TestView 得到一个附加文本字段，并且只有当光标位于文本字段上时工具栏命令才可用。

TestView gets an additional text field, and the toolbar command is only available if the text field has the focus.

youdao

TestView 得到一个附加文本字段，并且只有当光标位于文本字段上时工具栏命令才可用。

TestView gets an additional text field, and the toolbar command is only available if the text field has the focus.

youdao