在自定义键盘中正确实现 handleInputModeList [英] Proper implementation of handleInputModeList in Custom Keyboard

问题描述

iOS 10 中添加了一个新的 API，以显示用户可以切换到的其他键盘的列表 - 与用户在系统键盘上长按地球仪时显示的列表相同.函数声明如下:
func handleInputModeList(from view: UIView, with event: UIEvent)

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)

我的问题是，生成要提供的 UIEvent 的正确方法是什么?我打算使用 UILongPressGestureRecognizer 调用这个函数，但这个 API 没有显示 UIEvents.

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.

推荐答案

我的做法是错误的.无需自定义手势处理.如标题中所述，应该向他们想要触发此操作的控件添加一个目标操作，如下所示:

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:

目标-C:
[keyboardButton addTarget:self action:@selector(handleInputModeListFromView:withEvent:) forControlEvents:UIControlEventAllTouchEvents];

斯威夫特:
keyboardButton.addTarget(self, action: #selector(handleInputModeList(from:with:)), for: UIControlEvents.allTouchEvents)

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