Before you can change the button's label, though, you need to get access to the node; and before you can do that, you need an ID to reference the button by. This should be old hat by now, right?

在修改按钮的标签之前需要访问该节点，而在此之前需要引用按钮id。

youdao

Before you can change the button's label, though, you need to get access to the node; and before you can do that, you need an ID to reference the button by. This should be old hat by now, right?

在修改按钮的标签之前需要访问该节点，而在此之前需要引用按钮id。

youdao