Angular 2中的OnChanges和DoCheck有什么区别? [英] What is the difference between OnChanges and DoCheck in Angular 2?

问题描述

他们之间的差异对我来说似乎很混乱. 它们之间的区别以及确切的称呼时间

Difference between them seems to be very confusing to me. What is difference between them and exactly when they are called

推荐答案

当绑定到输入的值发生更改时，将调用

• ngOnChanges()(OnChanges)，以便在输入更改时可以运行自定义代码.

  • ngOnChanges() (OnChanges) is called when a value bound to an input has changed so you can run custom code when an input has changed.

    ngDoCheck()(DoCheck)，因此您可以实施自定义更改检测操作.

    ngDoCheck() (DoCheck) is called when change detection runs so you can implement your custom change detection action.

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