scheduledTimerWithTimeInterval使用方法

1、定义NSTimer

NSTimer *lookforTimer;

2、初始化，添加定时器前先移除

[lookforTimer invalidate];

lookforTimer=nil;

lookforTimer= [NSTimerscheduledTimerWithTimeInterval:2.0ftarget:selfselector:@selector(lookforCard:)userInfo:nilrepeats:YES];

3、停止

[lookforTimer invalidate];

lookforTimer =nil;

封装

#pragma mark - 添加定时器

- (void)addTimer

{

self.Timer= [NSTimerscheduledTimerWithTimeInterval:1.0target:selfselector:@selector(lookforCard)userInfo:nilrepeats:YES];

[[NSRunLoop mainRunLoop] addTimer:self.TimerforMode:NSRunLoopCommonModes];

}

#pragma mark - 移除定时器

- (void)removeTimer

{

[self.Timerinvalidate];

self.Timer=nil;

}