tabbar在微信小程序模拟器中显示正常，但是真机调试显示错误

"tabBar": {  
            "color": "#cdcdcd",  
            "selectedColor": "#39cffc",  
            "borderStyle": "black",  
            "backgroundColor": "#ffffff",  
            "list": [{  
                    "pagePath": "pages/firstPage/firstPage",  
                    "iconPath": "static/icon/index.png",  
                    "selectedIconPath": "static/icon/index.png",  
                    "text": "总账"  
                }, {  
                    "pagePath": "pages/sum/sum",  
                    "iconPath": "static/icon/2.png",  
                    "selectedIconPath": "static/icon/2.png",  
                    "text": "统计"  
                },  
                {  
                    "pagePath": "pages/account/account",  
                    "iconPath": "static/icon/3.png",  
                    "selectedIconPath": "static/icon/3.png",  
                    "text": "账户"  
                }, {  
                    "pagePath": "pages/firstPage/firstPage",  
                    "iconPath": "static/icon/4.png",  
                    "selectedIconPath": "static/icon/4.png",  
                    "text": "修改信息"  
                }  
            ]  
        }

代码很简单，就是这样一个tabbar，在模拟器中显示正常，但是真机显示错误，手机是安卓，小米mix2s