如何过滤嵌套的 SwiftyJSON 数组

Question

我有一个嵌套了多个级别的 SwiftyJSON 数组，我需要根据最低级别的值过滤数组。下面是一个数组的例子。我需要在 Active == true 上过滤它。最有效的方法是什么？

var colors = JSON([
"Apple" : [
        "Yellow" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ],
        "Red" : [
            "Active" : false,
            "Working" : true,
            "Value" : 0
        ]
],
"Banana" : [
        "Blue" : [
            "Active" : false,
            "Working" : true,
            "Value" : 0
        ],
        "Green" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
]
])

期望的输出：

"Apple" : [
        "Yellow" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
],
"Banana" : [
        "Green" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
]

Answer 1

您可以创建一个循环来读取所有颜色，并在该循环内创建一个循环来读取第二个数组中的其他项目。第二个是检查项目是否有效并将其保存在另一个数组中

let activeItems = []

for item in colors {
   for i in item as NSDictionary {
      if i.objectForKey("Active") == true {
         activeItems.addObject(i)
      }
   }
}

Answer 2

        var result = [String:[String:JSON]]()
        for (key, json) in colors.dictionaryValue {
            let filtered = json.dictionaryValue.filter{[=10=].1["Active"].boolValue}
            guard filtered.count > 0 else { continue }

            var subDic = [String:JSON]()
            filtered.forEach{subDic[[=10=].0] = [=10=].1}
            result[key] = subDic
        }
        print(result)

Answer 3

看看这个

var filteredArray = [JSON]()

for item in colors {
    for subItem in item.1 {
        if subItem.1["Active"].boolValue {
           filteredArray.append(JSON([item.0:JSON([subItem.0:subItem.1])]))
        }
    }
}

print(filteredArray)

输出是过滤子字典的字典数组，Active 为真：

[{
  "Apple" : {
    "Yellow" : {
      "Working" : true,
      "Value" : 0,
      "Active" : true
    }
  }
}, {
  "Banana" : {
    "Green" : {
      "Working" : true,
      "Value" : 0,
      "Active" : true
    }
  }
}]

如何过滤嵌套的 SwiftyJSON 数组

How to filter a nested SwiftyJSON array

json

swift

swifty-json