uni-app tabBar 不显示图片并且找不到图片

"tabBar": {  
    "color": "#333",  
    "selectedColor": "deepskyblue",   
    "backgroundColor": "white",   
    "borderStyle": "white",   
    "list": [   
        {  
            "pagePath": "pages/index/index",  
            "iconPath": "/image/tab_1.png",  
            "selectedIconPath": "/image/tab_1.png",  
            "text": "首页"  
        },  
        {  
            "pagePath": "pages/List/List",  
            "iconPath": "/image/tab_2.png",  
            "selectedIconPath": "/image/tab_2.png",  
            "text": "品牌"  
        },  
        {  
            "pagePath": "pages/CenterList/CenterList",  
            "iconPath": "/image/tab_3.png",  
            "selectedIconPath": "/image/tab_3.png",  
            "text": "积分商城"  
        },  
        {  

            "pagePath": "pages/Center/Center",  
            "iconPath": "/image/tab_4.png",  
            "selectedIconPath": "/image/tab_4.png",  
            "text": "我的"  
        }  
    ]  
},