微信小程序的点击添加样式，选择多个

<view class="{{ item.ischecked? 'active':'link'}}" wx:for="{{goods}} wx:key='index' bindtap="btn" data-index="{{index}}">

btn(e) {

var that = this

var goods= this.data.goods

var index = e.currentTarget.dataset.index

if (goods[index].ischecked==true) {

goods[index].ischecked = false

} else {

goods[index].ischecked = true

}

that.setData({

goods: goods

})

}