如何区分UITableViewCell的哪个部分已被点击 [英] how can I distinguish which part of UITableViewCell has been clicked

问题描述

我使用自定义 UITableViewCell 创建了 UITableView 。我的单元格左侧包含一个 UIImageView ，右侧包含 UITextView 。

I have created a UITableView with a custom UITableViewCell. My cell includes one UIImageView on the left and UITextView on the right.

在 UITableViewController 内，我在tableview中设置了图像和文本 cellForRowAtIndexPath 。

Inside UITableViewController, I set both image and text in tableview cellForRowAtIndexPath.

一切都很好但现在我需要实现 didSelectRowAtIndex 我需要区分是否 UIImageView 或单元格的UITextView 。

Everything shows fine but now I need to implement didSelectRowAtIndex and I need to distinguish if UIImageView or UITextView of the cell has been clicked.

假设图像单击表示删除操作，其余的单元格编辑操作。

Let's say, image clicking is representing delete action and the rest of the cell editing action.

推荐答案

您可以在表格中添加一个，而不是将手势识别器添加到每个单独的单元格中。查看并确定从用户触摸点选择的单元格，然后确定用户是否触摸了图像或单元格。

Rather than adding the gesture recognisers to each individual cell, you can add one to the table view and determine which cell was selected from the point of the users touch, and then determine if the user touched the image or the cell.

首先确保您的控制器采用了UIGestureRecognizerDelegate协议。

First make sure your controller adopts the UIGestureRecognizerDelegate protocol.

@interface MyTableViewController() <UIGestureRecognizerDelegate>
@end

然后添加 UIGestureRecognizer 到 UITableView 。

    - (void)viewDidLoad
{
    [super viewDidLoad];
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
    singleTap.delegate = self;
    singleTap.numberOfTapsRequired = 1;
    singleTap.numberOfTouchesRequired = 1;
    [self.tableView addGestureRecognizer:singleTap];
}

此委托方法确定 handleTap：方法。如果它可以从用户触摸中找到 indexPath ，则返回 YES 否则返回否。

This delegate method determines if the handleTap: method should be executed. If it can find an indexPath from the users touch, then it returns YES otherwise it returns NO.

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    UITableView *tableView = (UITableView *)gestureRecognizer.view;
    CGPoint p = [gestureRecognizer locationInView:gestureRecognizer.view];
    if ([tableView indexPathForRowAtPoint:p]) {
        return YES;
    }
    return NO;
}

一旦我们确定用户是否单击了一个单元格，handleTap：调用方法，然后决定用户是否触摸了图像或单元格的任何其他部分。

Once we have determined if the user has clicked in a cell, the handleTap: method is called, which then decides if the user touched the image, or any other part of the cell.

- (void)handleTap:(UITapGestureRecognizer *)tap
{
    if (UIGestureRecognizerStateEnded == tap.state) {
        UITableView *tableView = (UITableView *)tap.view;
        CGPoint p = [tap locationInView:tap.view];
        NSIndexPath* indexPath = [tableView indexPathForRowAtPoint:p];
        [tableView deselectRowAtIndexPath:indexPath animated:NO];
        UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
        CGPoint pointInCell = [tap locationInView:cell];
        if (CGRectContainsPoint(cell.imageView.frame, pointInCell)) {
            // user tapped image
        } else {
            // user tapped cell
        }
    }
}

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