要求
选项卡每切换一次,就加载对应的一个echarts 图,要有一开始的动画效果
效果如下:
注意点
1、echarts要想每次都能重新加载,需要移除"_echarts_instance_"属性,否则一切换选项卡,就再也加载不出来了
2、在ts 中获取html 页面元素,不能写在构造方法里,应该写在ionViewDidEnter()方法里
3、选项卡<ion-segment> 不要搭配[ngSwitch] 的方式,因为这种情况下,只能获取当前选项卡中的元素,未选中的选项卡里的元素获取不到,在第2步骤ionViewDidEnter() 方法里自然也是获取不到。应当搭配(ionChange)使用方式
4、不能直接将chart作为全局变量,这样的话第二次加载就没有动画效果了
献上代码
html文件
<ion-header> <ion-navbar> <ion-title>区域</ion-title> </ion-navbar> </ion-header> <ion-content padding> <ion-segment [(ngModel)]="choice" (ionChange)="segmentChanged($event)"> <ion-segment-button value="choice1"> 省份增速排名 </ion-segment-button> <ion-segment-button value="choice2"> 市州增速排名 </ion-segment-button> <ion-segment-button value="choice3"> 全省走势 </ion-segment-button> <ion-segment-button value="choice4"> 市州占比 </ion-segment-button> </ion-segment> <div id="chartContainer" style="width: 100%; height: 300px;"></div> </ion-content>
ts文件
import {Component} from "@angular/core"; import * as echarts from "echarts"; @Component({ selector: "page-data-area", templateUrl: "area.html" }) export class DataAreaPage { choice: string = "choice1"; ec: any = echarts; chartContainer: any; constructor() { } clickChart1() { const chart1 = this.ec.init(this.chartContainer); chart1.setOption({ series: { type: "pie", data: [{ name: "A", value: 10 }, { name: "B", value: 20 }, { name: "C", value: 30 }, { name: "D", value: 40 }] } }, true); this.chartContainer.removeAttribute("_echarts_instance_"); } clickChart2() { const chart2 = this.ec.init(this.chartContainer); chart2.setOption({ series: { type: "pie", data: [{ name: "A", value: 10 }, { name: "B", value: 20 }, { name: "C", value: 30 }] } }, true); this.chartContainer.removeAttribute("_echarts_instance_"); } clickChart3() { const chart3 = this.ec.init(this.chartContainer); chart3.setOption({ series: { type: "pie", data: [{ name: "A", value: 10 }, { name: "B", value: 20 }, { name: "C", value: 30 }, { name: "D", value: 40 }, { name: "E", value: 50 }] } }, true); this.chartContainer.removeAttribute("_echarts_instance_"); } clickChart4() { const chart4 = this.ec.init(this.chartContainer); chart4.setOption({ series: { type: "pie", data: [{ name: "A", value: 10 }, { name: "B", value: 20 }, { name: "C", value: 30 }, { name: "D", value: 40 }, { name: "E", value: 50 }, { name: "F", value: 60 }] } }, true); this.chartContainer.removeAttribute("_echarts_instance_"); } segmentChanged(e) { if (e.value == "choice1") { this.clickChart1(); } else if (e.value == "choice2") { this.clickChart2(); } else if (e.value == "choice3") { this.clickChart3(); } else if (e.value == "choice4") { this.clickChart4(); } } ionViewDidEnter() { this.chartContainer = document.getElementById("chartContainer"); this.clickChart1(); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/acm-bingzi/p/ionicChartsTab.html