UISearchBarDelegate搜索按鈕不工作swift 3 iOS 10.3

Question

我一直在尋找答案，我希望你能幫助我。我沒有看到代碼中的錯誤，但由於某種原因，當我按下「搜索」按鈕時，UISearchBarDelegate不起作用。

這是我的課

class BusquedaViewController: UIViewController, UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource { 

@IBOutlet weak var tableView: UITableView! 
var searchBar: UISearchBar! 
var referencias: [Reference]! 

override func viewDidLoad() { 
    super.viewDidLoad() 
    tableView.delegate = self 
    tableView.dataSource = self 
    searchBar = UISearchBar(frame: CGRect(x: 0, y: 0, width: 200, height: 20)) 
    searchBar.tintColor = UIColor.white 
    searchBar.delegate = self 
    self.parent?.navigationItem.titleView = searchBar 
    referencias = DataManager.sharedInstance.obtenerReferencias() 
} 

override func viewWillAppear(_ animated: Bool) { 
    self.parent?.title = "Busqueda" 
} 

//MARK: UISearchBar 
func searchBar(_ searchBar: UISearchBar, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool { 
    var placa = searchBar.text 
    if text.isEmpty { 
     return true 
    } else { 
     let uper = text.uppercased() 
     let allowed = "1234567890ABCDEFGHIJKLMNÑOPQRSTUVWXYZ-" 
     if !allowed.contains(uper) || (placa?.characters.count)! > 9 { 
      return false 
     } 
     searchBar.text = searchBar.text! + uper 
     return false 
    } 
} 

func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) { 
    searchBar.showsCancelButton = true 
} 

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 
    searchBar.showsCancelButton = false 
    searchBar.text = "" 
    searchBar.endEditing(true) 
} 

func searchBarSearchButtonClicked(_ searchBar: UISearchBar) { 
    searchBar.endEditing(true) 
} 

//MARK: UITableView 
func numberOfSections(in tableView: UITableView) -> Int { 
    return referencias.isEmpty ? 1 : referencias.count 
} 
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    return 1 
} 

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
    let cell = UITableViewCell() 
    if referencias.isEmpty { 
     //cell.textLabel?.text = NSLocalizedString("NO_REFERENCIAS", comment: "") 
    } else { 
     cell.textLabel?.text = referencias[indexPath.row].model 
    } 
    return cell 
} 
} 

Answer 1

這只是一個猜測，但shouldChangeTextIn range:方法返回爲返回鍵（字符\n）假的，那可能會影響其他委託方法。您可以嘗試修改方法以使用下面的實現，並查看searchBarSearchButtonClicked方法是否被調用？

func searchBar(_ searchBar: UISearchBar, shouldChangeTextIn range: NSRange, 
       replacementText text: String) -> Bool { 
    return true 
}