Content is what is passed as children. View is the template of the current component.
The view is initialized before the content and ngAfterViewInit() is therefore called before ngAfterContentInit().
@Component({ selector: ‘parent-cmp‘, template: ‘<div #wrapper><ng-content></ng-content></div>‘ }) class ParentComponent { @ViewChild(‘wrapper‘) wrapper:ElementRef; @ContentChild(‘myContent‘) content:ElementRef; ngAfterViewInit() { console.log(‘ngAfterViewInit - wrapper‘, this.wrapper); console.log(‘ngAfterViewInit - content‘, this.content); } ngAfterContentInit() { console.log(‘ngAfterContentInit - wrapper‘, this.wrapper); console.log(‘ngAfterContentInit - content‘, this.content); } }
<parent-cmp><div #myContent>foo</div></parent-cmp>
If you run this code, the output for ngAfterViewInit - content should be null.
So if you want to change the child component‘s props, you cannot do it in ‘ngAfterViewInit‘, you need to do it in ‘ngAfterContentInit‘.
[Angular] Difference between ngAfterViewInit and ngAfterContentInit
原文：http://www.cnblogs.com/Answer1215/p/6417872.html