- (void)init51ios{
//延時的方法
//1:GCD延時 此方式在可以在參數中選擇執行的線程。是一種非阻塞的執行方式，沒有找到取消執行的方法。
double delay1=2.0;//設置延時時間
dispatch_time_t popTime=dispatch_time(DISPATCH_TIME_NOW, delay1 * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"" message:@"51ios.net" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:@"取消", nil];
[alert show];
});
//2:NSTimer延時,此方式要求必須在主線程中執行，否則無效。是一種非阻塞的執行方式，可以通過NSTimer類的- (void)invalidate;取消執行。
[NSTimer scheduledTimerWithTimeInterval:8.0f target:self selector:@selector(delayMethod2) userInfo:nil repeats:NO];
//3:PerformSelector延時
[self performSelector:@selector(delayMethod) withObject:nil afterDelay:5.0f];
//4:NSThread 延時
[NSThread sleepForTimeInterval:11.0f];
[self delayMethod3];
}
- (void)delayMethod{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"" message:@"51ios.net延時" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:@"取消", nil];
[alert show];
}
- (void)delayMethod2{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"" message:@"51ios.netNSTimer延時" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:@"取消", nil];
[alert show];
}
- (void)delayMethod3{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"" message:@"51ios.netNSThread延時" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:@"取消", nil];
[alert show];
}