如何使用 Alamofire + 搜索栏？

Question

I don't know much about iOS because it's my first time dealing with it.

So I might not have enough explanation.

I'm sorry about that.

I would like to use alamofire and Searchbar.

So I'm applying it to various tutorials.

But now I'm running into an error.

It's my code.

import UIKit
import Alamofire
import SwiftyJSON

class MyTableViewController: UITableViewController, UISearchBarDelegate {
    
    var filteredData: [String]!
    var arr_id = [String]()
    var arr_name = [String]()
    
    @IBOutlet weak var mytableview: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.mytableview.delegate = self
        self.mytableview.dataSource = self
        searchBar.delegate = self
        
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 0
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell")! as UITableViewCell
        
        cell.textLabel?.text = filteredData[indexPath.row]
        
        return cell
    }
    
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        filteredData = []
        
        let myapiUrl = "http://myurl/test/name.php?name=" + searchText
        
        AF.request(myapiUrl, method: .get).responseJSON { (myresponse) in
            switch myresponse.result {
            case .success:
                print(myresponse.result)
                
                let myresult = try? JSON(data: myresponse.data!)
                print(myresult!)
                
                let resultArray = myresult!
                
                self.arr_id.removeAll()
                self.arr_name.removeAll()
                
                for i in resultArray.arrayValue {
                    let id = i["id"].stringValue
                    self.arr_id.append(id)
                    
                    let name = i["name"].stringValue
                    self.arr_name.append(name)
                }
                self.mytableview.reloadData()
                break
                
            case .failure:
                print(myresponse.error!)
                break
            }
        }
    }
}

There is no error in the code.

However, when I run it, the AppDelegate will get an error.

Thread 1: signal SIGABRT

And it's error log.

2020-10-25 14:57:13.668841+0900 Foodin[5941:314426] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UITableViewController loadView] instantiated view controller with identifier "UIViewController-BYZ-38-t0r" from storyboard "Main", but didn't get a UITableView.'
*** First throw call stack:
(
    0   CoreFoundation                      0x00007fff23c7127e __exceptionPreprocess + 350
    1   libobjc.A.dylib                     0x00007fff513fbb20 objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff23c710bc +[NSException raise:format:] + 188
    3   UIKitCore                           0x00007fff47a042d7 -[UITableViewController loadView] + 619
    4   UIKitCore                           0x00007fff47a13aca -[UIViewController loadViewIfRequired] + 172
    5   UIKitCore                           0x00007fff47a14277 -[UIViewController view] + 27
    6   UIKitCore                           0x00007fff480ca3cf -[UIWindow addRootViewControllerViewIfPossible] + 150
    7   UIKitCore                           0x00007fff480c9ac0 -[UIWindow _updateLayerOrderingAndSetLayerHidden:actionBlock:] + 232
    8   UIKitCore                           0x00007fff480cab43 -[UIWindow _setHidden:forced:] + 362
    9   UIKitCore                           0x00007fff480ddef1 -[UIWindow _mainQueue_makeKeyAndVisible] + 42
    10  UIKitCore                           0x00007fff482e9431 -[UIWindowScene _makeKeyAndVisibleIfNeeded] + 202
    11  UIKitCore                           0x00007fff4761d445 +[UIScene _sceneForFBSScene:create:withSession:connectionOptions:] + 1405
    12  UIKitCore                           0x00007fff4808f170 -[UIApplication _connectUISceneFromFBSScene:transitionContext:] + 1018
    13  UIKitCore                           0x00007fff4808f4b2 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 304
    14  UIKitCore                           0x00007fff47bfa7f5 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
    15  FrontBoardServices                  0x00007fff365d6165 -[FBSSceneImpl _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 442
    16  FrontBoardServices                  0x00007fff365fc4d8 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke.154 + 102
    17  FrontBoardServices                  0x00007fff365e0c45 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 220
    18  FrontBoardServices                  0x00007fff365fc169 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke + 355
    19  libdispatch.dylib                   0x0000000106eb7d48 _dispatch_client_callout + 8
    20  libdispatch.dylib                   0x0000000106ebacb9 _dispatch_block_invoke_direct + 300
    21  FrontBoardServices                  0x00007fff3662237e __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
    22  FrontBoardServices                  0x00007fff3662206c -[FBSSerialQueue _queue_performNextIfPossible] + 441
    23  FrontBoardServices                  0x00007fff3662257b -[FBSSerialQueue _performNextFromRunLoopSource] + 22
    24  CoreFoundation                      0x00007fff23bd4471 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    25  CoreFoundation                      0x00007fff23bd439c __CFRunLoopDoSource0 + 76
    26  CoreFoundation                      0x00007fff23bd3bcc __CFRunLoopDoSources0 + 268
    27  CoreFoundation                      0x00007fff23bce87f __CFRunLoopRun + 1263
    28  CoreFoundation                      0x00007fff23bce066 CFRunLoopRunSpecific + 438
    29  GraphicsServices                    0x00007fff384c0bb0 GSEventRunModal + 65
    30  UIKitCore                           0x00007fff48092d4d UIApplicationMain + 1621
    31  Foodin                              0x0000000105c9005b main + 75
    32  libdyld.dylib                       0x00007fff5227ec25 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

Answer 1

You have some problems before Alamofire and SearchBar issue. Main problem is tableview inheritance..

Try to change your Table View class to UITableView from Storyboard or make subclass of your UITableViewController to UiViewController .

Answer 2

An UITableViewController has a predefined tableView property.

Delete the IBOutlet and use the tableView property instead.

Notes:

• Delete the break keywords in the switch expression. They are not needed in Swift.
• Loading (apparently) the same data in textDidChange again and again is unnecessarily inefficient. Load the data once and filter it.
• Multiple arrays as data source is a horrible practice. You should look for better tutorials. Create a custom struct.
• Drop SwiftyJSON in favor of the Codable protocol.
• Never declare a property representing an array as implicit unwrapped optional. Declare it as non-optional empty array.
• Don't use those ugly snake_cased variable names. The Swift convention is lowerCamelCase .
• Never ignore potential errors with try? - especially during development - and never force unwrap optionals which can be nil .