Léo*_*oco 15 javascript charts vue.js vue-chartjs
我正在使用Vue.js和Chart.js绘制一些图表.每次调用该函数时generateChart(),图表都不会自动更新.当我检查数据时generateChart(),它们是正确的,但图表并不代表那些.
有趣的事实:当我调整窗口大小时,图表正在更新.
object？我觉得这将是一些与相关的array和generateChart()变化的检测警告,但我不知道该怎么做.
https://codepen.io/anon/pen/bWRVKB?editors=1010
<el-dialog title="Chart" v-model="showGeneratedChart">
<line-chart :chartData="dataChart"></line-chart>
</el-dialog>
export default{
data (){
const self = this;
return {
dataChart : {
labels : [],
datasets: [{
label: 'label',
backgroundColor: '#FC2525',
data: [0, 1, 2, 3, 4],
}]
}
}
}
generateChart() {
this.dataChart['labels'] = [];
this.dataChart['datasets'] = [];
... compute datasets and formattedLabels
this.dataChart['labels'] = formattedLabels;
this.dataChart['datasets'] = datasets;
}
import { Line, mixins } from 'vue-chartjs'
export default Line.extend({
mixins: [mixins.reactiveProp],
props: ["options"],
mounted () {
this.renderChart(this.chartData, this.options)
}
})
azs*_*s06 24
对图表数据使用计算属性.而不是调用this.renderChart值班包装在一个方法和重复使用方法上mounted和watch.
Vue.component("line-chart", {
extends: VueChartJs.Line,
props: ["data", "options"],
mounted() {
this.renderLineChart();
},
computed: {
chartData: function() {
return this.data;
}
},
methods: {
renderLineChart: function() {
this.renderChart(
{
labels: [
"January",
"February",
"March",
"April",
"May",
"June",
"July"
],
datasets: [
{
label: "Data One",
backgroundColor: "#f87979",
data: this.chartData
}
]
},
{ responsive: true, maintainAspectRatio: false }
);
}
},
watch: {
data: function() {
this._chart.destroy();
//this.renderChart(this.data, this.options);
this.renderLineChart();
}
}
});
var vm = new Vue({
el: ".app",
data: {
message: "Hello World",
dataChart: [10, 39, 10, 40, 39, 0, 0],
test: [4, 4, 4, 4, 4, 4]
},
methods: {
changeData: function() {
this.dataChart = [6, 6, 3, 5, 5, 6];
}
}
});<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Vue.jS Chart</title>
</head>
<body>
<div class="app">
{{ dataChart }}
<button v-on:click="changeData">Change data</button>
<line-chart :data="dataChart" :options="{responsive: true, maintainAspectRatio: false}"></line-chart>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.2.6/vue.min.js"></script>
<script src="https://unpkg.com/vue-chartjs@2.5.7-rc3/dist/vue-chartjs.full.min.js"></script>
</body>
</html>您还可以将选项设置为计算属性,如果选项不会更改,则可以设置默认道具.https://vuejs.org/v2/guide/components.html#Prop-Validation
这是一个工作的codepen https://codepen.io/azs06/pen/KmqyaN?editors=1010
小智 6
我的解决方案是不使用 mixins 并在 prop 上使用手表。
watch: {
chartData: function() {
this.renderChart(this.chartData, this.options);
}
}
但是，除非我像这样更改另一个组件中的图表数据，否则这不起作用：
this.chartData = {
labels: [],
datasets: []
};
this.chartData.labels = labels;
this.chartData.datasets = datasets;
如果我只是替换标签和数据集，手表将不会触发。
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