<!-- style中的主要为了区分已加载好的项和新数据，只有新数据有动画 -->
<view wx:for="{{lists}}" class="common"
 style='opacity:{{index >= (page-1)*2"1"}};margin-left:{{index >= (page-1)*2"0"}}rpx;transition:all {{index >= (page-1)*2"0"}}s;' >
 第{{index}}条
</view>
 
<view bindtap='next' style='position:relative;right:-150px;top:50rpx;'>下一页</view>

page{
 background: #eee
}
.common{
  height: 100rpx;
  opacity: 0;
  margin-left: -50rpx;
  background: #fff;
  margin-top: 20rpx;
  line-height: 100rpx;
  padding: 25rpx;
}

Page({
 data: {
  list: ['啦啦啦', '嚯嚯嚯'],
  lists: ['啦啦啦', '嚯嚯嚯'],
  page:1
 },
 
 onLoad: function (options) {
 
 },
 
 onReady:function(e){
  this.setData({
   op: 1,
   mr:0
  })
 },
 
 next:function(e){
  this.data.page ++;
  //模拟从后台获取到了下一页的数据，附加到原有数组上
  var lists = this.data.lists.concat(this.data.list)
  this.setData({
   lists:lists,
   page: this.data.page,
   op: 0,
   mr: -50
  })
  this.onReady();
 },
})