问题
I would like to be able to input text in either Left-to-Right and Right-to-Left languages into a UISearchBar. This means that once a user has started inputing text in right to left languages, I would like the text alignment to be to the right and vice versa.
The question is - Is there any way to catch these events of language switching? Thanks for your help.
回答1:
Yes there is. You want to subscribe to UITextInputCurrentInputModeDidChangeNotification. See the UITextInputMode Class Reference.
回答2:
Use this code in ViewDidLoad
searchbar.semanticContentAttribute = .forceRightToLeft
来源：https://stackoverflow.com/questions/9251592/how-to-change-the-alignment-of-a-uisearchbar-according-to-the-input-language