E_WeChat/custom-tab-bar/index.js

const _Http = getApp().globalData.http;
Component({
	lifetimes: {
		ready: function () {
			if (this.data.count == 1) return;
			if (wx.getStorageSync('userauth') != 0) {
				//判断页面 以免一直触发
				const pages = getCurrentPages(),
					prevPage = pages[pages.length - 1];
				if (prevPage.route == 'pages/login/selectSite' || prevPage.route.includes('pages/tabbar/')) this.setData({
					Permission: ['首页', '信息', '我的']
				})
			}
		},
	},
	data: {
		active: 'home',
		Permission: ['首页', '信息', '我的'], //可看模块
		tabbarList: [{
				icon: 'icon-a-biaoqianlanshouyexuanzhong',
				acicon: 'icon-a-biaoqianlanshouyexuanzhong',
				text: '首页',
				url: '/pages/tabbar/home/index',
				name: 'home'
			},
			{
				icon: 'icon-a-biaoqianlanxiaoxi',
				acicon: 'icon-a-biaoqianlanxiaoxixuanzhong',
				text: '信息',
				url: '/pages/tabbar/message/index',
				name: 'message'
			},
			{
				icon: 'icon-a-biaoqianlanwode',
				acicon: 'icon-a-biaoqianlanwodexuanzhong',
				text: '我的',
				url: '/pages/tabbar/mine/index',
				name: 'mine'
			}
		],
	},
	methods: {
		onChange(event) {
			let active = event.detail,
				obj = this.data.tabbarList.find(v => v.name == active);
			wx.switchTab({
				url: obj.url
			});
			this.setData({
				active
			});
		},
		init() {
			const page = getCurrentPages().pop();
			let obj = this.data.tabbarList.find(item => item.url === `/${page.route}`);
			this.setData({
				active: obj.name
			});
			//socket
			if (!getApp().globalData.socketEstablish) getApp().initSocket();
			if (!getApp().globalData.socketCallback) getApp().globalData.socketCallback = this.unReadMessageCount.bind(this);
			this.setUnReadMessageCount(getApp().globalData.fcount);
		},
		/* 设置未读数量 */
		setUnReadMessageCount(fcount) {
			let i = this.data.tabbarList.findIndex(v => v.text == '信息');
			this.setData({
				[`tabbarList[${i}].fcount`]: fcount
			})
		},
		/* 更新信息数量 */
		unReadMessageCount() {
			_Http.basic({
				"classname": "system.message.Message",
				"method": "unReadMessageCount",
				"content": {
					nocache: true
				}
			}, false).then(res => {
				console.log('信息数量', res)
				if (res.msg != '成功') return;
				let fcount = res.data.fcount > 99 ? '99+' : res.data.fcount;
				if (res.data.fcount == 0) fcount = "";
				getApp().globalData.fcount = fcount;
				this.setUnReadMessageCount(fcount);
			})
		}
	},
})