我有一个 Today Extension，我有一个文本字段和按钮，我想做的是 if textfield.hasText == true 做一些事情和 if textfield.hasText == false 然后我想在小部件中显示警报
首先，iOS Extensions中不允许Keyboard Entry，所以在Today Widget中有一个UITextField > 没有任何意义。
Because user interaction with Today widgets is quick and limited, you should design a simple, streamlined UI that highlights the information users are interested in. In general, it’s a good idea to limit the number of interactive items in a widget. In particular, note that iOS widgets don’t support keyboard entry.
关于ios - 使用 Swift 在 Today Extension(小部件)中显示警报，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48481618/
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