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import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
let lifeData = {};
try{
// 尝试获取本地是否存在lifeData变量第一次启动APP时是不存在的
lifeData = uni.getStorageSync('lifeData');
}catch(e){
}
// 需要永久存储且下次APP启动需要取出的在state中的变量名
let saveStateKeys = ['vuex_user', 'vuex_token'];
// 保存变量到本地存储中
const saveLifeData = function(key, value){
// 判断变量名是否在需要存储的数组中
if(saveStateKeys.indexOf(key) != -1) {
// 获取本地存储的lifeData对象将变量添加到对象中
let tmp = uni.getStorageSync('lifeData');
// 第一次打开APP不存在lifeData变量故放一个{}空对象
tmp = tmp ? tmp : {};
tmp[key] = value;
// 执行这一步后所有需要存储的变量都挂载在本地的lifeData对象中
uni.setStorageSync('lifeData', tmp);
}
}
const store = new Vuex.Store({
state: {
// 如果上面从本地获取的lifeData对象下有对应的属性就赋值给state中对应的变量
// 加上vuex_前缀是防止变量名冲突也让人一目了然
vuex_user: lifeData.vuex_user ? lifeData.vuex_user : {name: '明月'},
vuex_token: lifeData.vuex_token ? lifeData.vuex_token : '',
// 如果vuex_version无需保存到本地永久存储无需lifeData.vuex_version方式
vuex_version: '1.0.1',
vuex_demo: '绛紫',
// 自定义tabbar数据
vuex_tabbar: [{
iconPath: "/static/uview/example/component.png",
selectedIconPath: "/static/uview/example/component_select.png",
text: '组件',
pagePath: '/pages/example/components'
},
{
iconPath: "/static/uview/example/js.png",
selectedIconPath: "/static/uview/example/js_select.png",
text: '工具',
midButton: true,
pagePath: '/pages/example/js'
},
{
iconPath: "/static/uview/example/template.png",
selectedIconPath: "/static/uview/example/template_select.png",
text: '模板',
pagePath: '/pages/example/template'
}
]
},
mutations: {
$uStore(state, payload) {
// 判断是否多层级调用state中为对象存在的情况诸如user.info.score = 1
let nameArr = payload.name.split('.');
let saveKey = '';
let len = nameArr.length;
if(len >= 2) {
let obj = state[nameArr[0]];
for(let i = 1; i < len - 1; i ++) {
obj = obj[nameArr[i]];
}
obj[nameArr[len - 1]] = payload.value;
saveKey = nameArr[0];
} else {
// 单层级变量在state就是一个普通变量的情况
state[payload.name] = payload.value;
saveKey = payload.name;
}
// 保存变量到本地,见顶部函数定义
saveLifeData(saveKey, state[saveKey])
}
}
})
export default store

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