ios - 长按 UITableView

Question

我想在 UITableViewCell 上长按以打印“快速访问菜单”。 有人已经这样做了吗？

特别是 UITableView 上的手势识别？

Answer 1

首先将长按手势识别器添加到表格 View :

UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc] 
  initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = 2.0; //seconds
lpgr.delegate = self;
[self.myTableView addGestureRecognizer:lpgr];
[lpgr release];

然后在手势处理程序中:

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
    CGPoint p = [gestureRecognizer locationInView:self.myTableView];

    NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:p];
    if (indexPath == nil) {
        NSLog(@"long press on table view but not on a row");
    } else if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        NSLog(@"long press on table view at row %ld", indexPath.row);
    } else {
        NSLog(@"gestureRecognizer.state = %ld", gestureRecognizer.state);
    }
}

你必须小心，这样它就不会干扰用户正常点击单元格，还要注意 handleLongPress 可能会触发多次(这将是由于手势识别器状态变化)。