Question

我正在尝试在imageView内的tableView cell上添加点按手势。问题是如果我将手势代码放在cellForRow中，它无法识别网址，当然所有图像都会获得最后一个单元格的网址。如果我将手势代码放在didSelect中，则url总是为空，我认为因为手势在单元格获取数据之前正在工作。

imageView应根据其网址打开一个视频文件，该文件从XML解析器中获取。

selectedArticle = [self getArticleAtIndex:indexPath];
UIImageView* imageTap = [          
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]
                                                 initWithTarget:self
                                                 action:@selector(actionHandleTapOnImageView)];
            [singleTap setNumberOfTapsRequired:1];
            imageTap.userInteractionEnabled = YES;
            [imageTap addGestureRecognizer:singleTap]

(void)actionHandleTapOnImageView{
    NSString *path = selectedArticle.videoUrl;
    NSURL *videoURL = [NSURL URLWithString:path];
    MPMoviePlayerViewController *theArticle = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
    [self presentMoviePlayerViewControllerAnimated:theArticle];
    theArticle.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
    [theArticle.moviePlayer play];
}

Answer 1

我认为最好添加一个按钮而不是一个imageview。代码应该看起来像这样：

// in cell for row:
UIButton *buttonImage = [UIButton buttonWithType:UIButtonTypeCustom];
buttonImage.frame = CGRectMake(5.0, 5.0, 40.0, 40.0);
buttonImage.tag = indexPath.row;
[buttonImage setBackgroundImage:yourImage forState:UIControlStateNormal];
[buttonImage addTarget:self action:@selector(imageTap:) forControlEvents:UIControlEventTouchUpInside];
[cell addSubview:buttonImage];

然后在imageTap：

- (void)imageTap:(UIButton *)sender
{
    selectedArticle = [self getArticleAtIndex:sender.tag];
    NSString *path = selectedArticle.videoUrl;
    NSURL *videoURL = [NSURL URLWithString:path];
    MPMoviePlayerViewController *theArticle = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
    [self presentMoviePlayerViewControllerAnimated:theArticle];
    theArticle.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
    [theArticle.moviePlayer play];
}

此方法可以防止您在表格单元格中使用点击识别器的某些副作用。它很容易理解和纠正。

UITableViewCell中的imageView UITapGestureRecognizer

1 个答案: