inputAccessoryView 中的 UITextField 不会成为FirstResponder [英] UITextField in inputAccessoryView won't becomeFirstResponder

问题描述

我有一个名为 songInfoView 的视图，其中包含 3 个 UITextFields 和一个 UIButton.我在父视图中创建了一个临时 UITextField 来调出键盘并将 SongInfoView 指定为 inputAccessoryView.这按预期工作.

I have a view called songInfoView with 3 UITextFields and a UIButton. I create a temp UITextField in the parent view to bring up the keyboard and assign songInfoView as the inputAccessoryView. This works as expected.

然后，我尝试将 SongInfoView 中的文本字段设置为第一响应者.光标移动到此字段，但当我尝试键入时，没有任何反应.我可以点击文本字段并按预期输入，但我希望它无需点击即可工作.我错过了什么吗?我这样做不正常吗?感谢您的帮助.

Then, I try to set a text field in songInfoView as first responder. The cursor moves to this field, but when I try to type, nothing happens. I can tap on the text field and type as expected, but I want it to work without having to tap on it. Am I missing something? Am I doing this out of order? Thanks for your help.

songInfoView = [[SongInfoViewController alloc]init];
songInfoView.delegate = self;

UITextField *tempTextField = [[UITextField alloc]initWithFrame:CGRectMake(10.0f, 10.0f, 50.0f, 30.0f)];
[self.view addSubview:tempTextField];
[tempTextField setInputAccessoryView:songInfoView.view];
[tempTextField becomeFirstResponder];
[songInfoView.titleTextField becomeFirstResponder];

推荐答案

好吧，我自己想出来了.事实证明(我认为)屏幕键盘(连同它的附件视图)有它自己的窗口.所以，在 songInfoView 的 viewDidAppear 方法中，我不得不调用

Well, I figured it out myself. It turns out (I think) that the on screen keyboard (along with it's accessory view) has it's own window. So, within songInfoView's viewDidAppear method, I had to call

[self.view.window makeKeyAndVisible];

请记住在键盘消失后用于加载键盘的视图控制器中再次调用它.希望这可以帮助其他人.

Just remember to call this again within the view controller you used to load the keyboard after the keyboard disappears. Hope this helps someone else down the road.

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