微信小程序 点击卡片切换 动画效果

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正文：

html

<view class='aa'><image animation="{{animationData0}}" class='img0' style='z-index: {{index_0}};' bindtap='bindtap_img' id='0' src="{{clubs[0].image}}"></image><image animation="{{animationData1}}" class='img1' style='z-index: {{index_1}};' bindtap='bindtap_img' id='1' src="{{clubs[1].image}}"></image><image animation="{{animationData2}}" class='img2' style='z-index: {{index_2}};' bindtap='bindtap_img' id='2' src="{{clubs[2].image}}"></image>
</view><view class='is_height_1' id="is_height_1" style='height:120rpx;width:300rpx;'></view>
<view id="is_height_2" style='height:380rpx;width:200rpx;'></view>

css

page{background: #3B4595
}
.aa{position: relative;margin-top: 50rpx;
}
.img0{border-radius: 5rpx;position: absolute;left:180rpx;width: 375rpx;height: 230rpx;}
.img1{border-radius: 5rpx;position: absolute;left: 60rpx;width: 240rpx;height: 150rpx;top: 40rpx;
}
.img2{border-radius: 5rpx;position: absolute;left: 440rpx;width: 240rpx;height: 150rpx;top: 40rpx;
}

js

var is_1_height, is_1_width, is_2_height, is_2_width, is_img0_width, is_img0_height, is_img1_width, is_img1_height;
var item = 0;
var fangxiang;
Page({data: {index_0: 3,clubs: [{ image: 'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1532684585498&di=39c818a83b5f9d295a662dc9cb3deb4a&imgtype=0&src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F0117e2571b8b246ac72538120dd8a4.jpg%401280w_1l_2o_100sh.jpg' }, { image: 'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1532684585498&di=03509b946c2086ab814276a076ec9069&imgtype=0&src=http%3A%2F%2Fimg07.tooopen.com%2Fimages%2F20170316%2Ftooopen_sy_201956178977.jpg' }, { image: 'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1532684585497&di=d3bb16864ad73dfedc225209a218ed74&imgtype=0&src=http%3A%2F%2Fwww.qqma.com%2Fimgpic2%2Fcpimagenew%2F2018%2F4%2F5%2F6e1de60ce43d4bf4b9671d7661024e7a.jpg' }]},onShow: function () {this.animation1 = this.animation2 = this.animation0 = wx.createAnimation({duration: 600,timingFunction: 'ease',})},bindtap_img: function (e) {var that = this;switch (item) {case 0:if (e.target.id == 0) {this.setData({index_0: 3,})item = 0;} else if (e.target.id == 1) {this.setData({index_2: 0,index_0: 2,index_1: 3,})fangxiang = 'right';item = 1;} else if (e.target.id == 2) {this.setData({index_1: 0,index_0: 2,index_2: 3,})fangxiang = 'left';item = 2}break;case 1:if (e.target.id == 0) {this.setData({index_2: 0,index_1: 2,index_0: 3,})item = 0} else if (e.target.id == 1) {this.setData({index_1: 3,})fangxiang = 'right';item = 1} else if (e.target.id == 2) {this.setData({index_0: 0,index_1: 2,index_2: 3,})fangxiang = 'left';item = 2}break;case 2:if (e.target.id == 0) {this.setData({index_0: 3,index_2: 2,index_1: 0,})item = 0} else if (e.target.id == 1) {this.setData({index_0: 0,index_2: 2,index_1: 3,})fangxiang = 'right';item = 1} else if (e.target.id == 2) {this.setData({index_2: 3,})fangxiang = 'left';item = 2}break;default:console.log('11111')}if (e.target.id == 1) {// 先旋转同时放大，然后平移this.animation0.scale(is_img1_width / is_img0_width, is_img1_height / is_img0_height).translateX(is_1_width).step()this.setData({animationData0: this.animation0.export(),})this.animation1.scale(is_img0_width / is_img1_width, is_img0_height / is_img1_height).translateX(is_1_height).step()this.setData({animationData1: this.animation1.export(),})this.animation2.scale(1, 1).translateX(-is_2_height).step()this.setData({animationData2: this.animation2.export(),})} else if (e.target.id == 2) {// 先旋转同时放大，然后平移this.animation0.scale(is_img1_width / is_img0_width, is_img1_height / is_img0_height).translateX(-is_1_width).step()this.setData({animationData0: this.animation0.export(),})this.animation1.scale(1, 1).translateX(is_2_height).step()this.setData({animationData1: this.animation1.export(),})this.animation2.scale(is_img0_width / is_img1_width, is_img0_height / is_img1_height).translateX(-is_1_height, is_2_width).step()this.setData({animationData2: this.animation2.export(),})} else if (e.target.id == 0) {// 先旋转同时放大，然后平移this.animation0.scale(1, 1).translateX(0).step()this.setData({animationData0: this.animation0.export(),})this.animation1.scale(1, 1).translateX(0).step()this.setData({animationData1: this.animation1.export(),})this.animation2.scale(1, 1).translateX(0).step()this.setData({animationData2: this.animation2.export(),})}var clubs = this.data.clubs;this.setData({index: e.target.id,current: clubs[e.target.id]})},onLoad: function (options) {wx.createSelectorQuery().select('#is_height_1').boundingClientRect(function (rect) {is_1_width = Number(rect.width)is_1_height = Number(rect.height)  // 节点的宽度}).exec();wx.createSelectorQuery().select('#is_height_2').boundingClientRect(function (rect) {is_2_width = Number(rect.width)  // 节点的宽度is_2_height = Number(rect.height)  // 节点的宽度}).exec();wx.createSelectorQuery().select('.img0').boundingClientRect(function (rect) {is_img0_width = Number(rect.width)  // 节点的宽度is_img0_height = Number(rect.height)  // 节点的宽度console.log(is_img0_width)}).exec();wx.createSelectorQuery().select('.img1').boundingClientRect(function (rect) {is_img1_width = Number(rect.width)  // 节点的宽度is_img1_height = Number(rect.height)  // 节点的宽度}).exec();},
})