How is automatic memory management organized using AutoreleasePool in Objective-C?

Automatic memory management in Objective-C using AutoreleasePool is based on a deferred object release mechanism. When an object is created with a method that returns an object with a +1 retain count (for example, alloc/init), it needs to be released manually. To simplify this, an autorelease pool is used with @autoreleasepool.

Objects sent to the autorelease method are placed in the current autorelease pool. This pool holds references to objects that will be released later — usually at the end of the current event cycle.

Example usage:

@autoreleasepool {
    NSString *tempString = [[NSString alloc] initWithFormat:@"Hello, %@!", @"World"];
    // tempString will be automatically released when exiting the block
}

Thus, AutoreleasePool helps manage the lifetime of objects by releasing them automatically, reducing the likelihood of memory leaks and simplifying the code.