SearchController问题，当搜索displayController时，会显示搜索栏的间距

Question

问题在于：

  

在storyboard中，我必须取消选中Adjust Scroll View Insets，因为如果不这样做，我会得到另一个问题（UISearchController issue, NSLayoutAttribute do not work in real device），我不知道这个如果影响这里的问题。（我在模拟器中测试，如果检查Adjust Scroll View Insets，此处的问题将不会出现）

我的代码

import UIKit
import SVProgressHUD

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

    @IBOutlet weak var tableView: UITableView!

    var ori_dataSource: [StoreListModel] = [StoreListModel]()
    var dataSource = [String]()
    var filterdDataSource = [String]()
    var resultSearchController = UISearchController()
    var choosedStore:StoreListModel? = nil

    var userInfoFromChooseTerant:[String:Any]?

    @IBOutlet weak var top_constraint: NSLayoutConstraint!

    override func viewDidLoad() {
        super.viewDidLoad()

        initData()
        initUI()
    }


    // MARK: - view life
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        self.navigationController?.isNavigationBarHidden = false

    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)

        self.navigationController?.isNavigationBarHidden = true
    }

    func initData()  {

        // 1.配置
        self.resultSearchController = UISearchController(searchResultsController: nil)
        self.resultSearchController.searchResultsUpdater = self
        self.resultSearchController.dimsBackgroundDuringPresentation = false
        self.resultSearchController.searchBar.sizeToFit()
        self.resultSearchController.searchBar.placeholder = "搜索"
        self.resultSearchController.searchBar.tintColor = UIColor.black
        self.resultSearchController.searchBar.delegate = self
        self.tableView.tableHeaderView = self.resultSearchController.searchBar

        let nib = UINib(nibName: "TerantListCell", bundle: nil)
        // Required if our subclasses are to use: dequeueReusableCellWithIdentifier:forIndexPath:
        //tableView.register(nib, forCellReuseIdentifier: "TerantListCell")
        self.tableView.register(nib, forCellReuseIdentifier: "TerantListCell")
        self.tableView.tableFooterView = UIView.init()

        self.tableView.reloadData()

        networkForStoreList()
    }
    func initUI() {

        let backNavItem:UIBarButtonItem = UtilSwift.addBackButtonItem(nil, controlelr: self)
        backNavItem.action = #selector(navBack)

        // print(userInfoFromChooseTerant!)

        // 2.隐藏cell下的Line
        tableView.separatorStyle = UITableViewCellSeparatorStyle.none

        // 3.tableView

    }

    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.

        let chooseRole: ChooseRoleViewController = segue.destination as! ChooseRoleViewController

        chooseRole.userInfoFromChooseStore = self.userInfoFromChooseTerant

    }

    // MARK: - search delegate
    func searchBarCancelButtonClicked() {

        for item:NSLayoutConstraint in self.tableView.constraints {

            self.view.setNeedsLayout()
            if item.firstAttribute == NSLayoutAttribute.top {
                item.constant = 0
            }
        }
    }

    // MARK: - searchbar delegate
    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {


        searchBar.setValue("取消", forKey:"_cancelButtonText")
    }

    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {


    }

    // MARK: - private methods

    func navBack()  {
        _ = self.navigationController?.popViewController(animated: true)
    }

    // MARK: - actions

    @IBAction func unwindToChooseStoreVCFromChooseRole(segue: UIStoryboardSegue){


    }

    @IBAction func nextStepAction(_ sender: UIButton) {

        // 可以不选择门店，非必选
    /*if choosedStore == nil {

        let lml_alert: LMLDropdownAlertView = LMLDropdownAlertView.init(frame: self.view.bounds)
        lml_alert.showAlert(title: Global.鹿鸣提示标题, detail_Title: "请选择门店！", cancleButtonTitle: "取消", confirmButtonTitle: "确定", action: { (button) in

        })

        return
    }*/

        self.resultSearchController.isActive = false // 失活

        if self.choosedStore != nil {

            _ = self.userInfoFromChooseTerant?.updateValue(self.choosedStore!.userId, forKey: "store_id")
        }

        self.performSegue(withIdentifier: "ChooseStoreVCToChooseRoleVC", sender: self)

    }


    // MARK: - network

    func networkForStoreList() {

        let params:[String:String] = [
            "createTime":"-1",
            "userId" : self.userInfoFromChooseTerant!["affiliated_id"] as! String
    ]


        // url_terantList
        Mysevers.afpost(withHud: true, andAddressname: Global.url_listStore, parmas: params, requestSuccess: { (result) in

            let stateCode = UtilSwift.getNetStateCode(result: result as Any, key: Global.net_key_stateCode)

            if stateCode == 0 {

                let storeArr:[[String : Any]] = UtilSwift.getNetAnyObject(result: result as Any, key: "list") as! [[String : Any]]  // Global.net_key_bussiness 后台写错了
                //self.ori_dataSource = terantArr
                for item:[String: Any] in storeArr {

                    let store_list_model: StoreListModel = StoreListModel.initStoreListModelWithDic(dic: item)
                    self.ori_dataSource.append(store_list_model)
                }


                for item:StoreListModel in self.ori_dataSource {

                    self.dataSource.append(item.name)
                }



                self.tableView.reloadData()  // 刷新tableView

            }else if stateCode == -1 {

                // 弹窗系统错误
                SVProgressHUD.showError(withStatus: "系统错误")

            }

        }, failBlcok: {

            // 弹窗系统错误
            SVProgressHUD.showError(withStatus: "系统错误")
        })

    }

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

        if self.resultSearchController.isActive {

            return filterdDataSource.count
        }else {

            return dataSource.count
       }
    }

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

        let cell: TerantListCell = tableView.dequeueReusableCell(withIdentifier: "TerantListCell", for: indexPath) as! TerantListCell

        // 配置cell
        if self.resultSearchController.isActive {

            cell.title_label.text = self.filterdDataSource[indexPath.row]
        }else {

            cell.title_label?.text = self.dataSource[indexPath.row]
        }

        return cell

    }

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

        self.choosedStore = self.ori_dataSource[indexPath.row]

    }

    // MARK: - regexp

    func updateSearchResults(for searchController: UISearchController) {

        self.filterdDataSource.removeAll(keepingCapacity: false)

        let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)

        let array = (self.dataSource as NSArray).filtered(using: searchPredicate)

        self.filterdDataSource = array as! [String]

        self.tableView.reloadData()
    }


}

Answer 1

转到＆＃34; .storyboard＆＃34;文件所在＆＃34; ChooseStoreViewController＆＃34;存在。然后单击UITableView并更改tableView约束，如下所示：

检查顶部空间约束。