小编Mar*_*udo的帖子

当我在ios8崩溃中运行时,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:

终止应用程序2到未捕获的异常'UIViewControllerHierarchyInconsistency',原因:'子视图控制器:应该有父视图控制器:但是请求的父级是:'

这是在ios7中安静工作的代码段:

 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 = …