本文实例为大家分享了小程序自定义圆形进度条的具体代码，供大家参考，具体内容如下
circle.wxss:
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page { width: 100%; height: 100%; background-color: #fff;} .circle-box { text-align: center; margin-top: 10vw;}.circle { position: absolute; left: 0; right: 0; margin: auto;}.draw_btn { width: 35vw; position: absolute; top: 33vw; right: 0; left: 0; margin: auto; border: 1px #000 solid; border-radius: 5vw;} |
circle.wxml:
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<view class="wrap"> <view class="circle-box"> <canvas class="circle" style="z-index: -99; width:200px; height:200px;" canvas-id="canvasCircle"> </canvas> <canvas class="circle" style="width:200px; height:200px;" canvas-id="canvasArcCir"> </canvas> <view class="draw_btn"> <view>80分</view> <view>(满分100分)</view> </view> </view></view> |
circle.js:
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// pages/circle/circle.js//获取应用实例const app = getApp()var ctx = wx.createCanvasContext('canvasArcCir');Page({ /** * 页面的初始数据 */ data: { }, drawCircle: function() { function drawArc(s, e) { ctx.setFillStyle('white'); ctx.clearRect(0, 0, 200, 200); ctx.draw(); var x = 100, y = 100, radius = 96; ctx.setLineWidth(5); ctx.setStrokeStyle('#d81e06'); ctx.setLineCap('round'); ctx.beginPath(); //圆心的 x,y坐标,radius半径 s:起始弧度，单位弧度（在3点钟方向） e:终止弧度,:false弧度的方向是否是逆时针 ctx.arc(x, y, radius, s, e, false); ctx.stroke() ctx.draw() } var step = 70, startAngle = 1.5 * Math.PI, endAngle = 0, n = 100, endAngle = step * 2 * Math.PI / n + 1.5 * Math.PI; drawArc(startAngle, endAngle); }, /** * 生命周期函数--监听页面加载 */ onLoad: function(options) { //调用画圆的方法 this.drawCircle() }, /** * 生命周期函数--监听页面初次渲染完成 */ onReady: function() { //创建并返回绘图上下文context对象。 var cxt_arc = wx.createCanvasContext('canvasCircle'); cxt_arc.setLineWidth(6); cxt_arc.setStrokeStyle('#eaeaea'); cxt_arc.setLineCap('round'); cxt_arc.beginPath(); cxt_arc.arc(100, 100, 96, 0, 2 * Math.PI, false); cxt_arc.stroke(); cxt_arc.draw(); },}) |
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://blog.csdn.net/wjswangjinsheng/article/details/102466828
