// pages/jh/jh.js
Page({
data:{
carts: [
{
cid:1008,
title:'小米Note2 全网通 标准版 4GB内存 64GB ROM 亮黑色',
image:'http://m.360buyimg.com/babel/s390x390_jfs/t3544/28/568416609/135582/af801e4f/580f1296N69590b3b.jpg!q50.jpg.webp',
num:'1',
price:'2799',
sum:'2799',
selected:true
},
{
cid:1012,
title:'小米 红米 4X 全网通版 2GB 16GB 香槟金 ',
image:'http://m.360buyimg.com/babel/s390x390_jfs/t4123/339/1784513645/257764/57536ad7/58c6393dNb4dc74a3.jpg!q50.jpg.webp',
num:'1',
price:'699',
sum:'699',
selected:true
},
{
cid:1031,
title:'华为 HUAWEI P10 全网通 4GB 128GB 钻雕金 ',
image:'//m.360buyimg.com/babel/s390x390_jfs/t3061/26/7325903161/213845/ede17d35/58b3f540N721d481b.jpg!q50.jpg.webp',
num:'3',
price:'4288',
sum:'4288',
selected:false
},
{
cid:1054,
title:'荣耀8青春版 全网通 标配版 3GB 32GB 珠光白',
image:'//m.360buyimg.com/babel/s390x390_jfs/t3049/76/7217205525/234314/28806119/58b3a373Nba33c2e8.jpg!q50.jpg.webp',
num:'2',
price:'1099',
sum:'1099',
selected:false
},
{
cid:1063,
title:'OPPO R9s 全网通4G 64G 双卡双待手机 玫瑰金',
image:'//m.360buyimg.com/babel/s390x390_jfs/t3205/222/4061036739/100592/fcec060e/57ff58e6Ne3a0d9c1.jpg!q50.jpg.webp',
num:'1',
price:'2799',
sum:'2799',
selected:true
}
],
minusStatuses: ['disabled', 'disabled', 'normal', 'normal', 'disabled']
},
bindMinus: function(e) {
var index = parseInt(e.currentTarget.dataset.index);//得到下标
var num = this.data.carts[index].num;
// 如果只有1件了,就不允许再减了
if (num > 1) {
num --;
}
// 只有大于一件的时候,才能normal状态,否则disable状态
var minusStatus = num <= 1 ? 'disabled' : 'normal';
// 购物车数据
var carts = this.data.carts;
carts[index].num = num;
// 按钮可用状态
var minusStatuses = this.data.minusStatuses;
minusStatuses[index] = minusStatus;
// 将数值与状态写回
this.setData({
carts: carts,
minusStatuses: minusStatuses
});
this.sum()
},
bindPlus: function(e) {
var index = parseInt(e.currentTarget.dataset.index);
var num = this.data.carts[index].num;
// 自增
num ++;
// 只有大于一件的m时候,才能normal状态,否则disable状态
var minusStatus = num <= 1 ? 'disabled' : 'normal';
// 购物车数据
var carts = this.data.carts;
carts[index].num = num;
// 按钮可用状态
var minusStatuses = this.data.minusStatuses;
minusStatuses[index] = minusStatus;
console.log(minusStatuses[index])
// 将数值与状态写回
this.setData({
carts: carts,
minusStatuses: minusStatuses
});
this.sum()
},
bindCheckbox: function(e) {
//绑定点击事件,将checkbox样式改变为选中与非选中
//拿到下标值,以在carts作遍历指示用
var index = parseInt(e.currentTarget.dataset.index);
//原始的icon状态
var selected = this.data.carts[index].selected;
var carts = this.data.carts;
// 对勾选状态取反
carts[index].selected = !selected;
// 写回经点击修改后的数组
this.setData({
carts: carts
});
this.sum()
},
bindSelectAll: function(e) {
// 环境中目前已选状态
var selectedAllStatus = this.data.selectedAllStatus;
// 取反操作
selectedAllStatus = !selectedAllStatus;
// 购物车数据,关键是处理selected值
var carts = this.data.carts;
// 遍历
for (var i = 0; i < carts.length; i++) {
carts[i].selected = selectedAllStatus;
}
this.setData({
selectedAllStatus: selectedAllStatus,
carts: carts
});
this.sum()
},
bindCheckout: function(e) {
// 初始化toastStr字符串
var toastStr = 'cid:';
// 遍历取出已勾选的cid
for (var i = 0; i < this.data.carts.length; i++) {
if (this.data.carts[i].selected) {
toastStr += this.data.carts[i].cid;
toastStr += ' ';
}
}
//存回data
this.setData({
toastHidden: false,
toastStr: toastStr
});
},
bindToastChange: function(e) {
this.setData({
toastHidden: true
});
},
//总价
sum: function(e) {
var carts = this.data.carts;
// 计算总金额
var total = 0;
for (var i = 0; i < carts.length; i++) {
if (carts[i].selected) {
total += carts[i].num * carts[i].price;
}
}
// 写回经点击修改后的数组
this.setData({
carts: carts,
total: '¥' + (total).toFixed(2)
});
},
onLoad:function(options){
// 页面初始化 options为页面跳转所带来的参数
this.sum()
},
onReady:function(){
// 页面渲染完成
},
onShow:function(){
// 页面显示
},
onHide:function(){
// 页面隐藏
},
onUnload:function(){
// 页面关闭
}
})
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