Swift 5.5 Released!
Swift 5.5 is a major release introducing powerful concurrency features like async/await, structured concurrency, and Actors, alongside other enhancements.
Objective-C
10 posts
Faster Mix-and-Match Builds with Precompiled Bridging Headers
Build times in Xcode projects that mix Objective-C and Swift rise due to the Swift compiler re-processing large bridging headers for each Swift file.
NSError
NSError is Cocoa's way to handle errors without exceptions. It tells about failures with a code, domain, and userInfo dictionary.
Key-Value Observing
Key-Value Observing (KVO) has an ugly, wordy API, but it is one of Cocoa’s most powerful features.
NSHashTable & NSMapTable
NSHashTable acts as a general version of NSSet. It is mutable, holds weak references, can copy items on input, and handles arbitrary pointers using pointer identity for equality and hashing.
NSEnumerator / NSFastEnumeration
Enumeration makes computation powerful by applying logic to collections.
NSAssertionHandler
In Objective-C, Foundation has macros like NSAssert for methods and NSCAssert for functions. They also have versions for parameters: NSParameterAssert and NSCParameterAssert.
NSValue
NSValue is the lightweight way to put any C scalar or struct (int, float, CGPoint, CGRect, NSRange, etc.) into an object so it can live in NSArray, NSDictionary, NSSet, etc.
KVC Collection Operators
The article discusses Key-Value Coding (KVC) Collection Operators in Objective-C, which provide a concise, Ruby-like syntax for performing aggregate operations on collections using valueForKeyPath:.
NS_ENUM & NS_OPTIONS
NS_ENUM and NS_OPTIONS are the modern, Apple-approved way to declare enums and bit-masks.