CSS动画实现领积分效果的思路详解

this.integral.forEach(i => {
    // 角度转化为弧度
    let angle = Math.PI / 180 * this.getRandomArbitrary(90, 270)
    // 根据弧度获取坐标
    i.x = xAxis + 100 * Math.sin(angle)
    i.y = 100 + 100 * Math.cos(angle)
    // 贝塞尔函数
    i.timing = this.timeFun[parseInt(this.getRandomArbitrary(0, 3))]
})

// 求两个数之间的随机数
getRandomArbitrary(min, max) {
    return Math.random() * (max - min) + min;
}

.foo {
    display: flex;
    font-size: 10px;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    position: fixed;
    top: 0;
    left: 0;
    animation-name: slideDown;
    /*默认贝塞尔函数*/
    animation-timing-function: ease-out;
    /*动画时间*/
    animation-duration: 1500ms;
    /*动画循环播放*/
    animation-iteration-count: infinite;
    -moz-box-shadow: -5px -5px 10px 3px rgb(277, 102, 63) inset;
    -webkit-box-shadow: -5px -5px 10px 3px rgb(277, 102, 63) inset;
    box-shadow: -5px -5px 10px 3px rgb(277, 102, 63) inset;
}

/*小积分上下闪烁*/
@keyframes slideDown {
    from {
        transform: translateY(0);
    }
    50% {
        transform: translateY(5px);
        background-color: rgb(255, 234, 170);
    }
    to {
        transform: translateY(0);
        background: rgb(255, 202, 168);
    }
}

this.integralClass.fooClear = true
this.totalClass.totalAdd = true
this.totalText = `${this.totalIntegral}积分`
let count = this.integral.length, timeoutID = null, tasks = [], totalTime = parseInt(1500 / count)
const output = (i) => new Promise((resolve) => {
    timeoutID = setTimeout(() => {
        // 积分递增
        this.totalIntegral += this.integral[i].value
        // 修改响应式属性
        this.totalText = `${this.totalIntegral}积分`
        resolve();
    }, totalTime * i);
})
for (var i = 0; i < 5; i++) {
    tasks.push(output(i));
}
Promise.all(tasks).then(() => {
    clearTimeout(timeoutID)
})

.fooClear {
    animation-name: clearAway;
    animation-timing-function: ease-in-out;
    animation-iteration-count: 1;
    animation-fill-mode: forwards;
    -webkit-animation-duration: 1500ms;
    -moz-animation-duration: 1500ms;
    -o-animation-duration: 1500ms;
    animation-duration: 1500ms;
}

/*清除小的积分*/
@keyframes clearAway {
    to {
        top: 150px;
        left: 207px;
        opacity: 0;
        visibility: hidden;
        width: 0;
        height: 0;
    }
}

.totalAdd {
    animation-name: totalScale;
    animation-timing-function: ease-in-out;
    /*动画只播放一次*/
    animation-iteration-count: 1;
    /*动画停留在最后一个关键帧*/
    animation-fill-mode: forwards;
    -webkit-animation-duration: 1500ms;
    -moz-animation-duration: 1500ms;
    -o-animation-duration: 1500ms;
    animation-duration: 1500ms;
}

@keyframes totalScale {
    50% {
        transform: scale(1.15, 1.15);
        -ms-transform: scale(1.15, 1.15);
        -moz-transform: scale(1.15, 1.15);
        -webkit-transform: scale(1.15, 1.15);
        -o-transform: scale(1.15, 1.15);
    }
    to {
        transform: scale(1, 1);
        -ms-transform: scale(1, 1);
        -moz-transform: scale(1, 1);
        -webkit-transform: scale(1, 1);
        -o-transform: scale(1, 1);
    }
}

// 一键领取积分
aKeyReceive() {
    if (this.unreceivedIntegral.length === 0) {
        return bottomTip("暂无未领积分")
    }
    if (this.userInfo.memberAKeyGet) {
        let param = {
            memberId: this.userInfo.memberId,
            integralIds: this.unreceivedIntegral.map(u => u.id).join(","),
            integralValue: this.unreceivedIntegral.reduce((acc, curr, index, arr) => { return acc + curr.value }, 0)
        }
        this.$refs.resLoading.show(true)
        api.getAllChangeStatus(param).then(res => {
            let data = res.data
            if (data.success) {
                this.getRecordIntegralList()
                this.playIntegralAnim()
            } else {
                bottomTip(data.message)
            }
        }).finally(() => {
            this.$refs.resLoading.show(false)
        })
    } else {
        this.$refs.refPopTip.show()
    }
},
// 领取积分的动画
playIntegralAnim() {
    this.integralClass.fooClear = true
    this.totalClass.totalAdd = true
    this.totalText = `${this.statisticsData.useValue}积分`
    let count = this.unreceivedIntegral.length, timeoutID = null, tasks = [], totalTime = parseInt(1500 / count)
    const output = (i) => new Promise((resolve) => {
        timeoutID = setTimeout(() => {
            this.statisticsData.useValue += this.unreceivedIntegral[i].value
            this.totalText = `${this.statisticsData.useValue}积分`
            resolve();
        }, totalTime * i);
    })
    for (let i = 0; i < count; i++) {
        tasks.push(output(i));
    }
    Promise.all(tasks).then(() => {
        clearTimeout(timeoutID)
    })
}