这是添加tab栏的代码：
{
                    "id": "tabBar1",
                    "styles": {
                        "bottom": "0px",
                        "left": "0",
                        "height": "50px",
                        "width": "33%",
                        "backgroundColor": "#f7f7f7"
                    },
                    "tags": [
                        {
                            "tag": "font",
                            "id": "tabBar11",
                            "text": "\ue500",
                            "position": {
                                "top": "4px",
                                "left": "0",
                                "width": "100%",
                                "height": "24px"
                            },
                            "textStyles": {
                                "fontSrc": "_www/fonts/mui.ttf",
                                "align": "center",
                                "size": "24px"
                            }
                        }, {
                            "tag": "font",
                            "id": "tabBar12",
                            "text": "热映",
                            "position": {
                                "top": "23px",
                                "left": "0",
                                "width": "100%",
                                "height": "24px"
                            },
                            "textStyles": {
                                "align": "center",
                                "size": "10px"
                            }
                        }
                    ]
                },