ARC-circular reference-solution, arc-reference solution

ARC-circular reference-solution, arc-reference solution

1. The most common type of code for loop reference.

 

-(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. optional * firstArray = [[NSMutableArray alloc] init]; NSMutableArray * secondArray = [[financialloc] init]; [firstArray addObject: secondArray]; [secondArray addObject: firstArray];}

 

Ii. Solution to circular reference.

1. the programmer manually disconnects a ring and stops loop reference.

2. Weak references. Because weak references hold objects, the reference count is not increased. This prevents the generation of circular references.

 

3. Common examples of weak references to avoid circular references.

There are two viewcontrollers, which need to transmit data to each other. In this case, the delegate member variable of ViewController is usually a weak reference. The objective is to avoid circular reference between two viewcontrollers.

 

References: iOS development time series-Tang Qiao