显示主数组结果，基于swift中嵌套的数组元素搜索

Question

我有一组示例数据

public var myResults : [Section] =[:]

public var sectionsData: [Section] = [
     Section(name: "Mac", items: [
        Item(name: "MacBook", detail: "Apple's ultraportable laptop, trading portability for speed and connectivity."),
        Item(name: "MacBook Air", detail: "While the screen could be sharper, the updated 11-inch MacBook Air is a very light ultraportable that offers great performance and battery life for the price."),
        Item(name: "MacBook Pro", detail: "Retina Display The brightest, most colorful Mac notebook display ever. The display in the MacBook Pro is the best ever in a Mac notebook."),

        Item(name: "iMac", detail: "iMac combines enhanced performance with our best ever Retina display for the ultimate desktop experience in two sizes."),

        Item(name: "Mac Pro", detail: "Mac Pro is equipped with pro-level graphics, storage, expansion, processing power, and memory. It's built for creativity on an epic scale."),

        Item(name: "Mac mini", detail: "Mac mini is an affordable powerhouse that packs the entire Mac experience into a 7.7-inch-square frame."),
       Item(name: "OS X El Capitan", detail: "The twelfth major release of OS X (now named macOS)."),

      Item(name: "Accessories", detail: "")
        ],collapsed: false),

Section(name: "iPad",
 items: [
        Item(name: "iPad Pro", detail: "iPad Pro delivers epic power, in 12.9-inch and a new 10.5-inch size."),

        Item(name: "iPad Air 2", detail: "The second-generation iPad Air tablet computer designed, developed, and marketed by Apple Inc."),
        Item(name: "iPad mini 4", detail: "iPad mini 4 puts uncompromising performance and potential in your hand."),

        Item(name: "Accessories", detail: "")
        ] ,collapsed: false),


Section(name: "iPhone", items: [
        Item(name: "iPhone 6s", detail: "The iPhone 6S has a similar design to the 6 but updated hardware, including a strengthened chassis and upgraded system-on-chip, a 12-megapixel camera, improved fingerprint recognition sensor, and LTE Advanced support."),

        Item(name: "iPhone 6", detail: "The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc."),

        Item(name: "iPhone SE", detail: "The iPhone SE was received positively by critics, who noted its familiar form factor and design, improved hardware over previous 4-inch iPhone models, as well as its overall performance and battery life."),

        Item(name: "Accessories", detail: "")
        ],collapsed: false)
]

如果我基于Item数组中的detail值进行搜索，例如details包含'The iPhone‘，如何获得主数组结果和嵌套值

我的结果应该是

myResults = Section(name: "iPhone", items: [
  Item(name: "iPhone 6s", detail: "The iPhone 6S has a similar design to the 6 but updated hardware, including a strengthened chassis and upgraded system-on-chip, a 12-megapixel camera, improved fingerprint recognition sensor, and LTE Advanced support."),
        Item(name: "iPhone 6", detail: "The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc."),
        Item(name: "iPhone SE", detail: "The iPhone SE was received positively by critics, who noted its familiar form factor and design, improved hardware over previous 4-inch iPhone models, as well as its overall performance and battery life.")
],collapsed: false)

Answer 1

这应该能起到作用：

let text = "The iPhone"
let filteredSections = sectionsData.compactMap({ (aSection) -> Section? in
    let keptItems = aSection.items.filter({ $0.detail.contains(text) })
    if keptItems.isEmpty {
        return nil
    } else {
        return Section(name: aSection.name, items: keptItems, collapsed: aSection.collapsed)
    }
})

我们迭代sectionsData。我们根据要搜索的文本过滤Section中的项目。如果没有项目，我们跳过它(return nil)。否则，我们创建一个新的部分，保留该部分的其他值，但带有过滤的项目。

Answer 2

下面是我的更新版本，因为我设法正确地阅读了说明:)

let filtered = sectionsData.compactMap { (section) -> Section? in  
let filteredItems = section.items.filter { item in item.detail.contains("iPhone") } 
    if filteredItems.count > 0 {
        return Section(name: section.name, items: filteredItems, collapsed: section.collapsed) 
    }
    return nil
}