标签：col loop 实现 线程 after open src method 时间
- (void)delayMethod { NSLog(@"execute"); }
[self performSelector:@selector(delayMethod) withObject:nil afterDelay:1.0f];
[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(delayMethod) userInfo:nil repeats:NO];
[NSThread sleepForTimeInterval:1.0f]; [self delayMethod];
double delayInSeconds = 1.0; __block ViewController* bself = self; dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC)); dispatch_after(popTime, dispatch_get_main_queue(), ^(void){ [bself delayMethod]; });
1. 延时方法一(使用NSRunLoop类中的方法实现延迟执行，，常用，，performSelector必须在主线程中执行) [self delayOne]; 2. 延时方法二（GCD方式常用）(此方式在可以在参数中选择执行的线程。是一种非阻塞的执行方式) __block ViewController* bself = self; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ [bself isOneway]; }); 3. 延时方法三（必须在主线程中执行) NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(isOneway) userInfo:nil repeats:NO]; 取消方法 [timer invalidate]; 4. 延时方法四 (此方式在主线程和子线程中均可执行,是一种阻塞的执行方式，建议放到子线程中，以免卡住界面) [NSThread sleepForTimeInterval:5.0]; [self isOneway]; -(void)delayOne{ [self performSelector:@selector(isOneway) withObject:nil afterDelay:5.0f]; } -(void)isOneway{ self.view.backgroundColor = [UIColor cyanColor]; }
标签：col loop 实现 线程 after open src method 时间
原文地址：https://www.cnblogs.com/edensyd/p/8878024.html
