UILongPressGestureRecognizer不会在处理程序上返回Tag

Question

我正在向这个单元格添加一个手势

UILongPressGestureRecognizer *gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleGestureSection:)];

[gesture view].tag = indexPath.row;
gesture.minimumPressDuration = 0.5;
gesture.allowableMovement = 600;
[cell addGestureRecognizer:gesture];

我试图获取indexPath.row

• （void）handleGestureSection：（UIGestureRecognizer *）手势{

  if（gesture.state == UIGestureRecognizerStateEnded）{     NSLog（@“Long press Ended”）;

  } else if（gesture.state == UIGestureRecognizerStateBegan）{     NSInteger i = [手势视图] .tag; } }

但总是回归0。 我做错了什么？

Answer 1

你得到0，因为来自UIGestureRecognizer的视图是零。

首先，您应该为每个单元格添加UIGestureRecognizer。

UILongPressGestureRecognizer* longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(gestureHandler:)];
longPressGesture.delegate = cell;
[longPressGesture setMinimumPressDuration:2.0];
[cell addGestureRecognizer:longPressGesture];

然后，处理gestureHandler：

UIGestureRecognizer *recognizer = (UIGestureRecognizer*) sender;
CGPoint p = [recognizer locationInView:self.tableView];    
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:p];