微信小程序开发之五星评分

<block wx:for="{{stars}}">
<image class="star-image" style="left: {{item*150}}rpx" src="{{key > item ?(key-item == 0.5?halfSrc:selectedSrc) : normalSrc}}">
<view class="item" style="left:0rpx" data-key="{{item+0.5}}" bindtap="selectLeft"></view>
<view class="item" style="left:75rpx" data-key="{{item+1}}" bindtap="selectRight"></view>
</image>
</block>

.star-image {
position: absolute;
top: 50rpx;
width: 150rpx;
height: 150rpx;
src: "../../images/normal.png";
}

.item {
position: absolute;
top: 50rpx;
width: 75rpx;
height: 150rpx;
}

//index.js
//CSDN微信小程序开发专栏:http://blog.csdn.net/column/details/13721.html
//获取应用实例
var app = getApp()
Page({
data: {
stars: [0, 1, 2, 3, 4],
normalSrc: '../../images/normal.png',
selectedSrc: '../../images/selected.png',
halfSrc: '../../images/half.png',
key: 0,//评分
},
onLoad: function () {
},
//点击右边,半颗星
selectLeft: function (e) {
var key = e.currentTarget.dataset.key
if (this.data.key == 0.5 && e.currentTarget.dataset.key == 0.5) {
//只有一颗星的时候,再次点击,变为0颗
key = 0;
}
console.log("得" + key + "分")
this.setData({
key: key
})

},
//点击左边,整颗星
selectRight: function (e) {
var key = e.currentTarget.dataset.key
console.log("得" + key + "分")
this.setData({
key: key
})
}
})