebase
Transform your code from mysterious instructions to a comprehensive narrative with strategic comments that explain the why
14:39
4
Variables and Constants
Learn when and how to use variables and constants to write safer, more efficient SwiftUI code
11:37
5
Strings and Interpolation
Learn essential string operations in Swift: Build better iOS apps with efficient text handling techniques
13:22
6
Swift Operators: The Foundation of SwiftUI Logic
Building powerful iOS apps through the language of operations
7
Unary Operators
Mastering the elegant simplicity of unary operators for cleaner, more expressive SwiftUI code that transforms your UI with minimal syntax
8
Binary Operators
Master the two-operand symbols that transform complex interface logic into concise, readable declarations
9
Arithmetic Operators
Learn how to implement and optimize arithmetic operations in SwiftUI, from basic calculations to complex mathematical interfaces
10
If-Else and Comparison Operators
Building Dynamic SwiftUI: Mastering If-Else and Comparison Operators
11
Logical Operators
Master SwiftUI's logical operators: Building intelligent iOS apps with robust decision-making systems
12
Ternary Operators
Use the power of Swift's ternary conditional operator to create dynamic, responsive interfaces with minimal code in SwiftUI
13
Blocks and Scope
A comprehensive guide to writing clean, organized code through proper variable management and state control
10:22
14
Swift Collections: Arrays, Sets, and Dictionaries Overview
Organize Your Data Effectively: Learn How to Choose and Optimize the Perfect Collection Type for Your SwiftUI Applications
15
Swift Arrays: The Basics Part 1
Master essential array operations and manipulations to build a solid foundation for iOS development
16
Swift Arrays: Best Practices in SwiftUI Part 2
Integrate arrays with SwiftUI, optimize performance, and implement professional-grade patterns for production apps
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We all try to be consistent with our way of teaching step-by-step, providing source files and prioritizing design in our courses.
Sourasith Phomhome
UI Designer
Designer at Design+Code
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4 hrs

SwiftUI Fundamentals Handbook
A comprehensive guide to mastering Swift programming fundamentals, designed for aspiring iOS developers. This handbook provides a structured approach to learning Swift's core concepts, from basic syntax to advanced programming patterns. Through carefully sequenced chapters, readers will progress from essential programming concepts to object-oriented principles, building a solid foundation for SwiftUI development. Each topic includes practical examples and clear explanations, ensuring a thorough understanding of Swift's capabilities. This handbook serves as both a learning resource and a reference guide, covering fundamental concepts required for modern iOS development. Topics are presented in a logical progression, allowing readers to build their knowledge systematically while gaining practical programming skills.
1 hrs

Design and Code User Interfaces with Galileo and Claude AI
In this course, you’ll learn how to use AI tools to make UI/UX design faster and more efficient. We’ll start with Galileo AI to create basic designs, providing a solid foundation for your ideas. Next, we’ll refine these designs in Figma to match your personal style, and finally, we’ll use Claude AI to turn them into working code—eliminating the need for traditional prototyping.
4 hrs

Build a React Native app with Claude AI
This comprehensive course explores the integration of cutting-edge AI tools into the React Native development workflow, revolutionizing the approach to mobile application creation. Participants will learn to leverage AI-powered platforms such as Claude and Locofy to expedite coding processes, enhance problem-solving capabilities, and optimize productivity.
13 hrs

Design and Prototype for iOS 18
Design and Prototype for iOS 18 is an immersive course that equips you with the skills to create stunning, user-friendly mobile applications. From mastering Figma to understanding iOS 18's latest design principles, you'll learn to craft two real-world apps - a Car Control interface and an AI assistant.
3 hrs

Master Responsive Layouts in Figma
Creating responsive layouts is a must-have skill for any UI/UX designer. With so many different devices and screen sizes, designing interfaces that look great and work well on all platforms is necessary. Mastering this skill will make you stand out in the field. In this course, we'll start from scratch to create this beautiful design using Figma. You'll learn how to make layouts that are easy to use and work well on any device. We'll cover key concepts and tools to help you master responsive design in Figma.
2 hrs

UI UX Design with Mobbin and Figma
Mobbin is a powerful tool for UI/UX designers seeking inspiration and innovative design solutions. This platform offers a vast collection of real-world mobile app designs, providing a treasure trove of UI elements and layouts.
2 hrs

3D UI Interactive Web Design with Spline
Learn to create 3D designs and UI interactions such as 3D icons, UI animations, components, variables, screen resize, scrolling interactions, as well as exporting, optimizing, and publishing your 3D assets on websites
3 hrs

Design and Prototype for iOS 17 in Figma
Crafting engaging experiences for iOS 17 and visionOS using the Figma design tool. Learn about Figma's new prototyping features, Dev Mode, variables and auto layout.
6 hrs

Design and Prototype Apps with Midjourney
A comprehensive course on transforming Midjourney concepts into interactive prototypes using essential design techniques and AI tools
8 hrs

iOS Design with Midjourney and Figma
Learn the fundamentals of App UI design and master the art of creating beautiful and intuitive user interfaces for mobile applications
1 hrs

UI Design for iOS, Android and Web in Sketch
Create a UI design from scratch using Smart Layout, Components, Prototyping in Sketch app
1 hrs

UI Design a Camera App in Figma
Design a dark, vibrant and curvy app design from scratch in Figma. Design glass icons, lens strokes and realistic buttons.
1 hrs

UI Design for iOS 16 in Sketch
A complete guide to designing for iOS 16 with videos, examples and design files
3 hrs

Prototyping in Figma
Learn the basics of prototyping in Figma by creating interactive flows from custom designs
1 hrs

UI Design Quick Websites in Figma
Learn how to design a portfolio web UI from scratch in Figma
1 hrs

UI Design Android Apps in Figma
Design Android application UIs from scratch using various tricks and techniques in Figma
2 hrs

UI Design Quick Apps in Figma
Design application UIs from scratch using various tricks and techniques in Figma
12 hrs

Figma Handbook
A comprehensive guide to the best tips and tricks in Figma
6 hrs