uniapp -- tabBar_unapp tabbar 排序

tabBar : 底部tab切换

1. 当设置 position 为 top 时，将不会显示 icon。
2. tabBar 中的 list 是一个数组，只能配置最少2个、最多5个 tab，tab 按数组的顺序排序。
3. 代码跳转到 tabbar 页面，只能使用uni.switchTab，不能使用uni.navigateTo、uni.redirectTo；使用navigator组件跳转时必须设置open-type="switchTab"。
4. navigationStyle : 导航栏样式，仅支持 default/custom。custom即取消默认的原生导航栏。（用uniapp开发小程序时必须取消默认导航栏）。
5. enablePullDownRefresh ：是否开启下拉刷新。

在page.json中添加以下代码：

{
	"easycom": {
		"^u-(.*)": "uview-ui/components/u-$1/u-$1.vue"
	},
	"pages": [
		{
			"path": "pages/index/index",
			"style": {
				"navigationBarTitleText": "首页",
				"enablePullDownRefresh": false,
				"navigationStyle": "custom"
			}
		},
		{
			"path": "pages/my/index",
			"style": {
				"navigationBarTitleText": "我的",
				"enablePullDownRefresh": false,
				"navigationStyle": "custom"
			}
		}
    ],
	"globalStyle": {
		"navigationBarTextStyle": "black",
		"navigationBarTitleText": "uni-app",
		"navigationBarBackgroundColor": "#F8F8F8",
		"backgroundColor": "#F8F8F8",
		"app-plus": {
			"background": "#efeff4"
		}
	},
	"tabBar": {
		"color": "#999999",
		"selectedColor": "#000000",
		"backgroundColor": "#ffffff",
		"list": [{
			"pagePath": "pages/index/index",
			"iconPath": "static/image/icon-index.png",
			"selectedIconPath": "static/image/icon-index-active.png",
			"text": "首页"
		}, {
			"pagePath": "pages/my/index",
			"iconPath": "static/image/icon-my.png",
			"selectedIconPath": "static/image/icon-my-active.png",
			"text": "我的"
		}]
	}
}