multiArray:

[

    {

    type: “文科”,

    name: [“语文”, “英语”, “日语”, “政治”, “历史”, “地理”],

    },

    {

    type: “理科”,

    name: [“数学”, “物理”, “化学”, “生物”],

    },

    {

    type: “体育”,

    name: [“篮球”, “足球”, “游泳”],

    },

    {

    type: “艺术”,

    name: [“唱歌”, “吉他”, “钢琴”, “古筝”, “打鼓”, “舞蹈”, “画画”],

    },

]

用picker 两列选择器怎么写，手册给那个例子太复杂了，求帮忙