Class 错误地实现了接口 'OnChanges'。 属性 'ngOnChanges' 类型缺失

Class incorrectly implements interface 'OnChanges'. Property 'ngOnChanges' is missing in type

我基本上开始使用 angular 4 并在使用 ngChanges 时遇到此错误

Class 'GalleryComponent' incorrectly implements interface 'OnChanges'.Property 'ngOnChanges' is missing in type 'GalleryComponent'.

我真的不知道该怎么做,我知道一个 class 可以有多个接口,但事件只使用一个它显示相同的错误

import { Component, OnInit, OnChanges, Input } from '@angular/core';
import { ImageService } from '../image/shared/image.service';

@Component({
  selector: 'app-gallery',
  templateUrl: './gallery.component.html',
  styleUrls: ['./gallery.component.css']
})


export class GalleryComponent implements OnInit, OnChanges {
visibleImages: any[] = [];

 constructor(private imageService: ImageService) {
  this.visibleImages = this.imageService.getImages();
 }

 ngOnInit() {}

 OnChanges(){}

}

如果有人能注意到我遗漏了什么,我将不胜感激 提前致谢

第一期是函数名:

OnChanges(){}
To
ngOnChanges(changes: SimpleChanges){}

您需要在 ngOnChanges 函数中添加参数 changes: SimpleChanges

ngOnChanges(changes: SimpleChanges) {
    // changes.prop contains the old and the new value...
}

请阅读以下内容: https://angular.io/api/core/OnChanges