wang_zhuang_daping/src.mobile/store/modules/layout.js

const state = {
    title: '统计报表',
    level: 0,
    value: ''
}

const mutations = {
    SET_TITLE: (state, title) => {
        state.title = title
    },
    SET_LEVEL: (state, level) => {
        state.level = level
    },
    SET_VALUE: (state, value) => {
        state.value = value
    }
}

const levels = ['统计报表', '数据详情']

const actions = {
    init({ commit, state }, payload) {
        return new Promise((resolve, reject) => {
            commit('SET_TITLE', levels[0])
            commit('SET_LEVEL', 0)
        })
    },
    next({ commit, state }, payload) {
        return new Promise((resolve, reject) => {
            const level = state.level + 1
            commit('SET_TITLE', levels[level])
            commit('SET_LEVEL', level)
            resolve(level)
        })
    },
    pre({ commit, state }, payload) {
        return new Promise((resolve, reject) => {
            const level = state.level - 1
            commit('SET_TITLE', levels[level])
            commit('SET_LEVEL', level)
            resolve(level)
        })
    },
    gValue({ commit, state }, payload) {
        return new Promise((resolve, reject) => {
            commit('SET_VALUE', payload)
            resolve()
        })
    }
}

export default {
    namespaced: true,
    state,
    mutations,
    actions
}