获取 keyboardType 在InputView Delegate方法而不是ViewDidLoad中。因为在键盘完全呈现并且输入对象被激活之前你无法获得keyboardType。

Get the keyboardType in InputView Delegate Methods Instead of ViewDidLoad . Because you can't get the keyboardType until The keyboard is fully presented and the input object is activated .

- (void)textWillChange:(id<UITextInput>)textInput {

    NSLog(@"TextInputMode: %ld", self.textDocumentProxy.keyboardType);

}

OR

- (void)textDidChange:(id<UITextInput>)textInput {

    NSLog(@"TextInputMode: %ld", self.textDocumentProxy.keyboardType);

}