让Packery / Masonry使用angular2

发布时间：2020-12-17 10:23:40 所属栏目：安全来源：网络整理

导读：我正在尝试让Packery / Masonry在一个组件上工作. Packery正在检测容器,但是它的高度为零表示内容未加载,即使我正在使用imagesLoaded.我已经尝试过使用各种生命周期钩子,但它们都有相同的结果,所以有点丢失我错的地方. import {BlogService} from './blog.se

我正在尝试让Packery / Masonry在一个组件上工作. Packery正在检测容器,但是它的高度为零表示内容未加载,即使我正在使用imagesLoaded.我已经尝试过使用各种生命周期钩子,但它们都有相同的结果,所以有点丢失我错的地方.

import {BlogService} from './blog.service';
import {Blog} from './blog.model';
import {Component,ElementRef,OnInit,AfterViewInit} from '@angular/core';
import {LinkyPipe} from '../pipes/linky.pipe';

declare var Packery: any;
declare var imagesLoaded: any;

@Component({
  moduleId: module.id,selector: 'blog',templateUrl: 'blog.component.html',providers: [BlogService],pipes: [LinkyPipe]
})

export class BlogComponent implements OnInit,AfterViewInit {
  blogs: Blog[];
  errorMessage: string;
  constructor(private _blogService: BlogService,public element: ElementRef) { }
  ngOnInit() {
    this.getBlogs();
  }

  ngAfterViewInit() {
    let elem = this.element.nativeElement.querySelector('.social-grid');
    let pckry;
    imagesLoaded(elem,function(instance) {
      console.log('loaded');
      pckry = new Packery(elem,{
        columnWidth: '.grid-sizer',gutter: '.gutter-sizer',percentPosition: true,itemSelector: '.social-card'
      });
    });
  }

  getBlogs() {
    this._blogService.getPosts()
      .subscribe(
      blogs => this.blogs = blogs,error => this.errorMessage = <any>error);
  }
}

好吧我做了我需要使用AfterViewChecked而不是当我第一次尝试时它结束了一个永无止境的循环,因为每次DOM更改时都会触发它,因为你会看到有一些额外的检查,所以它只发射一次.仍然不确定这是否是正确的方法,但它现在有效.

import {BlogService} from './blog.service';
import {Blog} from './blog.model';
import {Component,AfterViewChecked} from '@angular/core';
import {LinkyPipe} from '../pipes/linky.pipe';
declare var Packery: any;
declare var imagesLoaded: any;
@Component({
  moduleId: module.id,selector: 'coco-blog',pipes: [LinkyPipe]
})
export class BlogComponent implements OnInit,AfterViewChecked {
  blogs: Blog[];
  errorMessage: string;
  isGridInitialized: boolean;
  constructor(private _blogService: BlogService,public element: ElementRef) { }
  ngOnInit() {
    this.getBlogs();
  }
  ngAfterViewChecked() {
    if (this.blogs && this.blogs.length > 0 && !this.isGridInitialized) this.initGrid();
  }
  getBlogs() {
    this._blogService.getPosts()
      .subscribe(
      blogs => this.blogs = blogs,error => this.errorMessage = <any>error);
  }
  initGrid() {
    this.isGridInitialized = true;
    let elem = document.querySelector('.social-grid');
    let pckry;
    imagesLoaded(elem,function(instance) {
      console.log('all images are loaded');
      pckry = new Packery(elem,{
        percentPosition: true,itemSelector: '.social-card',gutter: 20
      });
    });
  }
}

（编辑：李大同）

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