【报Bug】tabbar的iconPath传入相对路径或base64格式的图片时会导致编译后的路径出错

分类：uni-app

uniapp bug已确认

详细问题描述

在src/pages.json文件中配置tabBar时，如果iconPath传入了一个相对路径或者是base64数据的时候，编译后的图片路径是错误的

重现步骤

[步骤]

`pages.json`  
...  
{  
    "tabBar": {  
        ...  
        "list" : [  
            {  
                  "pagePath": "pages/page1",  
                  "iconPath": "./static/img/tabBar/iconA1.png",  
                  "selectIconPath": "./static/img/tabBar/iconA2.png",  
            },  
            {  
                  "pagePath": "pages/page2",  
                  "iconPath": "data:image/png;base64,iVBORw0KGgoAxxxxxxx=",  
                  "selectIconPath": "data:image/png;base64,iVBORw0KGgoAxxxxxxx=",  
            },  
        ]  
        ...  
    }  
}  
...

[结果]

使用上面的pages.json中的tabBar配置，会导致编译出来的图片路径是错误的

page1的icon路径：编译后的结果为/./static/img/tabBar/iconA1.png，正确结果应为：./static/img/tabBar/iconA.png
page1的icon路径：编译后的结果为/data:image/png;base64,iVBORw0KGgoAxxxxxxx=，正确结果应为：data:image/png;base64,iVBORw0KGgoAxxxxxxx=

[期望]
期望能正确展示图片路径

uni-app运行环境说明

{  
    "@dcloudio/uni-app-plus": "^2.0.0-26920200409002",  
    "@dcloudio/uni-h5": "^2.0.0-26920200409002",  
    "@dcloudio/uni-helper-json": "*",  
    "@dcloudio/uni-mp-alipay": "^2.0.0-26920200409002",  
    "@dcloudio/uni-mp-baidu": "^2.0.0-26920200409002",  
    "@dcloudio/uni-mp-qq": "^2.0.0-26920200409002",  
    "@dcloudio/uni-mp-toutiao": "^2.0.0-26920200409002",  
    "@dcloudio/uni-mp-weixin": "^2.0.0-26920200409002",  
    "@dcloudio/uni-stat": "^2.0.0-26920200409002"  
}

BUG 产生位置

@dcloudio\uni-h5\src\platforms\h5\components\app\tabBar.vue第222-224行

_getRealPath (filePath) {  
  // ↓↓↓↓↓ 多余的 ↓↓↓↓  
  if (filePath.indexOf('/') !== 0) {  
    filePath = '/' + filePath  
  }  
  // ↑↑↑↑↑ 多余的 ↑↑↑↑  
  return getRealPath(filePath)  
},