Ios 在特定时间后取消UILongPressGestureRecognitor

我在我的

UICollectionView

中使用了

uiLongPressGestureRecognitor

。现在，当我在一定时间后（例如1秒）用手指触摸CollectionView项目时，我希望我的

ui长按gestureRecognitor

结束并执行特定代码：

if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {}

这是我的代码：

- (void)viewDidLoad {
  [super viewDidLoad];
  Public = [[PublicMethods alloc]init];
  self.view.backgroundColor = [UIColor whiteColor];
  [self.view addSubview:self.collect];

  UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongPress:)];
  lpgr.minimumPressDuration = 3; //seconds
  lpgr.delaysTouchesBegan = YES;
  lpgr.delegate = self;
  [self.collect addGestureRecognizer:lpgr];


}
-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer {
  if (gestureRecognizer.state != UIGestureRecognizerStateEnded) {
    return;
  }

  CGPoint p = [gestureRecognizer locationInView:self.collect];
  NSIndexPath *indexPath = [self.collect indexPathForItemAtPoint:p];
  if (indexPath == nil){
    NSLog(@"couldn't find index path");
  } else {
    // get the cell at indexPath (the one you long pressed)
    //CollectionViewCell* cell = (CollectionViewCell*)[self.collect cellForItemAtIndexPath:indexPath];
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"bala" message:@"jalaaaa" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
    [alert show];
  }
}

---

您可以在启动

ui长按手势识别器时实例化计时器，然后在计时器完成后取消手势并执行“结束手势”代码，例如（使用1秒的时间限制）：

嘿，你想让它发生在你的minimumPressDuration=3秒后的1秒还是3秒后？@LyndseyScott我想在3秒结束手势后将我的手指放在采集单元上……如果你想让
minimumPressDuration
和最大持续时间都是3秒，你可以简单地将结束代码放在
如果（gestureRecognizer.state==UIGestureRecognizerStateStart）{
有条件。我当前的回答假设您希望手势在识别后3秒取消，例如，如果手势在用户开始按屏幕后3秒开始，它将在6秒钟内取消。FYI@LyndseyScott我的朋友你的答案不起作用！！！！我的朋友这个答案不起作用。我得到这个按摩“找不到索引路径”@mamal10那行代码对你有用吗？我根本没有更改过你的那部分代码。@mamal10如果它以前确实对你有用，请查看我的更新答案，因为它可能会有所不同。我移动了手势取消代码，所以它在你的“结束手势”之后“代码。我的朋友，我想在3秒钟结束手势后，即使我把手指放在手机上，我也要这样做。”cell@mamal10然后（就像我在各种评论中提到的）更改minimumPressDuration和timer duration，使minimumPressDuration+timer duration==3，以便自动识别手势，或者只需将结束代码放入一个
if（gestureRecognitizer.state==uigestureRecognitizerStateStart）{conditional
，以便在3秒时识别手势（minimumPressDuration），代码立即执行。
- (void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer {
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        // Create a timer that calls cancel: 2.5 second after the 
        // gesture begins (i.e. 3 seconds after the button press if
        // if lpgr.minimumPressDuration = .5;. Pass the gesture
        // recognizer along within the user info dictionary parameter.
        timer = [NSTimer scheduledTimerWithTimeInterval:2.5 target:self selector:@selector(cancel:) userInfo:[NSDictionary dictionaryWithObjectsAndKeys:gestureRecognizer, @"gestureRecognizer", nil] repeats:NO];

    } else if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
        // Assuming you still want to execute the end code
        // if the user lifts their finger before the 3 seconds
        // is complete, use the same method called in the timer.
        [self cancel:nil];
    }
}

- (void)cancel:(NSTimer*)timerObject {

    NSLog(@"%@",[timer.userInfo objectForKey:@"gestureRecognizer"]);
    // Get the gesture recognizer from the info dictionary
    UIGestureRecognizer *gestureRecognizer = [timer.userInfo objectForKey:@"gestureRecognizer"];

    CGPoint p = [gestureRecognizer locationInView:self.collect];
    NSIndexPath *indexPath = [self.collect indexPathForItemAtPoint:p];
    if (indexPath == nil){
        NSLog(@"couldn't find index path");
    } else {
        // get the cell at indexPath (the one you long pressed)
        //CollectionViewCell* cell = (CollectionViewCell*)[self.collect cellForItemAtIndexPath:indexPath];
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"bala" message:@"jalaaaa" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
        [alert show];
    }

    // Disable it and re-enable it to cancel the gesture
    gestureRecognizer.enabled = NO;
    gestureRecognizer.enabled = YES;

    // Invalidate the timer
    [timer invalidate];
    timer = nil;
}