Question

知道怎么做吗？我的UIImageView中的每个单元格内都有UITableView，我想在用户开始触摸UIImageView时禁用滚动，然后在用户启用后启用它停止在照片上拖动手指。

Answer 1

我只是给出了我的逻辑。

将UIPanGestureRecognizer添加到UITableView.

的每个单元格

UIPanGestureRecognizer* panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanFrom:)];
[cell addGestureRecognizer:panGestureRecognizer];

方法名称为handlePanFrom:

 - (void)handlePanFrom:(UIPanGestureRecognizer*)recognizer 
{

    CGPoint translation = [recognizer translationInView:recognizer.view];
    CGPoint velocity = [recognizer velocityInView:recognizer.view];

    if (recognizer.state == UIGestureRecognizerStateBegan) 
    {
      /// track began
      tableView.userInteractionEnabled = NO;    
    } 
    else if (recognizer.state == UIGestureRecognizerStateChanged) 
    {
        // track the movement
    } else if (recognizer.state == UIGestureRecognizerStateEnded) 
    {
        //  final position
        tableView.userInteractionEnabled = YES;
    }
 }

确保您的UIIMageView必须设置为userInteractionEnabled = YES;。因为默认情况下UIIMageView必须设置userInteractionEnabled = NO;.

Answer 2

有两种方法可以实现此目的，包括UITapGestureRecognizer或UIPanGestureRecognizer到您的UIImageView，并设置目标是您的自定义UITableViewCell类或包含

的目标和操作

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event

UIImageView自定义类中的方法，并通过协议将委托设置为自定义UITableViewCell。

对于UIGestureRecognizer，您可以检查其状态属性UIGestureRecognizer Class Reference，以便在开关的帮助下了解状态

typedef enum {
   UIGestureRecognizerStatePossible,

   UIGestureRecognizerStateBegan,
   UIGestureRecognizerStateChanged,
   UIGestureRecognizerStateEnded,
   UIGestureRecognizerStateCancelled,

   UIGestureRecognizerStateFailed,

   UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded
}

最后，通过切换UITableView的scrollEnabled属性来停止并开始滚动UITableView是UIScrollView的子类

Answer 3

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    if ([touch.view isKindOfClass:[UIImageView class]]) {
        NSLog(@"self.tableView.scrollEnabled = NO");
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    if ([touch.view isKindOfClass:[UIImageView class]]) {
        NSLog(@"self.tableView.scrollEnabled = YES");
    }
}

IOS检测用户何时停止触摸UIImageView

3 个答案: