Set the button to be of type Cancel and remove any event code.

将按钮设置为cancel类型并删除所有事件代码。

youdao

You also want to supply a Cancel button with code as follows.

您还要提供一个Cancel按钮，其代码如下。

youdao

You also want to supply a Cancel button with code as follows.

您还要提供一个Cancel按钮，其代码如下。

youdao