tabBar，底部三个tab，对应三个页面，创建投票，关于锋哥，我的。
新建三个页面

pages.json 页面定义

"pages": [ //pages数组中第一项表示应用启动页，参考：https://uniapp.dcloud.io/collocation/pages
		{
			"path": "pages/create/create",
			"style": {
				"navigationBarTitleText": "java1234-微投票"
			}
		},
		{
			"path": "pages/author/author",
			"style": {
				"navigationBarTitleText": "关于峰哥"
			}
		},
		{
			"path": "pages/my/my",
			"style": {
				"navigationBarTitleText": "我的"
			}
		}
	],

tabBar定义 -注意iconPath文件

,
	"tabBar": {
		"color":"#4D4D4D",
		"selectedColor":"#13227a",
		"backgroundColor":"#FFFFFF",
		"borderStyle":"black",
		"position":"bottom",
		"list": [
			{
				"text": "创建",
				"pagePath": "pages/create/create",
				"iconPath": "static/tabbar/icon/_create.png",
				"selectedIconPath": "static/tabbar/icon/create.png"
			},
			{
				"text": "关于锋哥",
				"pagePath": "pages/author/author",
				"iconPath": "static/tabbar/icon/_author.png",
				"selectedIconPath": "static/tabbar/icon/author.png"
			},
			{
				"text": "我的",
				"pagePath": "pages/my/my",
				"iconPath": "static/tabbar/icon/_my.png",
				"selectedIconPath": "static/tabbar/icon/my.png"
			}
		]
	}