1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | <template> <div class="circle-progress"> <h2>半环形进度条DEMO</h2> <canvas id="canvas" width="150" height="150"></canvas> <div class="btns"> <van-button @click="toCanvas('canvas', '#ffbf00', 10)">10</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 20)">20</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 30)">30</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 40)">40</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 50)">50</van-button> </div> <div class="btns"> <van-button @click="toCanvas('canvas', '#ffbf00', 60)">60</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 70)">70</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 80)">80</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 90)">90</van-button> <van-button @click="toCanvas('canvas', '#ffbf00', 100)">100</van-button> </div> </div> </template> <script> export default { data() { return { canvas:'', percent:'', ctx:'', circleX:'', circleY:'', radius:'', cradius:'', lineWidth:'', fontSize:'', color:'', process:'', circleLoading:null, }; }, mounted() { this.toCanvas("canvas", "#ffbf00", 80); }, methods: { //两端圆点 smallcircle1(cx, cy, r) { this.ctx.beginPath(); // this.ctx.moveTo(cx + r, cy); this.ctx.lineWidth = 1; this.ctx.fillStyle = "#06a8f3"; this.ctx.arc(cx, cy, r, 0, Math.PI * 2); this.ctx.fill(); }, smallcircle2(cx, cy, r) { this.ctx.beginPath(); //ctx.moveTo(cx + r, cy); this.ctx.lineWidth = 1; this.ctx.fillStyle = "#fff"; this.ctx.arc(cx, cy, r, 0, Math.PI * 2); this.ctx.fill(); }, //画圆 circle(cx, cy, r) { this.ctx.beginPath(); //ctx.moveTo(cx + r, cy); this.ctx.lineWidth = this.lineWidth; this.ctx.strokeStyle = "#eee"; this.ctx.arc(cx, cy, r, (Math.PI * 2) / 3, (Math.PI * 1) / 3); this.ctx.stroke(); }, //画弧线 sector(cx, cy, r, startAngle, endAngle, anti) { this.ctx.beginPath(); //ctx.moveTo(cx, cy + r); // 从圆形底部开始画 this.ctx.lineWidth = this.lineWidth; // 进度条颜色 this.ctx.strokeStyle = this.color; //圆弧两端的样式 this.ctx.lineCap = "round"; //圆弧 this.ctx.arc(cx,cy,r,(Math.PI * 2) / 3,(Math.PI * 2) / 3 + (endAngle / 100) * ((Math.PI * 5) / 3),false); this.ctx.stroke(); }, //刷新 loading(progress) { if (this.process >= this.percent) { clearInterval(this.circleLoading); } //清除canvas内容 this.ctx.clearRect(0, 0, this.circleX * 2, this.circleY * 2); //中间的字 this.ctx.font = "normal bold 40px April"; this.ctx.textAlign = "center"; this.ctx.textBaseline = "middle"; this.ctx.fillStyle = "#ffbf00"; this.ctx.fillText(parseFloat(this.process).toFixed(0), this.circleX, this.circleY-5); this.ctx.font = "normal bold " + this.fontSize + "px April"; this.ctx.fillStyle = "#ffbf00"; if(progress <= 20){ this.ctx.fillText('超极低', this.circleX, this.circleY+30); } if(progress > 20 && progress <= 30){ this.ctx.fillText('极低', this.circleX, this.circleY+30); } if(progress > 30 && progress <= 50){ this.ctx.fillText('低', this.circleX, this.circleY+30); } if(progress > 50 && progress <= 60){ this.ctx.fillText('中等', this.circleX, this.circleY+30); } if(progress > 60 && progress <= 70){ this.ctx.fillText('及格', this.circleX, this.circleY+30); } if(progress > 70 && progress <= 80){ this.ctx.fillText('高', this.circleX, this.circleY+30); } if(progress > 80 && progress <= 90){ this.ctx.fillText('极高', this.circleX, this.circleY+30); } if(progress > 90 && progress <= 100){ this.ctx.fillText('超极高', this.circleX, this.circleY+30); } //圆形 this.circle(this.circleX, this.circleY, this.radius); //圆弧 this.sector(this.circleX, this.circleY, this.radius, (Math.PI * 2) / 3, this.process); //两端圆点 this.smallcircle1( this.cradius + Math.cos(((2 * Math.PI) / 360) * 120) * this.radius, this.cradius + Math.sin(((2 * Math.PI) / 360) * 120) * this.radius, 0 ); this.smallcircle2( this.cradius + Math.cos(((2 * Math.PI) / 360) * (120 + this.process * 3)) * this.radius, this.cradius + Math.sin(((2 * Math.PI) / 360) * (120 + this.process * 3)) * this.radius, 2 ); //控制结束时动画的速度 if (this.process / this.percent > 0.9) { this.process += 0.3; } else if (this.process / this.percent > 0.8) { this.process += 0.55; } else if (this.process / this.percent > 0.7) { this.process += 0.75; } else { this.process += 1.0; } }, /** 生成环形进度条 **/ toCanvas(id, color, progress) { clearInterval(this.circleLoading); //canvas进度条 this.canvas = document.getElementById(id); this.percent = progress //最终百分比 this.ctx = canvas.getContext("2d"); this.circleX = canvas.width / 2; //中心x坐标 this.circleY = canvas.height / 2; //中心y坐标 this.radius = 60; //圆环半径 this.cradius = 75; // canvas半径 this.lineWidth = 6; //圆形线条的宽度 this.fontSize = 16; //字体大小 this.process = 0.0; //进度 this.color = color; if(progress < 50){ this.circleLoading = window.setInterval(() => { this.loading(progress); }, 20); } if(progress >= 50 && progress < 70){ this.circleLoading = window.setInterval(() => { this.loading(progress); }, 10); } if(progress >= 70){ this.circleLoading = window.setInterval(() => { this.loading(progress); }, 6); } } } }; </script> <style lang="less"> .circle-progress{ h2{ color: #ffbf00; margin: 160px 0 60px 0; } .btns{ margin: 20px 0; .van-button--default{ background-color: #ffbf00; color: #fff; } } } </style> |
