举个例子,一个文本框如果返回了NO那他就会强制结束用户的编辑。
As an example, a text field in the middle of editing might want to implement this method to return NO to force the user to finish editing.
文本框中每一个字符的输入结束,以上的函数就会执行一次。
The function above executes every time a character is entered in the input field.
文本框中每一个字符的输入结束,以上的函数就会执行一次。
The function above executes every time a character is entered in the input field.
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