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这篇文章主要介绍“php怎么实现短视频下的圆形进度条”,在日常操作中,相信很多人在php怎么实现短视频下的圆形进度条问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”php怎么实现短视频下的圆形进度条”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
//1、封装在utils中 //底圆条 function floorCir(obj={}){ //参数为obj对象 let id=obj.id?obj.id:null; let x = obj.x?obj.x:null; let y = obj.y?obj.y:null; let radius = obj.radius?obj.radius:null; var cxt_arc = wx.createCanvasContext(id); //寻找id---注意id不要重复 cxt_arc.setLineWidth(6); cxt_arc.setStrokeStyle('#ECECEC'); cxt_arc.setLineCap('round'); cxt_arc.beginPath(); cxt_arc.arc(x, y, radius, 0, 2 * Math.PI, false); cxt_arc.stroke(); cxt_arc.draw(); } /**圆形进度条封装 */ function drawCircle(obj={}){ let evl = obj.evl?obj.evl:null; let id = obj.id?obj.id:null; let x = obj.x?obj.x:null; let y=obj.y?obj.y:null; let radius=obj.radius?obj.radius:null; var crore=evl; //动态生成的分数画圆 let ctx = wx.createCanvasContext(id,this) //一定加this if(varName){ clearInterval(varName); varName = null; } function drawArc(s, e) { // console.log(s); ctx.setFillStyle('white'); ctx.clearRect(0, 0, 120, 120); ctx.draw(); // var x = 60, y = 60, radius = 50; /**设置渐变 */ var gradient = ctx.createLinearGradient(200, 100, 100, 200); gradient.addColorStop("0", "#7CF8BA"); gradient.addColorStop("0.7", "#35B3FF"); gradient.addColorStop("1.0", "#7CF8BA"); ctx.setLineWidth(6); //进度条宽度 ctx.setStrokeStyle(gradient); ctx.setLineCap('round'); ctx.beginPath(); ctx.arc(x, y, radius, s, e, false); ctx.stroke() ctx.draw() } var step = 1, startAngle = 1.5 * Math.PI, endAngle = 0; var animation_interval = 60, n = crore; var animation = function () { if (step <= n) { endAngle = step * 2 * Math.PI / 100 + 1.5 * Math.PI; drawArc(startAngle, endAngle); step++; } else { if(varName){ clearInterval(varName); varName = null } } }; let varName = setInterval(animation, animation_interval); } //2、在应用的js中引入utils import {drawCircle,floorCir} from '/utils/util' //在onLoad中加入 let tmpObj = {}; tmpObj.evl = score; tmpObj.x = 60; tmpObj.y = 60; tmpObj.radius = 50; tmpObj.id = 'canvasArcCir'; drawCircle(tmpObj); //3、在onReady中描绘底圆 onReady: function () { let tmObj={}; tmObj.x = 60; tmObj.y = 60; tmObj.radius = 50; tmObj.id = 'canvasCircle'; floorCir(tmObj) }, //4、在wxml中 <view class="circle-box"> <canvas class="circle" style=" width:120px; height:120px;" canvas-id="canvasCircle"></canvas> <canvas class="circle" style="width:120px; height:120px;" canvas-id="canvasArcCir"></canvas> <view class="draw_btn" bindtap="drawCircle"><text class="score">{{list.fraction}}</text>分</view> </view> //5、css样式 /*圆环进度条文字*/ .circle_info{ position: absolute; width: 100%; left: 50%; top: 50%; transform: translate(-50%,-50%); display: flex; align-items: center; justify-content: center } .circle_dot{ width:16rpx; height: 16rpx; border-radius: 50%; background-color: #fb9126; } .circle_txt{ padding-left: 10rpx; color: #fff; font-size: 36rpx; letter-spacing: 2rpx; }
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