NSTimer弱引用,解决循环引用无法释放问题
作者:互联网
#import <Foundation/Foundation.h> /** Timer 间接事件目标代理 */ @interface WeakTimerTarget : NSObject @property (nonatomic, weak) id target; @property (nonatomic, assign) SEL selector; @property (nonatomic, weak) NSTimer* timer; + (NSTimer *) scheduledTimerWithTimeInterval:(NSTimeInterval)interval target:(id)aTarget selector:(SEL)aSelector userInfo:(id)userInfo repeats:(BOOL)repeats; @end
#import "WeakTimerTarget.h" @implementation WeakTimerTarget + (NSTimer *) scheduledTimerWithTimeInterval:(NSTimeInterval)interval target:(id)aTarget selector:(SEL)aSelector userInfo:(id)userInfo repeats:(BOOL)repeats { WeakTimerTarget *timerTarget = [[WeakTimerTarget alloc] init]; timerTarget.target = aTarget; timerTarget.selector = aSelector; timerTarget.timer = [NSTimer scheduledTimerWithTimeInterval:interval target:timerTarget selector:@selector(fire:) userInfo:userInfo repeats:repeats]; return timerTarget.timer; } - (void)fire:(NSTimer *)timer{ if(self.target) { [self.target performSelector:self.selector withObject:timer.userInfo]; } else { [self.timer invalidate]; } } - (void)dealloc{ NSLog(@"%s",__func__); } @end
调用:
NSTimer *sendMailRetryTimer = [WeakTimerTarget scheduledTimerWithTimeInterval:60*10 target:self selector:@selector(sendMailRetry) userInfo:nil repeats:YES];
主要隔离timer引用的Target不为self.
标签:target,timer,selector,循环,引用,NSTimer,repeats,userInfo 来源: https://www.cnblogs.com/HJiang/p/16263528.html