在iOS中搜索Array（某些模型）字典的数组答案

【问题标题】：Searching Array of dictionary of Array (some model) in iOS在iOS中搜索Array（某些模型）字典的数组
【发布时间】：2018-01-12 09:51:17
【问题描述】：

我有一个关于在数组字典数组中搜索的查询。

我正在调用 Web 服务并从服务器获取响应，响应后我创建了一个模型名称“Merchant Model”并按顺序放置所有数据。

这里是 MerchantModel

struct MerchantModel {
    let idString : UInt
    var squareImageUrlString : String
    let rectangleImageUrlString : String
    let nameString : String
    let stateDescriptionString : String

}

以下是我使用 MerchantModel 从服务创建的数据

    [
        ["D": [MerchantModel(idString: 70000032, squareImageUrlString: "http:wigroup/wiplatform/uploads/2016-09-26_153901_1474904341_68899.png?uid=1474904346379", rectangleImageUrlString: "http://latform/uploads/2016-09-26_153556_1474904156_79221.jpg?uid=1474904164349", nameString: "ABCD ", stateDescriptionString: "Active")]],
        ["K": [MerchantModel(idString: 22, squareImageUrlString: "http://wigroup/wigroup/wiplatform/uploads/2017-01-12_083720_1484210240_77692.jpg?uid=1484210329594", rectangleImageUrlString: "http://r/uploads/2017-01-12_084109_1484210469_83189.jpg?uid=1484210491620", nameString: "ABCD Online", stateDescriptionString: "Active")]],
        ["P": [MerchantModel(idString: 70000013, squareImageUrlString: "http://form/uploads/2016-11-02_093929_1478079569_70996.jpg?uid=1478079577342", rectangleImageUrlString: "http://rad2rm/uploads/2016-11-02_093948_1478079588_71976.jpg?uid=1478079594170", nameString: "XYZ \'n Pay", stateDescriptionString: "Active"), MerchantModel(idString: 70000068, squareImageUrlString: "http://igroup/wiplatform/uploads/2016-08-11_102601_1470911161_64234.png", rectangleImageUrlString: "http://roup/wiplatform/uploads/2016-08-11_102632_1470911192_47769.png", nameString: "XABCD Pay ", stateDescriptionString: "Active")]],
        ["R": [MerchantModel(idString: 19, squareImageUrlString: "http://group/wiplatform/uploads/2015-06-09_133237_1433856757_50883.jpg", rectangleImageUrlString: "http://raads/2015-06-09_133217_1433856737_47358.jpg", nameString: "Test", stateDescriptionString: "Active")]]
]

现在我必须对这个数组执行搜索。我把下面的代码写成

 func filter(array : [[String : [MerchantModel]]], byString filterString : String) -> [[String : [MerchantModel]]]? {
  return array.filter({ (dictData : [String : [MerchantModel]]) -> Bool in
                let values = dictData.values
                values.filter({ ([MerchantModel]) -> Bool in
                    $0.nameString == filterString
                })
            })
    }

但是出现错误

“'[MerchantModel]' 类型的值没有成员 'nameString'”

请建议我如何在这个数组上执行搜索。我试图避免 Swift 中的循环（for、while 等）。

【问题讨论】：

在values.filter({ ([MerchantModel]) -> Bool in $0.nameString == filterString }) $0 中是MerchantModel 的数组。我猜MerchantModel 有一个属性nameString，但[MerchantModel]（一个数组）没有。
尝试向this寻求帮助。希望对您有所帮助。
@Larme 更新了我的问题。

标签： ios swift

【解决方案1】：

替换：

values.filter({ ([MerchantModel]) -> Bool in
    $0.nameString == filterString
})

与：

values.filter({ ([MerchantModel]) -> Bool in
    $0.filter({ (MerchantModel) -> Bool in
        $0.nameString == filterString
    )}
})

【讨论】：

【解决方案2】：

问题是你正在初始化一个对象数组

["D": [MerchantModel(idString: 70000032, squareImageUrlString: "http:wigroup/wiplatform/uploads/2016-09-26_153901_1474904341_68899.png?uid=1474904346379", rectangleImageUrlString: "http://latform/uploads/2016-09-26_153556_1474904156_79221.jpg?uid=1474904164349", nameString: "ABCD ", stateDescriptionString: "Active")]

而不是试图从中获取nameString。

要遍历数组，请使用 smth like

func filter(array : [[String : [NSDictionary]]], byString filterString : String) -> [[String : [NSDictionary]]]? {
    return array.filter({ (dictData : [String : [NSDictionary]]) -> Bool in
        let values = dictData.values
        $0.filter({ (MerchantModel) -> Bool in
            $0.nameString == filterString
        )}
    })
}

【讨论】：

【解决方案3】：

内部过滤器必须返回布尔值。试试这个。

func filter(array : [[String : [MerchantModel]]], byString filterString : String) -> [[String : [MerchantModel]]]? {
    return array.filter { (dictData) -> Bool in
        dictData.values.filter({ (subarray) -> Bool in
            subarray.filter { $0.nameString == filterString }.count > 0
        }).count > 0
    }
}

还有一个班轮

return array.filter { $0.values.filter { $0.filter { $0.nameString == filterString }.count > 0 }.count > 0 }

游乐场测试结果。

let array = [["D": [MerchantModel(idString: 70000032, squareImageUrlString: "http:wigroup/wiplatform/uploads/2016-09-26_153901_1474904341_68899.png?uid=1474904346379", rectangleImageUrlString: "http://latform/uploads/2016-09-26_153556_1474904156_79221.jpg?uid=1474904164349", nameString: "ABCD ", stateDescriptionString: "Active")]],
             ["K": [MerchantModel(idString: 22, squareImageUrlString: "http://wigroup/wigroup/wiplatform/uploads/2017-01-12_083720_1484210240_77692.jpg?uid=1484210329594", rectangleImageUrlString: "http://r/uploads/2017-01-12_084109_1484210469_83189.jpg?uid=1484210491620", nameString: "ABCD Online", stateDescriptionString: "Active")]],
             ["P": [MerchantModel(idString: 70000013, squareImageUrlString: "http://form/uploads/2016-11-02_093929_1478079569_70996.jpg?uid=1478079577342", rectangleImageUrlString: "http://rad2rm/uploads/2016-11-02_093948_1478079588_71976.jpg?uid=1478079594170", nameString: "XYZ \'n Pay", stateDescriptionString: "Active"), MerchantModel(idString: 70000068, squareImageUrlString: "http://igroup/wiplatform/uploads/2016-08-11_102601_1470911161_64234.png", rectangleImageUrlString: "http://roup/wiplatform/uploads/2016-08-11_102632_1470911192_47769.png", nameString: "XABCD Pay ", stateDescriptionString: "Active")]],
             ["R": [MerchantModel(idString: 19, squareImageUrlString: "http://group/wiplatform/uploads/2015-06-09_133237_1433856757_50883.jpg", rectangleImageUrlString: "http://raads/2015-06-09_133217_1433856737_47358.jpg", nameString: "Test", stateDescriptionString: "Active")]]]

let filterString = "ABCD "
if let results = filter(array: array, byString: filterString) {
    print(results)
}

【讨论】：