微信小程序加购动画

Posted 2021-12-19 yw00yw

说明

电商版加购动画，从鼠标点击位置，跳转到指定位置，抛物线

wxml

<view class="good-red-point" wx:if="busShow" style="--startX:bus.sxpx;--startY:bus.sypx;--endX:bus.expx;--endY:bus.eypx;animation:bus.animation;">
    <image src="bus_img"></image>
</view>

js

onShow() 
    // 购物车坐标
    this.busPos = ;
    const _this = this;
    wx.getSystemInfo(
      success: function(res) 
        _this.busPos.x = res.windowWidth * 0.8;
        _this.busPos.y = res.windowHeight;
      
    );
  ,
// 开始加购动画
  joinCartAnimate(ev, img) 
    this.setData( busShow: false, bus: null );
    this.data.animatePrevTime = this.data.animateCurrentTime;
    this.setData(
      busShow: true,
      bus: 
        sx: ev.touches["0"].clientX - 20,
        sy: ev.touches["0"].clientY - 20,
        ex: this.busPos.x,
        ey: this.busPos.y,
        animation: "throwY .4s ease-in, throwX .4s linear, scaleSize .4s linear"
      ,
      bus_img: img
    );
  ,
  // 加入购物车
// 加入购物车
  joinCart(e) 
    const  id, type, activityId, ev, img  = e.detail;
    this.data.animateCurrentTime = Date.now();
    const _this = this;
    if (_this.data.joining) 
      showToast(_this.data.kickFastText);
      return;
    
    const params = 
      sku_id: id,
      number: 1,
      type,
      activity_id: Number(activityId) || 0
    ;
    _this.setData( joining: true );
    addCartApi(params)
      .then(res => 
        _this.setData( joining: false );
        if (res.code === 200) 
          if (
            _this.data.animateCurrentTime - _this.data.animatePrevTime >=
            600
          ) 
            _this.joinCartAnimate(ev, img);
          
          addCart(id, res.data.cart_goods_count);
          // showToast("加入成功", true);
         else 
          showToast(res.message);
        
      )
      .catch(err => 
        _this.setData( joining: false );
        showToast(err.message);
      );
  
);

wxss

.good-red-point
    width: vw(40)
    height: vw(40)
    position: fixed
    z-index: 999999
    overflow: hidden
    border: 1px solid $color-main-8
    border-radius: 50%
    image
      width: 100%
      height: 100%
  .index-content
    padding-bottom: vw(94)

// 定义的动画 animation
@keyframes scaleSize
  0%
    width: vw(40)
    height: vw(40)

  100%
    width: vw(20)
    height: vw(20)
@keyframes throwY
  0%
    top:  var(--startY)
    opacity: 1

  90%
    opacity: .75

  100%
    top: var(--endY)
    opacity: 0

@keyframes throwX
  0%
    left: var(--startX)
    opacity: 1
  90%
    opacity: .75

  100%
    left: var(--endX)
    opacity: 0


@keyframes point
  0%
    margin-top: vw(2)
  50%
    margin-top: vw(10)
  100%
    margin-top: vw(2)

效果