• 例子一个文本如果返回NO那他就会强制结束用户编辑

    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.

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  • 文本框字符输入结束以上函数就会执行一次。

    The function above executes every time a character is entered in the input field.

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  • 文本框字符输入结束以上函数就会执行一次。

    The function above executes every time a character is entered in the input field.

    youdao

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