"tabBar":{
        "color":"#333333",
        "selectedColor":"#2a75f6",
        "backgroundColor":"#f4f1f1",
        "position":"bottom",
        "borderStyle":"white",
        "list":[
            {
                "pagePath":"pages/Home/Home",
                "text":"",
                "iconPath":"static/icon/hands-fill-2.png",
                "selectedIconPath":"static/icon/hands-fill.png"
            },
            {
                "pagePath":"pages/College/College",
                "text":"",
                "iconPath":"static/icon/xueyuan.png",
                "selectedIconPath":"static/icon/xueyuan-2.png"
            },
            {
                "pagePath":"pages/Mine/Log/Log",
                "text":"",
                "iconPath":"static/icon/rizhi-2.png",
                "selectedIconPath":"static/icon/rizhi.png"
            },
            {
                "pagePath":"pages/Mine/Mine",
                "text":"",
                "iconPath":"static/icon/wode.png",
                "selectedIconPath":"static/icon/wode-2.png"
            }
        ],
        "midButton": {
            "width": "60px",
            "height": "60px",
            "iconPath": "static/icon/kongzhitai.png",
            "iconWidth": "40px",
            "text":"控制台",
            "backgroundImage":"static/icon/yuan-2.png"
        }
    },

监听midButton点击事件

        // App.vue 中监听
　　　　　onLaunch: function() {
            // tabbar中间按钮点击事件
            uni.onTabBarMidButtonTap(function(e){
                uni.navigateTo({
                    url: "/pages/Home/Console/Console",
                    animationType: "slide-in-bottom", // 动画类型
                    animationDuration: 150, // 窗口动画持续时间，单位为 ms
                    fail(err) {
                        console.log(err)
                    }
                })
            })
        }