IOS添加计时器的两种方法

// 添加计时器的两种方法：1

timerShop=[NSTimer
scheduledTimerWithTimeInterval:3
target:self
selector:@selector(nextImage)
userInfo:nil
repeats:YES];

//触发计时器

[timerShop
fire];

//添加计时器的两种方法：2

//timerShop=[NSTimer timerWithTimeInterval:3 target:self selector:@selector(nextImage) userInfo:nil repeats:YES];

// [[NSRunLoop currentRunLoop] addTimer:timerShop forMode:NSDefaultRunLoopMode];