Swift SearchBar 无法过滤数据

Question

我已经设置了 UISearchBar 的东西。但我收到错误消息。

Cannot assign value of type '[cellData]' to type '[String]'

这是代码

struct cellData {
let jobTitle : AnyObject?
let companyName : String?
let jobLocation : String?
let jobDescription : String?
let jobReq : String?
let firstPosterImage : AnyObject?
let secondPosterImage : AnyObject?
let createdAt : Date

init(jobTitle: AnyObject?, companyName: String? = nil, jobLocation: String? = nil ,jobDescription: String? = nil, jobReq:String? = nil, firstPosterImage: AnyObject? = nil, secondPosterImage: AnyObject? = nil, timeStamp:Double) {

    self.jobTitle = jobTitle
    self.companyName = companyName
    self.jobLocation = jobLocation
    self.jobDescription = jobDescription
    self.jobReq = jobReq
    self.firstPosterImage = firstPosterImage
    self.secondPosterImage = secondPosterImage
    self.createdAt = Date(timeIntervalSince1970: timeStamp/1000) 

}

}

var cellDataArray = [cellData]()
var filtered = [String]()


func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {


    if searchText.isEmpty {
        isSearching = false
        tableView.reloadData()

    } else {
        isSearching = true
        filtered  = cellDataArray.filter({($0.jobTitle?.lowercased?.contains(searchText.lowercased()))!})
        tableView.reloadData()
    }


}

我在这行遇到错误

filtered  = cellDataArray.filter({($0.jobTitle?.lowercased?.contains(searchText.lowercased()))!})

。请注意，CellDataArray 具有 cellData 结构。我在 tableView 中使用 searchBar。

谢谢。

Answer 1

您的问题是 cellDataArray 和 filtered 属于两种不同的数据类型( String 和 struct CellData )所以你不能简单地将一个分配给另一个而不进行像

这样的转换

let res  = cellDataArray.filter({($0.jobTitle?.lowercased?.contains(searchText.lowercased()))!})
filtered  = res.map { $0.anyProprtyInside } // property should be a String

您的意思可能是将过滤声明为

var filtered = [CellData]() // start structs / classes / protocols with uppercase letter