objective c init unavailable
Generated on 8/1/2024
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It seems like you're asking about the init_unavailable
attribute in Objective-C. While the provided context doesn't directly address this, I can provide some general information about it.
In Objective-C, the init_unavailable
attribute is used to mark initializers as unavailable. This is useful when you want to prevent certain initializers from being used, typically because they are not appropriate for the class or could lead to incorrect usage.
Here's an example of how you might use it:
@interface MyClass : NSObject
- (instancetype)init NS_UNAVAILABLE;
- (instancetype)initWithParameter:(id)parameter NS_DESIGNATED_INITIALIZER;
@end
In this example, the default init
method is marked as unavailable, and only the initWithParameter:
initializer is allowed.
For more detailed information on initializers and their usage in Swift, you might want to check out the session on Migrate your app to Swift 6, which discusses various aspects of initializers and concurrency in Swift.
If you have any specific questions about the content presented at WWDC, feel free to ask!
Analyze heap memory
Dive into the basis for your app’s dynamic memory: the heap! Explore how to use Instruments and Xcode to measure, analyze, and fix common heap issues. We’ll also cover some techniques and best practices for diagnosing transient growth, persistent growth, and leaks in your app.
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Discover how Swift balances abstraction and performance. Learn what elements of performance to consider and how the Swift optimizer affects them. Explore the different features of Swift and how they’re implemented to further understand the tradeoffs available that can impact performance.
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Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.
Migrate your app to Swift 6
Experience Swift 6 migration in action as we update an existing sample app. Learn how to migrate incrementally, module by module, and how the compiler helps you identify code that’s at risk of data races. Discover different techniques for ensuring clear isolation boundaries and eliminating concurrent access to shared mutable state.