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Apple App-Development-with-Swift-Certified-User Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Data Handling and Logic	15%	- Basic data processing 1. Working with strings and numbers - Error handling 1. Do-catch and optional handling
Topic 2: SwiftUI Basics	25%	- Layout and navigation 1. Stacks, grids and alignment 2. Navigation patterns and presentation - State management 1. Data flow between views 2. Basic state properties - Views and controls 1. Built-in UI components 2. Modifiers and styling
Topic 3: App Design and Best Practices	15%	- User experience principles 1. Human Interface Guidelines - Code organization 1. Readability and maintainability
Topic 4: Development Environment	15%	- Xcode interface and tools 1. Navigating project structure 2. Using documentation and help resources - Building and running apps 1. iOS Simulator usage 2. Deploying to physical devices - Debugging techniques 1. Breakpoints and step-through execution 2. Logging and error resolution
Topic 5: Swift Programming Fundamentals	30%	- Control flow 1. Conditional statements and loops 2. Switch statements and pattern matching - Structures and classes 1. Properties, methods and initializers - Collection types 1. Arrays, dictionaries and sets - Functions 1. Parameter customization and default values 2. Definition, parameters and return values - Basic types and operators 1. Constants and variables 2. Data types, type inference and casting

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最新的 Apple App Development with Swift App-Development-with-Swift-Certified-User 免費考試真題 (Q19-Q24):

問題 #19

Which two assignments of a value to direction are allowed? (Choose 2.)

A. direction = direction.north
B. direction = CompassPoint.north
C. direction = north
D. direction = .north
E. direction = CompassPoint(north)

答案：B,D

解題說明：
This question belongs to Swift Programming Language , specifically the domain covering basic Swift types and how Swift handles enumerations . The code defines an enum named CompassPoint with the cases north, south, east, and west, and then declares direction as type CompassPoint. In Swift, an enum case can be assigned using the fully qualified form CompassPoint.north, so B is valid. Swift also allows the shorthand form .north when the compiler already knows the expected type is CompassPoint, so D is also valid. Apple's Swift language documentation explains that once a variable is known to be of a specific enumeration type, you can set its value using the shorter dot syntax.
The other options are not allowed. A is invalid because enum cases are not assigned using constructor-style syntax like CompassPoint(north). C is invalid because north by itself is not enough unless it is written with dot shorthand in a context with inferred enum type. E is invalid because north is a case of the enum type, not a member accessed from the variable instance as direction.north. Swift enum cases are referenced from the enum type or by shorthand dot syntax, not as instance properties.

問題 #20
In SwiftUI, how can you extract a subview from a main view to make the code more modular?

A. Declare the subview as a variable inside the main view and call it directly.
B. Create a new SwiftUI view struct and call it in the main view.
C. Add the subview's code directly into the main view's body.
D. Use @State to manage subview content and use a binding to create a two-way connection.

答案：B

解題說明：
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective about extracting subviews to simplify the structure of an overlarge view . The correct answer is C because the standard SwiftUI approach to modularizing a large interface is to create a separate custom view, usually as a new struct conforming to View, and then use that view inside the main view. Apple's tutorials and documentation repeatedly show this pattern: move part of the UI into its own SwiftUI view type, then compose the main screen from smaller view components.
Option A is not the primary SwiftUI pattern for extracting a reusable subview. Option B does the opposite of modularization, because it keeps everything in the same large body. Option D is about state management and data flow, not about extracting a visual component into its own reusable subview. Apple's SwiftUI materials emphasize composition, where views are lightweight and can be split into smaller reusable pieces for clarity, maintainability, and reuse. WWDC guidance also shows Xcode's "Extract Subview" workflow, which creates a separate view structure from selected UI code.

問題 #21
Review the code.
var capitalCities = [ " USA " : " Washington D.C. " , " Spain " : " Madrid " , " Peru " : " Lima " ] Which two statements add the capital city of " Italy " to the dictionary? (Choose 2.)

A. capitalCities[ " Italy " ] = " Rome "
B. capitalCities.updateValue( " Rome " , forKey: " Italy " )
C. capitalCities = capitalCities + [ " Italy " : " Rome " ]
D. capitalCities[ " Rome " ] = " Italy "
E. capitalCities.append([ " Italy " : " Rome " ])

答案：A,B

問題 #22
Which property wrapper allows you to read data from the system or device settings?

A. @Environment
B. @StateObject
C. @Binding
D. @State

答案：A

解題說明：
Comprehensive and Detailed Explanation From App Development with Swift domains:
This question belongs to View Building with SwiftUI , specifically the objective about using property wrappers such as @State, @Binding, and @Environment to manage and share data between views.
The correct answer is @Environment because it is used to read values provided by the system or the surrounding view environment. These values can include device-related or system-provided information such as size classes, color scheme, locale, and dismiss actions. In SwiftUI, @Environment gives a view access to contextual information that it does not own directly, but which is supplied by the framework or ancestor views.
The other options are not correct for this purpose:
* @State is used for local mutable state owned by the current view.
* @Binding is used to create a two-way connection to state owned elsewhere, usually in a parent view.
* @StateObject is used to create and own an observable reference-type object for the lifetime of the view.
So if you want a SwiftUI view to read data coming from system or device settings, the correct property wrapper is @Environment .

問題 #23
Review the code snippet.

Move each item from the list on the left to the correct code segment on the right. You may use each item only once.
Note: You will receive partial credit for each correct response.

答案：

解題說明：

Explanation:

This question belongs to Swift Programming Language , specifically the domain covering structs, properties, methods, and initializers .
A computed property does not store a value directly. Instead, it returns a value calculated from other data.
That is why description is a computed property: it returns a string based on content.
A memberwise initializer is automatically provided by Swift for structs when their stored properties are initialized through parameters. So Document(content: " Greetings! " ) is using the struct's memberwise initializer.
A type property belongs to the type itself rather than to an instance. In Swift, static var docCount = 0 is a type property because it is declared with static.
An instance method is a function that belongs to an instance of the struct or class. The display() method uses the instance's content, so it is an instance method.
A type method is a method declared with static and belongs to the type itself. So static func increment() is a type method because it changes the shared type property docCount.

問題 #24
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