Question

大家好，我已经尝试了几天没有找到答案。在我提出UITableViewDelegate和UITableViewDataSource这个问题之前，我已经实施了didSelectRowAt和didDeselectRowAt，这两种方法都无效。

class SearchClass: UIViewController, UITableViewDataSource,UITableViewDelegate, UISearchBarDelegate {

@IBOutlet weak var myTableView: UITableView!
@IBOutlet weak var mySearchBar: UISearchBar!

var objects:PFObject!

var searchResults = [String]()

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    self.navigationController?.navigationBar.topItem?.title = "Search"
    self.navigationController?.navigationBar.barTintColor = UIColor.white
    self.navigationController?.navigationBar.backgroundColor = UIColor.black
    self.navigationController?.navigationBar.tintColor = UIColor.black
    self.searchResults.removeAll()

}


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    self.myTableView.dataSource = self
    self.mySearchBar.delegate = self
    self.myTableView.delegate = self


    self.navigationController?.extendedLayoutIncludesOpaqueBars = true

    //self.myTableView.reloadData()
}

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

func searchBarSearchButtonClicked(_ searchBar: UISearchBar)
{
    searchBar.resignFirstResponder()
   // self.navigationController?.navigationBar.isHidden = false
    self.mySearchBar.endEditing(true)
    print("Search word = \(searchBar.text)")

    let query = PFQuery(className:"myClass")
    //let newText = searchBar.autocapitalization
    searchBar.autocapitalizationType = .none
    searchBar.text = searchBar.text?.localizedLowercase
    query.whereKey("collegeNickName", contains: searchBar.text)

    query.findObjectsInBackground { (results, error) in
        if error == nil {

            if let objects = results {

                self.searchResults.removeAll(keepingCapacity: true)

                for object in objects {
                    let firstName = object.object(forKey: "myName") as! String
                    let image = object.object(forKey: "myImage") as! PFFile
                    //   let lastName = object.object(forKey: "myPlace") as! String
                    //   let fullName = firstName + " " + lastName
                    self.searchResults.append(firstName)

                    print(self.searchResults[0])
                    DispatchQueue.main.async {
                        self.myTableView.reloadData()
                        self.mySearchBar.resignFirstResponder()
                    }
                }
            }

        } else {

            let myAlert = UIAlertController(title:"Alert", message:error?.localizedDescription, preferredStyle:UIAlertControllerStyle.alert)

            let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil)

            myAlert.addAction(okAction)

            self.present(myAlert, animated: true, completion: nil)
            return


                }
            }
        }

func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
    //self.navigationController?.navigationBar.isHidden = true
}


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

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
    myTableView.register(UITableViewCell.self, forCellReuseIdentifier: "myCell")

    let myCell = myTableView.dequeueReusableCell(withIdentifier: "myCell")

    myCell?.textLabel?.text = searchResults[indexPath.row]
    print(searchResults[indexPath.row])
    return myCell!
}


func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    print("Hi")
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {

}

func searchBarCancelButtonClicked(_ searchBar: UISearchBar)
{
    mySearchBar.resignFirstResponder()
    mySearchBar.text = ""
    myTableView.reloadData()
}

func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
    //self.mySearchBar.resignFirstResponder()
    //self.mySearchBar.endEditing(true)
    self.definesPresentationContext = true
}

@IBAction func refreshButtonTapped(sender: AnyObject) {
    mySearchBar.resignFirstResponder()
    mySearchBar.text = ""
    self.searchResults.removeAll(keepingCapacity: false)
    self.myTableView.reloadData()
  }
}

它还实现了一个searchView我得到了我想要搜索的内容，但无法在我的课程中使用select和deselect方法。

Answer 1

self.myTableView.dataSource = self
self.myTableView.delegate = self

＆lt; ---加上这个。

Answer 2

注意到您已将故事板中的委托设置为UIViewController而不是<source srcset="http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU6FOW3O0jR-t4LlattRw52wBmvg/ 240w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU6cKxp_v-TRYywK8kMonNsWFMiA/ 320w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU76IwFM89MgsU2CsVpABa94yrwg/ 500w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU7Lx-mjq8_Dk9iI7H4kcoPo-SmA/ 640w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU4kJMUl3WmTvlAFqfo4wIlDssvw/ 800w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU6-HA9n31rVvmbG5touqPt59wY3s/ 1024w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU6-dIS7lLTB0CSOM4O0wlvLx9pDnb/ 1600w, http://yourshot.nationalgeographic.com/u/fQYSUbVfts-T7odkrFJckdiFeHvab0GWOfzhj7tYdC0uglagsDq-TNIRQ3qELJppd8ZLNRvnhakVub3VQlC2V5_yAGtyNoIAtaUObf5sBn_PGVEIlVVcerfj6l1ovYy2W4h7lMAkEVLdiCZKr9S9wuwge1myLnbvmEvxjeQ-HOfdmgprhGjqn4pNtAwmKvwU6FcgiBNz-Nj7_J7e61F6_8oUXwoV/ 2048w" sizes="730px" data-reactid=".5.0.1.0.0.$http=2//www=1nationalgeographic=1com/photography/photo-of-the-day/2017/01/boy-buffalo-thailand.0.0.0.0.0.0.0.0"> see Discover - that's mine UViewController

Answer 3

在Interface Builder中

将delegate的{{1}} 和 My Table View连接到SearchClass

然后，您可以删除self.myTableView.dataSource = self

中的多余SearchClass

考虑Interface Builder中的连接比代码中的连接更有效。

Answer 4

细胞宣言是错误的。你已经完成了以下代码

 let myCell = myTableView.dequeueReusableCell(withIdentifier: "myCell")

正确的格式

 let myCell = tableView.dequeueReusableCell(withIdentifier: "myCell")

原因：当您使用dequeue属性时，UITableView将其单元格从方法中获取的参数出列

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

看到有一个参数tableView，但您正在UITableView的outlelet中出列。

没有调用DidSelectRow方法

4 个答案: