问题
When click the searchController's cancel button, the Searchbar send back too much, I use constraint to solve that, but ,NSLayoutAttibute do not work on real device, but only work on sumilator, using UISearchController in my project , there is a strange issue:
So I think out a method to solve the issue, in the UISearchBarDelegate delegate method, when cancel(取消) button click, set the top constant to 0:
// MARK: - search delegate
func searchBarCancelButtonClicked() {
for item:NSLayoutConstraint in self.tableView.constraints {
self.view.setNeedsLayout()
if item.firstAttribute == NSLayoutAttribute.top {
item.constant = 0
}
}
}
It is real work for simulator, but it not work on real device, :(
1) On the simulator, works fine:
2) On the real device (I have tested in 5c and 6, 6p), the issue still exist.
The code
I think something maybe useful, so I post the code below:
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]?
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
}
// 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")
}
// MARK: - private methods
func navBack() {
_ = self.navigationController?.popViewController(animated: true)
}
// MARK: - actions
@IBAction func unwindToChooseStoreVCFromChooseRole(segue: UIStoryboardSegue){
}
@IBAction func nextStepAction(_ sender: UIButton) {
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.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()
}
}
How to deal with the strange issue?
来源：https://stackoverflow.com/questions/40974647/uisearchcontroller-issue-nslayoutattribute-do-not-work-in-real-device