奇怪的问题，我UISearchController

问题描述：

必须有searchbar和navbar之间的空间：

而在Debug in Hierarchy：

该表查看

的包装查看，我们可以看到空间（20 PIX）

而在storyboard，我的限制设置为tableView，注意了：navigationBar由自己draged ，本地人被我藏起来了。

我的代码

import UIKit 
import SVProgressHUD 

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

@IBOutlet weak var navbar: UINavigationBar! 

@IBOutlet weak var tableView: UITableView! 

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

override func viewDidLoad() { 
    super.viewDidLoad() 

    // Do any additional setup after loading the view. 
    initData() 
    initUI() 
} 

// MARK: - init 
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() { 
    // 1.隐藏cell下的Line 
    tableView.separatorStyle = UITableViewCellSeparatorStyle.none 
} 



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



// 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. 

    if segue.identifier == "StoreListGotoStoreDetailVC" { 

     let detail_vc:StoreDetailVC = segue.destination as! StoreDetailVC 
     detail_vc.store_info = self.choosedStore 

    } 

} 


// MARK: - delegate 
func searchBarCancelButtonClicked() { 

    for item:NSLayoutConstraint in self.tableView.constraints { 

     if item.firstAttribute == NSLayoutAttribute.top { 
      item.constant = 0 
     } 
    } 

} 

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

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

    for item:NSLayoutConstraint in self.navbar.constraints { 

     if item.firstAttribute == NSLayoutAttribute.height { 
      item.constant = 0 
     } 
    } 


} 

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 

    for item:NSLayoutConstraint in self.navbar.constraints { 

     if item.firstAttribute == NSLayoutAttribute.height { 

      item.constant = 64 
     } 
    } 

} 

// MARK: - private methods 


// MARK: - actions 

// MARK: - unwind 
@IBAction func unwindToStoreListVCFromStoreDetailVC(segue: UIStoryboardSegue) { 


} 


// MARK: - network 

func networkForStoreList() { 

    let userStatic: UserStaticSwift = UserStaticSwift.sharedInstance() 

    let params:[String:String] = [ 
     "createTime":"-1", 
     "userId" : userStatic.userId // 商户id 
    ] 

    // url_listUsers 
    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 userArr:[[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 userArr { 

       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: "网络异常") 
     }) 

    } 

    // 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] 
     tableView.deselectRow(at: indexPath, animated: true) 

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

    } 

    // MARK: - 正则 

    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() 
    } 


}

尝试 - 1

当我uncheck的，第一次来到这个vc，这个问题是不存在的，但如果我点击searchBar，这个问题会回来的，我怀疑我的代码，如果是某个错误：

尝试 - 2

如果我尝试下面这段代码：

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 

    for item:NSLayoutConstraint in self.navbar.constraints { 

     if item.firstAttribute == NSLayoutAttribute.height { 

      item.constant = 44 // before is 64. 
     } 
    } 

}

哥你使用默认的导航控制器？ –

@Himanshu Moradiya，是的，但'navigationBar'是我自己制作的。因为我认为这样做可以方便地编辑'navigationBar'，默认的'navigationBar'被我隐藏了。 – aircraft

是否在编辑更改时在编码中设置了tableview和searchbar的框架？？ –

答

许多尝试后：

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 

    for item:NSLayoutConstraint in self.navbar.constraints { 

     if item.firstAttribute == NSLayoutAttribute.height { 

      item.constant = 64 
     } 
    } 

    // set this help me! :) 
    tableView.contentInset = UIEdgeInsets.zero 
    tableView.scrollIndicatorInsets = UIEdgeInsets.zero 
}

答

因为我不知道你限制你的意见如何。我想这个问题是由于automaticallyAdjustsScrollViewInsets。您应该在ViewController的automaticallyAdjustsScrollViewInsets = false。或者您应该将您的UITableView限制为View.Top而不是TopLayoutGuide.Bottom。

我已经测试了取消勾选故事板中的AdjustsScrollViewInsets，但是仍然存在问题，请检查我的编辑 - 1' – aircraft

知道如何限制导航栏会很棒。 –

答

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 

    for item:NSLayoutConstraint in self.navbar.constraints { 

     if item.firstAttribute == NSLayoutAttribute.height { 

      item.constant = 44 // changes this one line and check it if any problem then put comment below. 
     } 
    } 
}

@aircraft your tableview top constrain = 0; ？ –

@aircraft是否更新了输出结果gif文件，其常量= 44 –

。您可以看到我的'Debug in Hierarchy：'picture，at there，'tableView'的底部视图没问题，顶部到'navigationBar''但是'searchbar'的位置是偏移的，不是以'wrapperView'顶部开始的。 – aircraft

奇怪的问题，我UISearchController

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