【setter方法内存管理之三 Objective-C语言】

前言

例如，有如下代码： Person对象的定义如下： @interface Person : NSObject { Car *_car; } – (void)setCar:(Car *)car; – (Car *)car; – (void)drive; @end @implementation Person – (void)setCar:(Car *)car { [_car release]; _car = [car retain]; } – (Car *)car { return _car; } – (void)drive { NSLog(@"走，去拉萨。。。); [_car run]; } – (void)dealloc { [_car release]; NSLog(@“人挂了。。。”); [super dealloc]; } @end

Car类的定义如下： @interface Car : NSObject { int _speed; } – (void)setSpeed:(int)speed; – (int)speed; – (void)run; @end @implementation Car – (void)setSpeed:(int)speed { _speed = speed; }