<view class="i-class img-content">
  <image class="i-class img-def" src="{{defaultImage}}"></image>
  <image binderror="bindError" bindload="imageLoad" bindtap="preview" class="i-class img-def opacity {{isLoad?'show-img':''}}" lazyLoad="{{isLazy}}" mode="aspectFill" src="{{img}}"></image>
</view>