IOS初级:NSTimer
@property (nonatomic, strong) NSTimer *timer; 添加定时器 self.timer = [NSTimer scheduledTimerWithTimeInterval:999.0 target:self selector:@selector(executeFun) userInfo:nil repeats:YES];//999.0代表要延时的时间,executeFund代表要999秒后需要执行的方法 [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];//将定时器加入到事件循环 删除定时器 [self.timer invalidate]; self.timer = nil;