tabBar 去掉文字后 在模拟器上 y轴是居中的，真机上没有垂直居中

• 当前 Bug 的表现（可附上截图）

• 预期表现

代码片段

“tabBar”: {

“selectedColor”: “#8eb6cf”,

“list”: [

{

“pagePath”: “pages/index/index”,

“iconPath”: “/images/home.png”,

“selectedIconPath”: “/images/home@.png”,

“text”: “”

},

{

“pagePath”: “pages/cart/cart”,

“iconPath”: “/images/cart.png”,

“selectedIconPath”: “/images/cart@.png”,

“text”: “”

},

{

“pagePath”: “pages/user/user”,

“iconPath”: “/images/me.png”,

“selectedIconPath”: “/images/me@.png”,

“text”: “”

}

]

}