Question

enter image description here

这是我们搜索任何应用时来自应用商店的图片。我还想添加相同的scrollview概念，在其中显示currentntimage，并预览上一张和下一张图片。我可以在Sample code的帮助下制作此视图。但是没有找到任何解决方案，当用户点击任何图像时如何获得索引或标记值。这样我就可以打开每个图像的详细信息页面。如果有人对此有所了解，请帮助我。

提前致谢。

Answer 1

将手势识别器添加到必要的图像视图中：

UITapGestureRecognizer *frameTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(frameTapGesture:)];
[_imgView addGestureRecognizer:frameTapGesture];

然后在手势处理程序中访问附加到的视图手势识别器：

- (void)frameTapGesture:(UITapGestureRecognizer*)sender
{
    UIView *view = sender.view; //cast pointer to the derived class if needed
    NSLog(@"%d", view.tag);
}

Answer 2

如果没有看到应用程序的完整图片而有可能提出建议，为什么不使用自定义UIButton代替UIImageViews呢？使用UIButton，您可以设置操作并传递发件人ID，您可以从中轻松访问您的代码并从阵列中提取数据。

  UIButton *button = [[UIImageView alloc] initWithFrame:CGRectMake(10, i*100 + i*15, 300, 100)];
button.backgroundColor = [UIColor blueColor];
button.tag = i;
[button addTarget:self action:@selector(touchDown:) controlEvent:UIControlEventTouchDown];

在touchDown：方法内部，您只需将发件人强制转换为UIButton即可访问该标记

- (void)touchDown:(id)sender    
{
    UIButton* button = (UIButton*)sender;
    switch(button.tag)
    {
        case TAG1:
          break;
        //etc
    }    
}

或者检查出来

UIScrollView *myScroll = [[UIScrollView alloc] initWithFrame: CGRectMake (0,100,200,30)];
NSMutableArray = *images = [NSMutableArray alloc] initWithObjects: img1,img2,img3,nil];


for (int i=0; i<3; i++)
{
    // set `imageView` frame 
    UIImageView *imageV = [[UIImageView alloc]initWithFrame:yourFrame];
    [imageV setImage:[images objectAtIndex:i]];
    [imageV setUserInteractionEnabled:YES];
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:     self action:@selector (getTag:)];
    [imageV addGestureRecognizer: singleTap];
    [myScroll addSubview:imageV];

}

根据需要将标签设置为图像成功添加所有imageView后，您可以点击这样： -

-(void)getTag:(id)sender
{
     UIGestureRecognizer *recognizer = (UIGestureRecognizer*)sender;
     UIImageView *imageView = (UIImageView *)recognizer.view;

     if(imageView.image.tag==1)
     {
         [imageView setImage:[UIImage imageNamed:@"anyImage.png"]];
     }
}

Answer 3

实现您希望的最佳方式是为您的图像添加UITapGesture：

let tapgesture = UITapGestureRecognizer(target: self, action: Selector("openImage:"))
tapgesture.numberOfTapsRequired = 1
//if you're using a collectionView or tableview add this code inside cellForItemAtIndexPath
cell.Img.addGestureRecognizer(tapgesture)
//otherwise
myImage..addGestureRecognizer(tapgesture)

获取点击手势的超级视图，这将为您提供正确的indexPath。试试这个：

func openImage(sender: UITapGestureRecognizer) 
{
     let point = sender.view
     let mainCell = point?.superview
     let main = mainCell?.superview
     let cell: myViewCell = main as! myViewCell
     let indexPath = collectionView.indexPathForCell(cell)
}

您可以根据您的层次结构级别增加或减少超级视图。从一个超级视图开始并继续增加，直到获得indexPath

Answer 4

假设您有一个包含要显示的对象的数组和一个UIImageView来显示图像，只需在设置索引为i的视图时执行此操作：

imageView.tag = kImageTag + i;

其中kImageTag是任何常数＆gt; 1确保你没有得到0作为标签。

现在，当选择视图时，您只需检查图像视图的标记。

Answer 5

我已经解决了这个问题，非常感谢所有人看看我的问题。

Answer 6

对于使用storyboards和swift的人：

在IB（界面构建器）中更改每个UIView或UIImageView的标记ex：
```
view1.tag = 1
view2.tag = 2
view3.tag = 3
...
```
仍然在故事板中将UITapGestureRecognizer添加到您在故事板视图中放置的每个UIView（view1，view2，view3 ......）：

在Swift文件中编写函数：

// swift文件中的代码：

    @IBAction func viewTapped(sender: AnyObject) {
            // You can write anything here. I'm guessing you need something with 'enable/disable' function, and the best call is the CustomView which you create from File > New file
            print("tapped view is view with tag: \(sender.view!!.tag)")
        }

将每个TapGestureRecognizer连接到您在父UIViewController swift文件中声明的相同功能：

完成。

Answer 7

迅速

@objc func tabAction(_ sender: YourView){
   /*
   Its weird, sender is not type of `YourView` it is `UITabGestureRecognizer`.
   You can get `YourView` reference from gesture
   */
   let tabedView = sender.view as? YourView
}

Answer 8

@IBAction func tapOnRatingInfo(_ sender: UITapGestureRecognizer) {

  guard let index = sender.view?.tag else {
        return
    }
}

从imageview点击手势获取索引或标记值

8 个答案: