从下一个minitue计算当前时间,然后NSTimer不应该工作

Question

嗨,我是iOS的新手.现在我对这个概念感到困惑.我的概念就是当我点击按钮时我想获得当前时间(HH:MM:SS).在按钮上我做了一些重复的任务通过使用NSTimer.once我得到NSTimer sholud无效后的当前时间(nstimer呼叫每个(0.05f)).在这里我需要计算紧急时间与下一个minitue.thanks提前.不要误以为我我是愚蠢的英文.这是我现在还在的代码..

- (void) scanButtonTouchUpInside {


    if (check) {
        position=CGPointMake(14.0f, 7.0f);
        position1=CGPointMake(7.0f, 14.0f);
        check=NO;

       timer= [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];



    }
  else
  {
      //animation stop code here.................
      if ([timer isValid]) {
          [timer invalidate];
      }
      check=YES;
      NSLog(@"stopppppppp.....................");
//      overlayGraphicView.frame = CGRectMake(30, 100, 32, 32);
//      overlayGraphicView1.frame = CGRectMake(30, 152, 32, 32);
  }


}

-(void)onTimer
{


    overlayGraphicView.center = CGPointMake(overlayGraphicView.center.x+position.x,overlayGraphicView.center.y+position.y);

    if(overlayGraphicView.center.x > 320 || overlayGraphicView.center.x < 0)
        position.x = -position.x;
    if(overlayGraphicView.center.y > 480 || overlayGraphicView.center.y < 0)
        position.y = -position.y;



    overlayGraphicView1.center = CGPointMake(overlayGraphicView1.center.x+position1.x,overlayGraphicView1.center.y+position1.y);

    if(overlayGraphicView1.center.x > 320 || overlayGraphicView1.center.x < 0)
        position1.x = -position1.x;
    if(overlayGraphicView1.center.y > 480 || overlayGraphicView1.center.y < 0)
        position1.y = -position1.y;


}

Answer 1

我这样做的方式很简单......

-(void)onTimer
{


    overlayGraphicView.center = CGPointMake(overlayGraphicView.center.x+position.x,overlayGraphicView.center.y+position.y);

    if(overlayGraphicView.center.x > 320 || overlayGraphicView.center.x < 0)
        position.x = -position.x;
    if(overlayGraphicView.center.y > 480 || overlayGraphicView.center.y < 0)
        position.y = -position.y;



    overlayGraphicView1.center = CGPointMake(overlayGraphicView1.center.x+position1.x,overlayGraphicView1.center.y+position1.y);

    if(overlayGraphicView1.center.x > 320 || overlayGraphicView1.center.x < 0)
        position1.x = -position1.x;
    if(overlayGraphicView1.center.y > 480 || overlayGraphicView1.center.y < 0)
        position1.y = -position1.y;
  }
- (void) scanButtonTouchUpInside {

    [self performSelector:@selector(timerInvalidate) withObject:nil afterDelay:60.0];
    if (check) {
        position=CGPointMake(14.0f, 7.0f);
        position1=CGPointMake(7.0f, 14.0f);

       timer= [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];



    }

}

-(void)timerInvalidate
{
    if ([timer isValid]) {
        [timer invalidate];
    }
}

覆盖源取自https://github.com/jj0b/OverlayViewTester