前言：CADisplayLink、NSTimer循环引用问题 CADisplayLink、NSTimer会对Target产生强引用，如果target又对他们产生强引用，那么就会引发循环引用。@interfaceViewController()@property(nonatomic,strong)CADisplayLink*link;@property(nonatomic,strong)NSTimer*time;@end@implementationViewController-(void)viewDidLoad{[superviewDidLoad];//保证调用频率和刷帧频率60fpssel
