一个用于多个ImageVIews的UIImagePickerController

Question

你能不能用UIImagePickerController来帮助我

我在1个ViewController中有12个ImageView。我需要帮助，以便每个ImageView可以从库中选择不同的照片。有人告诉我为他们使用标签，但我不能让它工作，因为我是Swift的新手。

Answer 1

为故事板上的每个UIImageView启用User Interaction Enabled。

将TapGestureRecogniser添加到每个UIImageView。将每个TapGestureRecogniser与IBAction连接起来。

@IBAction func tap(_ sender: UITapGestureRecognizer) {

    currentImageView = sender.view as! UIImageView

    let picker = UIImagePickerController()
    picker.delegate = self
    self.present(picker, animated: true, completion: nil)

}

定义变量以存储当前的UIImageView

private var currentImageView: UIImageView? = nil

处理图像选择并将图像分配给currentImageView

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    let image = info[UIImagePickerController.InfoKey.originalImage]
    currentImageView?.image = image as! UIImage

    self.dismiss(animated: true, completion: nil)
}

Answer 2

这不是关于迅捷。您在“接口”构建器（或代码中）中设置了“标记”编号.UIResponder后代上有.tag属性。之后，你在回调方法中进行切换，如：

为了使它更清楚：

let picker: UIImagePicker! = { 
    // setup your image picker here, don't forget to set the proper delegate
}()

var lastSender: AnyObject?
func onTouch(_ sender: AnyObject?) {
    // add checks for the sender here
    lastSender = sender
    present(picker, animated: true, completion: *Your Completion*)
}

代表：

在

func imagePickerController(_ picker: UIImagePickerController, 
      didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])

let image = *Get Image From Info* 
 lastSender?.image = image