iOS中的定时器

@property(nonatomic,strong)NSTimer* timer;

1.1手动加入消息循环

// 开启定时器

-(void)startTimer{

    self.timer=[NSTimer timerWithTimeInterval:3 target:self selector:@selector(nextPage) userInfo:nil repeats:YES];

    [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];

}

// 移除定时器

- (void)stopTimer

{

    [self.timer invalidate];

    self.timer = nil;

}

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1.2 自动加入消息循环

// 开启定时器

-(void)startTimer

{

         self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(nextPage) userInfo:nil repeats:YES];

}

 // 移除定时器

- (void)stopTimer

{

    [self.timer invalidate];

     self.timer = nil;

}

2.

@property(nonatomic,strong)CADisplayLink* link;

 //开启定时器

-(void)startTimer

{

       self.link = [CADisplayLink displayLinkWithTarget:self selector:@selector(updateLrc)];

    [self.link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];

}

//移除定时器

- (void)stopTimer

{

    [self.link  invalidate];

    self.link  = nil;

}