由于未捕获的异常'UIViewControllerHierarchyInconsistency'而终止应用， [英] Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency',

问题描述

我在选择器上方创建了一个带有两个按钮的工具栏并在ios7上工作，当我在ios8崩溃时运行：

I created a toolbar above the picker with two buttons and worked on ios7, when i run in ios8 crash:

终止应用程序二到未捕获的异常
'UIViewControllerHierarchyInconsistency'，原因：'子视图
控制器：应该是
有父视图控制器：但是请求的父级是：'

Terminating app two to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller: Should Have parent view controller: but requested parent is: '

这是在ios7中安静运行的一段代码：

This is the piece of code that worked quietly in ios7:

 expiredPromoTextField.inputView = DatePicker;
 expiredPromoTextField.delegate = self;
 quantityPromoTextField.inputView = quantityPicker;
 quantityPromoTextField.delegate = self;


 // Create button to close the UIPickerView
 UIToolbar * mypickerToolbar = [[UIToolbar alloc] initWithFrame: CGRectMake (0, 0, 320, 56)];
 mypickerToolbar.barStyle = UIBarStyleBlackTranslucent;
 [mypickerToolbar sizeToFit];
 NSMutableArray * barItems = [[NSMutableArray alloc] init];
 UIBarButtonItem * CancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemCancel target: self action:selector (cancelDoneClicked)];
 [barItems addObject: CancelBtn];
 UIBarButtonItem * FLEXspace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: self action: nil];
 [barItems addObject: FLEXspace];
 UIBarButtonItem * doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemDone target: self action:selector (pickerDoneClicked :)];
 [barItems addObject: doneBtn];
 [mypickerToolbar setItems: barItems animated: YES];
 [quantityPicker setShowsSelectionIndicator: YES];

 expiredPromoTextField.inputAccessoryView = mypickerToolbar;
 quantityPromoTextField.inputAccessoryView = mypickerToolbar;

你知道我意识到的是 inputAccessoryView 将要崩溃的应用程序，我也问苹果公司的工程师，他们告诉我这是测试版的问题，但现在GM继续给出同样的问题。

You know what I realized is that inputAccessoryView is going to crash the app, I also asked engineers of Apple and they told me that it was a problem with the beta, but now with the GM continues to give the same problem.

我该怎么办？

推荐答案

我在iOS 8上遇到了同样的例外情况，现在修复为以下代码。

I had the same exception on iOS 8 and now fixed as the following codes.

重点是，您不应将输入视图添加为视图控制器视图的子视图。
（我不知道为什么代码在iOS 7中运行良好，在iOS 8中不再运行良好。）

The point is, you should not add an input view as a child view of view controller's view. (I have no idea why the code worked well in iOS 7 is no longer working well in iOS 8.)

之前（发生错误）

UITextField* someTF;
View* customView;
UIViewController *mainVC;

[mainVC.view addSubview:customView];
someTF.inputView = customView;

之后（运作良好）

UITextField* someTF;
View* customView;
UIViewController *mainVC;

//  [mainVC.view addSubview:customView];  <-- delete this line
someTF.inputView = customView;

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