Wie verwende ich Suchleiste, um Daten von Json-Ergebnis mit Swift zu holen?

Question

Voraussetzung: Ich brauche die JSON Daten in UITableView mit UISearchBar so platziert i UISearchBar (nicht UISearchBarController) zu filtern, um ganz oben auf meiner Ansicht-Controller und i platziert UITableView unten an der UISearchBar und ich api Schlüssel haben auch die Daten in json enthält Format .

Code in meinem View-Controller:

class FourthViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate,UITabBarControllerDelegate,UISearchDisplayDelegate{ 
    var arrDict = NSMutableArray() 
    var FilteredData = NSMutableArray() 
    var userid:String! 
    @IBOutlet var SearchButton: UISearchBar! 
    @IBOutlet var SlideShow: ImageSlideshow! 
    @IBOutlet var MyTableView: UITableView! 
    @IBOutlet var PostButton: UIButton! 

    override func viewDidLoad() { 
    super.viewDidLoad() 
    self.navigationController?.navigationBar.hidden = true 
    SearchButton.delegate = self 

    jsonParsingFromURL() 
     SlideShow.backgroundColor = UIColor.whiteColor() 
     SlideShow.slideshowInterval = 5.0 
     SlideShow.pageControlPosition = PageControlPosition.UnderScrollView 
     SlideShow.pageControl.currentPageIndicatorTintColor = UIColor.lightGrayColor() 
     SlideShow.pageControl.pageIndicatorTintColor = UIColor.blackColor() 
     SlideShow.contentScaleMode = UIViewContentMode.ScaleAspectFill 
     SlideShow.setImageInputs(alamofireSource) 
      } 
func jsonParsingFromURL() { 
    if Reachability.isConnectedToNetwork() == true 
    { 
    Alamofire.request(.GET, "http://something.com", parameters: nil, encoding: .URL, headers: nil).response { (req, res, data, error) -> Void in 
     let dataString = NSString(data: data!, encoding:NSUTF8StringEncoding) 
     print(dataString) 
     self.startParsing(data!) 
    } 
    } 
    else{ 
     let alert = UIAlertController(title: "No Internet Connection", message: "make sure your device is connected to the internet", preferredStyle: UIAlertControllerStyle.Alert) 
     alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)) 
     self.presentViewController(alert, animated: true, completion: nil) 
    } 
} 

func startParsing(data :NSData) 
{ 
    let dict: NSDictionary!=(try! NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers)) as! NSDictionary 
    for i in 0 ..< (dict.valueForKey("ads") as! NSArray).count 
    { 
     arrDict.addObject((dict.valueForKey("ads") as! NSArray) .objectAtIndex(i)) 
    } 
    MyTableView.reloadData() 
} 

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 

      return arrDict.count 
} 
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
let cell = tableView.dequeueReusableCellWithIdentifier("FirstCell") as! FirstTableViewCell 
    let strTitle : NSString=arrDict[indexPath.row] .valueForKey("categoryname") as! NSString 
    let photoImage : NSString=arrDict[indexPath.row] .valueForKey("image1") as! NSString 
    let SecondImage : NSString=arrDict[indexPath.row] .valueForKey("image2") as! NSString 
    let ThirdImage : NSString=arrDict[indexPath.row] .valueForKey("image3") as! NSString 
    let FourthImage : NSString=arrDict[indexPath.row] .valueForKey("image4") as! NSString 
    let URL_API_HOST2:String = "https://www.imagestring.com/" 
    // let FourthData = NSData(contentsOfURL: NSURL(string: URL_API_HOST2 + (FourthImage as String))!) 
    cell.image1.sd_setImageWithURL(NSURL(string: URL_API_HOST2 + (photoImage as String))) 
    cell.image2.sd_setImageWithURL(NSURL(string: URL_API_HOST2 + (SecondImage as String))) 
     // cell.image2.image = UIImage(data: SecData!) 
    cell.image3.sd_setImageWithURL(NSURL(string: URL_API_HOST2 + (ThirdImage as String))) 
    cell.image4.sd_setImageWithURL(NSURL(string: URL_API_HOST2 + (FourthImage as String))) 
    cell.CategoryName.text = strTitle as String 
    return cell 
    } 

Ausgabe: Ich habe bereits ein api Schlüssel geladen, die als category..now bekannt ist, muss ich Suche bar..subcategory mit Subkategorie Daten holen hat eine andere api ....

Answer 1

Apple-Anweisung: UISearchController-Objekt verwaltet die Anzeige von Suchergebnissen basierend auf Interaktionen mit einer Suchleiste. description here

Wenn you'r UISearchBar

import UIKit 

class TDSearchVC: UIViewController ,UITableViewDataSource,UITableViewDelegate , UISearchResultsUpdating , UISearchBarDelegate{ 

//MARK:- Outlets 
//MARK:- 
    @IBOutlet var tblSearch: UITableView! 

