key是数字的对象集合

    let data = {3: '影视', 4: '音乐', 5: '广场舞', 6: '游戏', 7: '综艺', 8: '动漫', 9: '翻唱', 10: '生活', 11: '美食', 12: '亲子'}
    let arr = []
    for (var i in data) {
      let c = {
        id: i,
        label: data[i]
      }
      arr.push(c)
    }
    console.log(arr) // [{id: 3, label: '影视'}, {id: 4, label: '音乐'}, ...]