使用UITextField自定义键盘扩展

Question

I have custom keyboard extension with UITextField in it. I am able switch to UITextField 's text input, but cannot switch back to self.textDocumentProxy . Does anybody know, how to do something like [self.textDocumentProxy becomeFirstResponder] ?

(By the way, it looks like "GIF Keyboard" app provides such possibility)

Answer 1

I've implemented next workaround for this:

1. My textFied inherits from UITextField . UserInteraction disabled to prevent it from becomeFirstResponder (because you are not able switch back to system input). I've added blinking UIView as cursor imitation ( blinking animation ). Change this cursor origin.x in overwrited setText: method by calculating length of current string (use boundingRectWithSize: method for this).

2. When user types something I am checking if textField is active (showed) and then adding/removing symbols to textField (with setText: ) or self.textDocumentProxy insertText: / deleteBackward methods accordingly.