Question

我有一组Business对象。每个Business对象都包含一个键值对数组，其中一个元素可以是ContentBlocks对象的嵌套数组。

var masterArray = [
        Business(busName: "Dave's Cafe", busId: 1, website: "http://www.davescafe.com", latLong: (45.541, -45.609),
            actions: [["title": "About Us", "contentId": "123", "actionType": "content"],
                ["title": "Website", "url": "http://www.davescafe.com", "actionType": "web"]],
            contentBlocks:[
                ContentBlock(busName: "Dave's Cafe", busId: 1, contentId: "123", title: "Testola!", body: "Hello there!")
            ]),
        Business(busName:...
]

我可以使用以下内容过滤数组以返回与唯一busId匹配的特定商家：

let rtnArray = masterArray.filter{$0.busId == id}
    if rtnArray.count == 1{
        return rtnArray[0]
    } else {
        return // feedback that no matches were found
    }

此外，我想通过过滤唯一的contentId来返回特定的contentBlock（如果有必要，我也可以通过商家'{owner}'的busId）。我真的很努力向前迈进，所以任何正确方向的指针都会很棒。

Answer 1

以下是我认为您要问的解决方案：

 var contentBlocks = masterArray
                         .flatMap{$0.contentBlocks}
                         .flatMap{$0}
                         .filter{$0.contentId == "123"}

从所有[ContentBlock]个对象中输出包含与过滤器匹配的所有ContentBlock个对象的Business。

第一个flatMap将Business es列表变为[ContentBlock?]
flatMap将[ContentBlock?]展平为[ContentBlock]
[ContentBlock]已过滤

Answer 2

试试这个：

// The busId and contentId you want to find
let busId = 1
let contentId = "123"

let contentBlocks = masterArray.flatMap {
    $0.contentBlocks.filter { $0.busId == busId && $0.contentId == contentId }
}

Answer 3

在处理模型时，要搜索类的嵌套自定义对象。

这是课程示例。

public final class Model1  {
// MARK: Properties

public var firstname: String?
public var lastname: String?
public var email: String?
public var availabilities: [Availability]?
public var username: String?
}

public final class Availability {
var date: String
var day : String

init(date: String, day: String) {
    self.date = date
    self.day = day

    }
}
public final class AvailData {
var am: String?
var pm: String?

init(am: String?,pm: String?) {
    self.am = am
    self.pm = pm
   }
}

创建一个Model1数组。

var arrData = [Model1]()

对于我来说，我想搜索可用性数组。因此，我将逻辑放在下面，它可以正常工作。

 let searchData = arrData.filter({ singleObj -> Bool in
     let result = singleObj.availabilities?.filter({ $0.date == "2019/09/17" })
     return result?.count > 0 ? true : false
 })

此快速代码将仅返回与2019/09/17匹配的那些记录

Swift过滤嵌套的对象数组

3 个答案: