微信小程序给当前选中项添加选中样式

1、wxml

<view wx:for="{{array}}" wx:for-item="{{item}}">
<view class='taskTitle {{showId == item.id ? "active" : ""}}' data-id="{{item.id}}" bindtap='dealTap'>{{item.name}}</view>
</view>

2、js

data:{
showId: 0
},
dealTap: function(e){
var id = e.currentTarget.dataset.id;
this.setData({
showId: id
});
},