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解决方案0
@protocol HYAnimationWeakDelegate <NSObject>
@optional
- (void)animationDidStart:(CAAnimation *)anim;
- (void)animationDidStop:(CAAnimation *)anim;
@end
@interface HYAnimationDelegateManager : NSObject <CAAnimationDelegate>
@property (weak, nonatomic) id<HYAnimationWeakDelegate> delegate;
@end
@implementation HYAnimationDelegateManager
- (void)animationDidStart:(CAAnimation *)anim {
if (_delegate && [_delegate respondsToSelector:@selector(animationDidStart:)]) {
[_delegate animationDidStart:anim];
}
}
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
if (_delegate && [_delegate respondsToSelector:@selector(animationDidStop123:)]) {
[_delegate animationDidStop:anim];
}
}
@end
//使用:
HYAnimationDelegateManager * manager = [HYAnimationDelegateManager new];
manager.delegate = self;
anim.delegate = manager;
解决方案1
声明一个单独的类实现delegate的回调
//.h
#import <UIKit/UIKit.h>
@interface AnimationDelegate : NSObject
@end
//.m
#import "AnimationDelegate.h"
@implementation AnimationDelegate
- (void)animationDidStart:(CAAnimation *)anim
{
NSLog(@"Animation Start");
}
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
NSLog(@"Animation Stop");
}
- (void)dealloc
{
NSLog(@"Delegate Dealloc");
}
@end
使用方式
self.animation.delegate = [[AnimationDelegate alloc]init];
eg: http://blog.csdn.net/a787188834/article/details/78303594
解决方式2:
使用NSProxy来解决
该类可直接引用YYKit中的YYWeakProxy类
使用方法
self.animation.delegate = [YYWeakProxy proxyWithTarget:self];
//NSTimer
https://www.jianshu.com/p/469bf43e522b
