NSTimer *timer = [NSTimer timerWithTimeInterval:1 repeats:YES block:^(NSTimer * _Nonnull timer) {
}];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
[[NSRunLoop currentRunLoop] run];
timer加入runloop,自动进入倒计时.
[timer setFireDate:[NSDate distantFuture]]; //倒计时暂停
[timer setFireDate:[NSDate distantPast]]; //继续倒计时
[timer invalidate];//倒计时永久停止,但不会释放内存为空.
一、NSTimer 创建方法 1 NSTimer *timer = [NSTimer scheduledTimer...
创建NSTimer 创建NSTimer的常用方法是： + (NSTimer *)scheduledTimerWit...
1 NSTimer //1秒后执行 NSTimer *timer = [NSTimer timerWithTim...
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:...
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:...
NSTimer NSTimer.png
NSTimer * timer = [NSTimer scheduledTimerWithTimeInterval...
1.NSTimer的创建方法 2. NStimer的开启 3. NStimer的停止 4. NStimer的其他属...
NSTimer * timer;timer = [NSTimer scheduledTimerWithTimeIn...
NSTimer *timer = [NSTimer schduledTimerWithTimeInterval:1...
本文标题：NSTimer
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