一个 UIImagePickerController 用于多个 ImageVIews

Question

你能帮我处理 UIImagePickerController

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，但我无法让它工作，因为我是 Swift 的新手。

Answer 1

为 Storyboard 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)

}

定义变量来存储当前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

这与 swift 无关。您在 Interface builder 中（或在代码中设置了一个“标签”编号。UIResponder 后代上有一个 .tag 属性）。 之后，您在回调方法中进行切换，例如

为了更清楚一点：

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