We do not set callbacks from the view to the controller directly in the markup.

我们无需在 markup 中直接设置从视图到控制器的回调。

youdao

Again, these are callbacks to the View class, so your only chance to define them is when you build a custom component.

再说一次，这些是View类相关的回调方法，所以你只能在你构建自定义组件时定义它们。

youdao