Objective-C Language Memory Management Strong and weak references
Example
Modern
A weak reference looks like one of these:
@property (weak) NSString *property;
NSString *__weak variable;
If you have a weak reference to an object, then under the hood:
- You're not retaining it.
- When it gets deallocated, every reference to it will automatically be set to
nil
Object references are always strong by default. But you can explicitly specify that they're strong:
@property (strong) NSString *property;
NSString *__strong variable;
A strong reference means that while that reference exists, you are retaining the object.
