swift - 在多部分 TableView 中使用 TextField 进行搜索 - Swift

Question

我使用以下方法搜索文本字段，当我在表格 View 中使用单个部分时，它工作正常。

但是当我在 TableView 中有多个部分时，我不知道如何实现这一点

在普通单节表格 View 中

foodTypeArr = ["Japanesh", "Chinesh", "Lebanesh", "Italian", "Indian"]
searchResultArr.addObjects(from: foodTypeArr as! [Any])

func searchAutocompleteEntriesWithSubstring(substring: String)
{
 searchResultArr.removeAllObjects()

        for curString in foodTypeArr
        {
            let myString:NSString! = curString as! NSString

            if (myString).lowercased.contains(substring)
            {
                searchResultArr.add(curString)
            }
        }

        self.tblList.reloadData()
 }

在多节 TableView 中

var searchAreaArr = NSMutableArray()    
var areaArr = [[String]]()
var areaTitles = NSArray()

areaArr = [["Vadvalli", "Mullai Nagar", "P.N.Pudhur"], ["Lawly Road", "Kowly Brown", "D.B Road"], ["Raja Street", "Gandhipark", "Five corner road”, "Main Town Hall”]]

areaTitles = ["Vadavalli", "R.S.Puram", "Town Hall"]

for i in 0..<areaArr.count
{
   searchAreaArr.addObjects(from: areaArr[i])
}

我在 TextField-shouldChangeCharactersIn 范围内调用以下方法

func searchAutocompleteEntriesWithSubstring(substring: String)
{
    areaArr.removeAll()
            var mArr = [String]()

        for curString in searchAreaArr
        {
            let myString:NSString! = curString as! NSString

            if (myString).lowercased.contains(substring)
            {
                mArr.append(curString as! String)
            }
        }
        areaArr.insert(mArr, at: 0)
}

这样，它将过滤后的字符串插入 areaArr 中的 第 0 个数组索引。但我需要它应该在他们的部分并且部分名称应该是他们自己的，并更改字符串过滤部分的部分索引

比如说，如果搜索文本是road，它应该是

R.S puram (Section 1)
- Lawly Road
- D.B Road
Town Hall (Section 2)
- Five corner road

我的表格 View 方法

func numberOfSections(in tableView: UITableView) -> Int
{
    return areaArr.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
    return areaArr[section].count
}

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
{
    if section < areaTitles.count
        {
            return areaTitles[section] as? String
        }
    return nil
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
        let cell:UITableViewCell = 
self.tblList.dequeueReusableCell(withIdentifier: "cell") as UITableViewCell!
    cell.textLabel?.text = "\(areaArr[indexPath.section][indexPath.row])"
}

我失去了我的一整天，请帮助解决这个问题......欢迎您提出建议

Answer 1

你可以在 shouldChangeCharactersIn 方法中做这样的事情

let areaArr = [["Vadvalli", "Mullai Nagar", "P.N.Pudhur"], ["Lawly Road", "Kowly Brown", "D.B Road"], ["Raja Street", "Gandhipark", "Five corner road", "Main Town Hall"]]

let areaTitles = ["Vadavalli", "R.S.Puram", "Town Hall"]
let searchText = "road"
var areaArrResult = areaArr.map { $0.filter({ $0.lowercased().contains(searchText) }) }
let areaTitlesResult = areaTitles.filter {  !areaArrResult[areaTitles.index(of: $0)!].isEmpty }
areaArrResult = areaArrResult.filter { !$0.isEmpty }

print(areaArrResult)//[["Lawly Road", "D.B Road"], ["Five corner road"]]
print(areaTitlesResult)//["R.S.Puram", "Town Hall"]

或

     var allDetails:[(String,[String])] = [] 
     var searchResult:[(String,[String])] = []


    allDetails = [("Vadavalli",["Vadvalli", "Mullai Nagar", "P.N.Pudhur"]),
                  ("R.S.Puram",["Lawly Road", "Kowly Brown", "D.B Road"]),
                  ("Town Hall",["Raja Street", "Gandhipark", "Five corner road", "Main Town Hall"])]
    searchAreaArr = areaArr.map({ ($0.0,$0.1.filter({ $0.lowercased().contains(substring) })) }).filter { !$0.1.isEmpty}
    print(searchResult)//[("R.S.Puram", ["Lawly Road", "D.B Road"]), ("Town Hall", ["Five corner road"])]

然后 在numberOfSections 返回searchResult.count

在numberOfRowsInScetion 返回searchResult[section].1.count

在 titleForHeaderInSection 方法中你可以使用

return searchResult[section].0

在 cellForRowAt 方法中

cell.textLabel?.text = "\(searchResult[indexPath.section].1[indexPath.row])"