objective-c - 在 iOS 8 中向小键盘添加 'Done' 按钮时出错

Question

因此，小键盘默认情况下没有“完成”按钮，因此我想添加一个。在 iOS 7 及更低版本中，有一些向键盘添加按钮的技巧，但它们似乎在 iOS 8 中不起作用。

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
    if(textField.keyboardType == UIKeyboardTypeNumberPad){
        textField.inputAccessoryView=self.toolBar; ///self.toolBar is a IBOutlet of UIToolBar and in this toolBar have a button 'Done'.

}

当运行此代码时，应用程序将终止并给出错误:

'UIViewControllerHierarchyInconsistency', reason: 'child view controller:
<UICompatibilityInputViewController: 0x7b283d20> should have parent view controller:
<HJ_PCreateUpdateCareTeamVC: 0x7a79bfc0> but requested parent is:
<UIInputWindowController: 0x7b9c9200>' 

Answer 1

我做到了:

 textField = [[UITextField alloc]initWithFrame:CGRectMake(0, 20, self.view.bounds.size.width, 44)];
    textField.backgroundColor = [UIColor colorWithRed:220.0/255.0 green:220.0/255.0 blue:220.0/255.0 alpha:1.0];

[self.view addSubview:textField];
textField.keyboardType = UIKeyboardTypeNumberPad;


UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 44)];
UIBarButtonItem *doItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doDone)];
[toolBar setItems:@[doItem]];


textField.inputAccessoryView = toolBar;

///没问题