Angular 4组件生命周期 [英] Angular 4 component lifecycle
问题描述
我正在尝试使用Angular 4公开的组件生命周期挂钩来处理与组件有关的某些信息.
当我尝试搜索时，我能够找到由角度4暴露的生命周期挂钩列表( https ://angular.io/guide/lifecycle-hooks )
我对触发其中一些方法的代码片段更感兴趣.
例如，在Java中，以下代码行将触发"String"类中的构造函数:
I am trying to use the component life cycle hooks that are exposed by Angular 4 to process certain information related to the component.
When I tried to search I was able to find the list of life cycle hooks that are exposed by angular 4 (https://angular.io/guide/lifecycle-hooks)
I am more interested in the code snippet that triggers few of these methods.
For example in Java following lines of code would trigger the constructor in 'String' class:
String hotelName = new String("Marriott");
将触发以下生命周期方法的HTML，JavaScript代码是什么
What would be the HTML, JavaScript code that would trigger following life cycle methods:
- 构造函数
- ngOnInit
- ngAfterViewInit
- ngAfterViewChecked
- ngOnDestroy
谢谢.
推荐答案
在Angular中，框架将所有生命周期挂钩作为更改检测的一部分来触发.要了解有关该过程的更多信息，请阅读:
In Angular all lifecycle hooks are triggered as part of change detection by the framework. To learn more about the process read:
- Everything you need to know about change detection in Angular
- These 5 articles will make you an Angular Change Detection expert
例如，在Java中，以下代码行将触发 "String"类中的构造函数:
For example in Java following lines of code would trigger the constructor in 'String' class:
构造函数不是生命周期挂钩，并且在创建组件时被触发.这与您所展示的机制类似，其中包括使用new调用组件构造函数.
Constructor is not a lifecycle hook and is triggered when a component is created. It's similar mechanics to the one you showed which includes calling a component constructor with new.
要了解更多信息，请阅读:
To learn more read:
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