//MARK:- Properties 
//MARK:- 

    var dataArray = [String]() 
    var filteredArray = [String]() 
    var shouldShowSearchResults = false 
    var searchController: UISearchController! 

//MARK:- VDL 
//MARK:- 
    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Do any additional setup after loading the view. 

     loadListOfCountries() // get the data from file 
     configureSearchController() // Config Controller in VC 
    } 

//MARK:- VC Methods 
//MARK:- 

    func loadListOfCountries() { 
     // Specify the path to the countries list file. 
     let pathToFile = Bundle.main.path(forResource: "Country", ofType: "txt") 

     if let path = pathToFile { 
      // Load the file contents as a string. 

      do{ 
       let countriesString = try String(contentsOfFile: path, encoding: String.Encoding.utf8) 
       self.dataArray = countriesString.components(separatedBy: "\n") 
      } 
      catch{ 
       print("try-catch error is catched!!") 
      } 
      tblSearch.reloadData() 
     } 
    } 


    func configureSearchController() { 
     searchController = UISearchController(searchResultsController: nil) 
     searchController.dimsBackgroundDuringPresentation = false 
     searchController.searchBar.placeholder = "Search here..." 
     searchController.searchBar.delegate = self 
     searchController.searchResultsUpdater = self 
     searchController.searchBar.sizeToFit() 

     self.tblSearch.tableHeaderView = searchController.searchBar 
    } 

    //MARK:- table datasource 
    //MARK:- 

    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{ 
     if shouldShowSearchResults { 
      return filteredArray.count 
     } 
     else { 
      return dataArray.count 
     } 
    } 

    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ 
     let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as UITableViewCell 

     if shouldShowSearchResults { 
      cell.textLabel?.text = filteredArray[indexPath.row] 
     } 
     else { 
      cell.textLabel?.text = dataArray[indexPath.row] 
     } 

     return cell 
    } 

    //MARK:- search update delegate 
    //MARK:- 

    public func updateSearchResults(for searchController: UISearchController){ 
     let searchString = searchController.searchBar.text 

     // Filter the data array and get only those countries that match the search text. 

     filteredArray = dataArray.filter({ (country) -> Bool in 
        let countryText: NSString = country as NSString 
        return (countryText.range(of: searchString!, options: .caseInsensitive).location) != NSNotFound 
       }) 
     tblSearch.reloadData() 
    } 

    //MARK:- search bar delegate 
    //MARK:- 

    public func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) { 
     shouldShowSearchResults = true 
     tblSearch.reloadData() 
    } 


    public func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 
     shouldShowSearchResults = false 
     tblSearch.reloadData() 
    } 

} 

mit der Wenn you'r UITextField

import UIKit 

class TDSearchVC: UIViewController , UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate{ 


    @IBOutlet var textSearch: UITextField! 
    @IBOutlet var tblSearchResult: UITableView! 

    var arrData : [String] = [] 
    var arrFilterData : [String] = [] 
    var isSearch : Bool! 


    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Do any additional setup after loading the view. 

     isSearch = false 

     /* 
     * If date Data is in Json then use JSON Serialization 
     */ 
     arrData = ["Apple", "Banana", "Chikoo", "Brew", "Cherry", "Mango", "Lotus", "Peacock", "Temple", "Pine Apple","Glass", "Rose", "Church", "Computer", "Carrot"] 

    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    // MARK:- textfield 

    public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool{ 

     var searchText = textField.text! + string 

     if string == "" { 
      searchText = (searchText as String).substring(to: searchText.index(before: searchText.endIndex)) 
     } 

     if searchText == "" { 
      isSearch = false 
      tblSearchResult.reloadData() 
     } 
     else{ 
      getSearchArrayContains(searchText) 
     } 

     return true 
    } 

    // Predicate to filter data 
    func getSearchArrayContains(_ text : String) { 
     var predicate : NSPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", text) 
     arrFilterData = (arrData as NSArray).filtered(using: predicate) as! [String] 
     isSearch = true 
     tblSearchResult.reloadData() 
    } 

    // MARK:- TableView Delegates 
    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{ 

     if isSearch! { 
      return arrFilterData.count 
     } 
     else{ 

      return arrData.count 
     } 
    } 

    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ 

     var cell : UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell")! as UITableViewCell 

     if isSearch! { 
      cell.textLabel?.text = arrFilterData[indexPath.row] 
     } 
     else{ 

      cell.textLabel?.text = arrData[indexPath.row] 
     } 
     return cell 
    } 
}