问题
A new API has been added in iOS 10 to present the list of other keyboards the user can switch to - the same list that appears when users long press the globe on a system keyboard. The declaration of the function is as follows:func handleInputModeList(from view: UIView, with event: UIEvent)
My question is, what's the proper way to generate a UIEvent to supply? I was planning to call this function using a UILongPressGestureRecognizer but this API doesn't reveal UIEvents.
回答1:
I was going about this the wrong way. No need for custom gesture handling. As noted in the headers, one should add a target-action to the control they want to trigger this, like so:
Objective-C:[keyboardButton addTarget:self action:@selector(handleInputModeListFromView:withEvent:) forControlEvents:UIControlEventAllTouchEvents];
Swift:keyboardButton.addTarget(self, action: #selector(handleInputModeList(from:with:)), for: UIControlEvents.allTouchEvents)
来源：https://stackoverflow.com/questions/37956329/proper-implementation-of-handleinputmodelist-in-custom-keyboard