ios - 我如何确定 UIImagePickerView 的呈现位置？

Question

我有两个按钮，button1 和button2。点击这些按钮将显示 UIImagePickerViewController。在委托(delegate)方法 didFinishPickingMediaWithInfo 中，我如何确定 UIImagePickerViewController 是从哪个按钮的操作中呈现的？

Answer 1

您可以使用 Tag 属性来识别您的对象，最初为您的每个 UIButton 分配标签，然后在 UIImagePickerController 出现时分配按钮标记为 UIImagePickerController.view.tag，例如

例如

 @IBAction func buttonOneClick(_ sender:UIButton) {
    //... code for present the UIImagePickerController
    yourimagePicker.view.tag = sender.tag
}
@IBAction func buttonTwoClick(_ sender:UIButton) {
      //... code for present the UIImagePickerController
       yourimagePicker.view.tag = sender.tag
}

或者为您的 UIButton 创建通用方法

 @IBAction func buttonPresentImage(_ sender:UIButton) {
      //... code for present the UIImagePickerController
       yourimagePicker.view.tag = sender.tag
}

最后你可以识别 UIImagePickerController 委托(delegate)方法

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if picker.view.tag == button1.tag {
        // its button1
    } else {
        // its button2
    }
}