1. wxml
倒计时：
{{t}}
2. wxss
.headpiece-num {
position: absolute;
top: -3rpx;
right: -35rpx;
width: 62rpx;
height: 100%;
text-align: center;}.headpiece-time {
position: relative;
width: 305rpx;}.headpiece-process {
position: relative;
width: 138rpx;
height: 14rpx;
margin-right: 14rpx;
border: 4rpx solid #000;
overflow: hidden;
background: #fff4b2;}.headpiece-process-inner {
position: absolute;
top: 0rpx;
left: 0rpx;
background: #f74242;
height: 100%;
transition: all 0.3s ease-out;}
3. index.js
/**
* 获取系统信息
*/
getSystemInfo: function () {
return new Promise((a, b) => {
wx.getSystemInfo({
success: function (res) {
a(res)
},
fail: function (res) {
b(res)
}
})
})
},
/**
* 进度条动画
*/
countdown: function () {
const requestAnimationFrame = callback => {
return setTimeout(callback, 1000 / 60);
}, cancelAnimationFrame = id => {
clearTimeout(id);
};
this.getSystemInfo().then(v => {
let maxtime = this.data.maxtime,
width = this.data.width,
sTime = +new Date,
_ts = this,
temp,
animate;
(animate = () => {
temp = requestAnimationFrame(() => {
let time = maxtime * 1000,
currentTime = +new Date,
schedule = 1 - (currentTime - sTime) / time,
schedule_1 = schedule <= 0 ? 0 : schedule,
width = parseInt(schedule_1 * 100),
t = parseInt((this.data.maxtime) * schedule_1)+1;
_ts.setData({
width: width,
t:t });
if (schedule <= 0) {
cancelAnimationFrame(temp);
_ts.setData({
width: width,
t: 0
});
return;
} else {
animate();
};
})
})();
});
},
