致命錯誤：超出範圍的索引（同時試圖將圖像加載到表格視圖）

Question

我試圖從這裏URL加載的圖像的代碼：

import UIKit 

class TripsTableViewCell : UITableViewCell 
{ 

    @IBOutlet weak var tripName: UILabel! 
    @IBOutlet weak var tripImage: UIImageView! 
} 
    //let urlString = "http://127.0.0.1:8000/v1/trips/" 

class TripsTableViewController: UITableViewController { 
var myIndex = 0 
var trips = [Trip]() 
var tripNameArray = [String]() 
var tripImageArray = [String]() 



override func viewDidLoad() { 
    super.viewDidLoad() 
    self.newGetFunction() 

    /*let trip0:Trip = Trip(id: 1, name: "Dead Sea", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 
    let trip1:Trip = Trip(id: 1, name: "Aaqaba", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 


    let trip2:Trip = Trip(id: 1, name: "Maeen", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 


    let trip3:Trip = Trip(id: 1, name: "Petra", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 


    let trip4:Trip = Trip(id: 1, name: "Jerash", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 

    let trip5:Trip = Trip(id: 1, name: "Um Qais", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 


    let trip6:Trip = Trip(id: 1, name: "Amman", location: "Amman", hostedBy: "Tarek", time: "8:00", spokenLanguage: "English", maxPeople: 25, meetingPoint: "7th Circle", image: "https://ichef-1.bbci.co.uk/news/976/cpsprodpb/75E7/production/_89938103_deadseadrone.jpg") 

    trips.append(trip0) 
    trips.append(trip1) 
    trips.append(trip2) 
    trips.append(trip3) 
    trips.append(trip4) 
    trips.append(trip5) 
    trips.append(trip6) 

    print("HERE") 
    print(trips) 
    */ 
    tableView.delegate = self; 
    tableView.dataSource = self; 
    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
    // self.navigationItem.rightBarButtonItem = self.editButtonItem() 
} 

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

// MARK: - Table view data source 


override func numberOfSections(in tableView: UITableView)-> Int{ 
    // #warning Incomplete implementation, return the number of sections 
    return 1 
} 

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    // #warning Incomplete implementation, return the number of rows 
    return tripNameArray.count 
} 


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

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! TripsTableViewCell 
    cell.tripName.text = tripNameArray[indexPath.row] 
    //cell.tripImage.downloadImage(from: self.tripImageArray[indexPath.row]) 
    let imgURL = NSURL(string: tripImageArray[indexPath.row]) 
    if imgURL != nil{ 
     let data = NSData(contentsOf: (imgURL as URL?)!) 
     cell.tripImage.image = UIImage(data: data! as Data) 
    } 

    //Nart's Work 

    /*cell.tripImage.image = UIImage(named: trips[indexPath.row].Image) 
    let t = trips[indexPath.row] 
    cell.tripName.text = t.Name 
    print(indexPath.row) 
    print(trips[indexPath.row].Name)*/ 

    return cell 
} 


override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 
    myIndex = indexPath.row 
    NSLog("%d",myIndex) 
    performSegue(withIdentifier: "segue", sender: self) 
} 

override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
} 

func newGetFunction() 
{ 
    let url = URL (string: "http://127.0.0.1:8000/v1/trips/") 
    let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in 
     if error != nil 
     { 
      print ("ERROR") 
     } 
     else 
     { 
      if let content = data 
      { 
       do 
       { 
        //Array 
        let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject 
        print(myJson) 
        var myJsonArray = (myJson as! NSArray) as Array 
        for trip in myJsonArray 
        { 
         if let tripDict = trip as? NSDictionary{ 
          if let name = tripDict.value(forKey: "name"){ 
           self.tripNameArray.append(name as! String) 
          } 
          if let name = tripDict.value(forKey: "image"){ 
           if let imgName = (name as? String){ 
           self.tripImageArray.append((imgName as? String)!) 
          } 
          } 
          OperationQueue.main.addOperation ({ 
           self.tableView.reloadData() 
          }) 
         } 
        } 
       } 
       catch 
       { 
       } 
      } 
     } 
    } 
    task.resume() 
} 

}

我「M在這條線得到一個錯誤： -

let imgURL = NSURL(string: tripImageArray[indexPath.row]) 

和錯誤是： -

1）PAC抓取失敗，錯誤[NSURLErrorDomain： -1003]

2）[] nw_proxy_resolver_create_parsed_array PAC計算錯誤：NSURLErrorDomain：-1003

3）致命錯誤：超出範圍的索引

Answer 1

你試圖顯示在tripImageArray每個項目的表視圖但對於numberOfRowsInSection函數，則返回的計數爲tripNameArray。顯然，你的tripNameArray數組比tripImageArray有更多的元素，所以你有這個錯誤。

您需要從其中一箇中選擇作爲您的表格視圖的計數。

Answer 2

的tripImageArray和tripNameArray不相似的大小，newGetFunction的部分更改爲：

 for trip in myJsonArray 
          { 
           if let tripDict = trip as? NSDictionary{ 
            if let name = tripDict.value(forKey: "name"){ 
             self.tripNameArray.append(name as! String) 
             if let name = tripDict.value(forKey: "image"){ 
              if let imgName = (name as? String){ 
               self.tripImageArray.append((imgName as? String)!) 
              } 
              else{ 
              // append default image 
             self.tripImageArray.append("default-img.jpg") 
              } 
            } 
            else{ 
              // append default image 
              self.tripImageArray.append("default-img.jpg") 
            } 
            OperationQueue.main.addOperation ({ 
             self.tableView.reloadData() 
            }) 
           } 
          }