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[英]textDidChange method called twice when click on Clear button in UISearch bar
[英]UISearch bar not showing result until did not click on cancel button
我正在嘗試實現搜索功能。 這將從用戶那里獲取輸入,並在按下搜索按鈕時返回結果。 我有搜索這個例子。
但是這個例子對我沒有用。 我有一個這樣的學生。
override func viewDidLoad() {
super.viewDidLoad()
// Setup the Location Search bar Controller
let locationSearchTable = storyboard!.instantiateViewController(withIdentifier: "SearchViewController") as! SearchViewController
resultSearchController = UISearchController(searchResultsController: locationSearchTable)
resultSearchController?.searchResultsUpdater = locationSearchTable
searchBar = resultSearchController!.searchBar
searchBar.sizeToFit()
searchBar.placeholder = "Search"
searchBar.delegate = self
navigationItem.titleView = resultSearchController?.searchBar
resultSearchController?.hidesNavigationBarDuringPresentation = false
resultSearchController?.dimsBackgroundDuringPresentation = true
definesPresentationContext = true
}
另一個功能是
extension SearchViewController : UISearchResultsUpdating, UISearchBarDelegate {
func updateSearchResults(for searchController: UISearchController) {
self.view.isHidden = false
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
self.viewList.removeAll()
getListOfItem(searchBar.text!)
}
}
我的
getListOfItem
從數據庫中獲取數據,在收到數據后,我正在從該函數重新加載我的UITableView
。
func getListOfItem(_ query : String){
if !loadingData {
self.viewList.removeAll()
}
let request = NSMutableURLRequest(url: URL(string: MyUrl.API_SERVER_URL)!)
request.httpMethod = "POST"
let postString = "tag=search&p=\(query)&page=\(String(pageNo))"
print("postString=\(postString)")
DispatchQueue.main.async {
self.startSpinner()
}
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if(error != nil){
self.loadingData = false
DispatchQueue.main.async {
self.stopSpinner()
}
let nsError = error! as NSError
let dialog = UIAlertController(title: "Internal Server Error?", message: nsError.localizedDescription, preferredStyle: UIAlertControllerStyle.alert)
dialog.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
DispatchQueue.main.async(execute: {
self.present(dialog, animated: true, completion: nil)
})
} else{
self.loadingData = false
do {
var success : Int = 0
let jsonObj = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String : AnyObject]
success = jsonObj["success"]! as! Int
if success == 1 {
let json = jsonObj["data"]as? NSArray
self.pageNo = self.pageNo + 1
DispatchQueue.main.async {
for i in 0 ..< json!.count {
let productObj = json![i]as? [String: AnyObject]
let newModel = Search()
newModel.attributeId = productObj!["AttributeID"] as? String
newModel.attributePrice = productObj!["AttributePrice"] as? String
newModel.imageURL = productObj!["ImageURL"] as? String
newModel.inventoryCurrent = productObj!["InventoryCurrent"] as? String
newModel.pageText = productObj!["PageText"] as? String
newModel.productDescription = productObj!["ProductDescription"] as? String
newModel.pageURL = productObj!["PageURL"] as? String
newModel.productID = productObj!["ProductID"] as? String
newModel.productName = productObj!["ProductName"] as? String
newModel.thumbURL = productObj!["ThumbURL"] as? String
newModel.internationalShipping = productObj!["internationalShipping"] as? String
newModel.maxQty = productObj!["maxQty"] as? String
newModel.productDisplay = productObj!["productDisplay"] as? String
self.viewList.append(newModel)
}
}
}
DispatchQueue.main.async {
print("reload")
self.checkItems()
self.viewListTable.reloadData()
//self.view.layoutIfNeeded()
}
} catch {
}
DispatchQueue.main.async(execute: {
self.stopSpinner()
})
}
}
task.resume();
}
此函數從數據庫中獲取數據並重新加載
myTableView
。 在我點擊UISearchBar
cancel
按鈕之前,結果不會顯示。 請幫助我,謝謝。更新我剛剛在
searchBarSearchButtonClicked()
添加了一些代碼后解決了這個問題,我已經添加了self.resultSearchController?.view.isHidden = true
這一行,但在這里我無法直接滾動我的表格。 意味着我可以在點擊后滾動我的表格
在我的
searchBarSearchButtonClicked
添加一些代碼行之后。 我的問題正在得到解決。
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
self.viewList.removeAll()
self.searchBar.resignFirstResponder()//This Line Remove the keyboard
self.resultSearchController?.view.isHidden = true // This line Hide current View
self.viewListTable.reloadData()
pageNo = 1
self.searchStr = searchBar.text! // This Line taking a search string into global variable for future use.
self.resultSearchController?.isActive = false // This Line for inActivate searchView.
getListOfItem()
}
在使用之前
Make Sure
在該函數中寫入的所有行的層次結構。
func updateSearchResults(for searchController: UISearchController) {
self.view.isHidden = false
getListOfItem(searchBar.text!)
}
我想你錯過了在
func updateSearchResults(for searchController: UISearchController)
添加這個getListOfItem(searchBar.text!)
func updateSearchResults(for searchController: UISearchController)
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