在reloadInputViews调用之后，UITextField不再重新加载keyboardType [英] UITextField no longer reloads keyboardType after reloadInputViews call

问题描述

在iOS 7中，我可以更改键盘类型，而它是 firstResponder （即时）：

In iOS 7, I could change the keyboard type while it is the firstResponder (on the fly):

if (textField.text.length > 2) {

    textField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
}
else
{
    textField.keyboardType = UIKeyboardTypeDefault;
}

[textField reloadInputViews];

// (Omitting some efficiency stuff to keep example to bare bones)

这在Xcode 6 / iOS 8下不再有效。文档主要反映了有关自定义键盘的更改。

This no longer works under Xcode 6/iOS 8. The documentations mostly reflect changes regarding custom keyboard.

使用resign /成为第一响应者是（仍然）工作：

Using resign/become first responder is (still) working:

[textField resignFirstResponder];

// Make keyboard change

[textField becomeFirstResponder];

但这只是一种矫枉过正的感觉。它正在撕裂并重建墙壁，只是为了更改它上面的图片。

But it just feels like an overkill. It's tearing and rebuilding a wall, just to change a picture on it.

这里有一个相关的帖子：
UITextView似乎没有实现reloadInputViews

There is a related post here: UITextView does not seem to implement reloadInputViews

但是似乎解决方案（在评论中）是显然将其声明为UITextView而不是UIResponder会影响它在运行时的行为方式....现在它可以正常工作

But it seems that the solution (in a comment) is "apparently declaring it as a UITextView instead of a UIResponder affects how it behaves during runtime. ... and it works now"

在我的情况下，是一个 UITextField ，我试图转换为 UITextView 以防万一。不行。

In my case it is a UITextField, and I tried to cast to UITextView just in case. No go.

我再次提到 在iOS7 / Xcode5下运行良好。

I'll mention again that it is working well under iOS7 / Xcode5.

我真的不知道这是Xcode 6的'beta'问题，还是iOS 8中的设计更改。

I don't really know if this is a 'beta' issue with Xcode 6, or a design change in iOS 8.

推荐答案

我发现了同样的问题。最好检查textField是否已经是firstResponder。

I found the same issue. It is better to check whether the textField is already the firstResponder or not.

[textField reloadInputViews]; // does not work on iOS8 !

if ([textField isFirstResponder]) {
    [textField resignFirstResponder];
    [textField becomeFirstResponder];
}

虽然不是很干净但是有效。

Not a clean way though, but it works.

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