在NavigationController和tabBarController下使用UIImagePickerController時出錯

Question

在NavigationController和tabBarController下有3個UIViewController。

推這樣的viewControllers：A-> B->Ç

在的viewController C，添加以下代碼，讓用戶從照片庫中選擇圖像。

func btnClicked() { 
    let imagePickerController = UIImagePickerController() 
    imagePickerController.sourceType = .photoLibrary 
    imagePickerController.delegate = self 
    self.present(imagePickerController, animated: true, completion: nil) 
} 


func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage{ 
     topIamge.image = image 
    } 

    picker.dismiss(animated: false, completion: nil) 

} 

問題是，用戶選擇一個圖像或取消選擇後，然後按下左欄按鈕回到B，錯誤Unbalanced calls to begin/end appearance transitions for顯示時，如果繼續回到A，錯誤被打印出再次。

我做錯了什麼？

P.S.如果我按下後退按鈕而不顯示UIImagePickerController，則不會出現錯誤。

Thx。

Answer 1

我敢肯定，它不相關的UIImagePickerController 檢查這些解決方案： https://stackoverflow.com/a/12230777/6131436

https://stackoverflow.com/a/20925686/6131436