QML中组包json数组很多层

在QML中组包JSON数组可以使用JavaScript语法来实现。可以通过循环遍历来逐层构建JSON数组。以下是一个示例：

// 定义一个JSON数组
var data = {
    "items": []
};

// 循环遍历构建JSON数组
for(var i = 0; i < 5; i++) {
    var item = {
        "id": i,
        "name": "item" + i,
        "children": []
    };
    
    // 构建子JSON数组
    for(var j = 0; j < 3; j++) {
        var child = {
            "id": i*10 + j,
            "name": "child" + j
        };
        item.children.push(child);
    }
    
    data.items.push(item);
}

// 输出JSON数组
console.log(JSON.stringify(data));

该示例中构建了一个包含5个元素的JSON数组，每个元素包含一个id、name和children属性，children属性又包含一个3个元素的子JSON数组。输出结果如下：

{
    "items": [
        {
            "id": 0,
            "name": "item0",
            "children": [
                {
                    "id": 0,
                    "name": "child0"
                },
                {
                    "id": 1,
                    "name": "child1"
                },
                {
                    "id": 2,
                    "name": "child2"
                }
            ]
        },
        {
            "id": 1,
            "name": "item1",
            "children": [
                {
                    "id": 10,
                    "name": "child0"
                },
                {
                    "id": 11,
                    "name": "child1"
                },
                {
                    "id": 12,
                    "name": "child2"
                }
            ]
        },
        {
            "id": 2,
            "name": "item2",
            "children": [
                {
                    "id": 20,
                    "name": "child0"
                },
                {
                    "id": 21,
                    "name": "child1"
                },
                {
                    "id": 22,
                    "name": "child2"
                }
            ]
        },
        {
            "id": 3,
            "name": "item3",
            "children": [
                {
                    "id": 30,
                    "name": "child0"
                },
                {
                    "id": 31,
                    "name": "child1"
                },
                {
                    "id": 32,
                    "name": "child2"
                }
            ]
        },
        {
            "id": 4,
            "name": "item4",
            "children": [
                {
                    "id": 40,
                    "name": "child0"
                },
                {
                    "id": 41,
                    "name": "child1"
                },
                {
                    "id": 42,
                    "name": "child2"
                }
            ]
        }
    ]
}

通过循环遍历，可以逐层构建复杂的JSON数组