import UIKit
class MasterTableViewController: UITableViewController, PFLogInViewControllerDelegate, PFSignUpViewControllerDelegate, UISearchBarDelegate, UISearchResultsUpdating {
//approches for uisearchbar
var searchNotes: [PFObject] = [PFObject]()
var notesSearchController = UISearchController()
var searchActive: Bool = false
// creating array for holding ojects
var noteObjects: NSMutableArray! = NSMutableArray()
var v = 0
override func viewDidLoad() {
super.viewDidLoad()
self.notesSearchController = UISearchController(searchResultsController: nil)
self.notesSearchController.dimsBackgroundDuringPresentation = true
self.notesSearchController.searchResultsUpdater = self
// Configure the search controller's search bar
self.notesSearchController.searchBar.placeholder = "Search for a user"
self.notesSearchController.searchBar.sizeToFit()
self.notesSearchController.searchBar.delegate = self
self.definesPresentationContext = true
// Set the search controller to the header of the table
self.tableView.tableHeaderView = self.notesSearchController.searchBar
print("check")
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if v == 0 {
self.fetchAllObjectsFromLocalDataStore()
//self.fetchAllObjects()
}
}
// fetching data from local datastore and from parse
func fetchAllObjectsFromLocalDataStore(){
let query: PFQuery = PFQuery(className: "Sinhgad")
query.orderByDescending("createdAt")
query.fromLocalDatastore()
query.findObjectsInBackgroundWithBlock { ( objects, error) -> Void in
if (error == nil) {
let temp: NSArray = objects as NSArray!
self.noteObjects = temp.mutableCopy() as! NSMutableArray
self.tableView.reloadData()
}else {
print(error!.userInfo)
}
}
}
func fetchAllObjects(){
let query: PFQuery = PFQuery(className: "Sinhgad")
query.orderByDescending("createdAt")
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
PFObject.pinAllInBackground(objects, block: nil )
self.fetchAllObjectsFromLocalDataStore()
// self.tableView.reloadData()
} else {
print(error?.userInfo)
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
if (self.notesSearchController.active) {
return self.searchNotes.count
} else {
return self.noteObjects.count
}}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! MasterTableViewCell
if (self.notesSearchController.active && self.searchNotes.count > indexPath.row) {
// bind data to the search results cell
let object : PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
cell.MasterTitleLabel?.text = object["Title"] as? String
cell.MasterTextLabel.text = object["Fstory"] as? String
cell.MasterTimeLabel.text = object["Time"] as? String
cell.MasterLocationLabel.text = object["Location"] as? String
return cell
} else {
let object : PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
cell.MasterTitleLabel?.text = object["Title"] as? String
cell.MasterTextLabel.text = object["Fstory"] as? String
cell.MasterTimeLabel.text = object["Time"] as? String
cell.MasterLocationLabel.text = object["Location"] as? String
return cell
}}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
if (self.notesSearchController.active && self.searchNotes.count > 0) {
// Segue or whatever you want
self.performSegueWithIdentifier("openStory", sender: self)
} else {
self.performSegueWithIdentifier("openStory", sender: self)
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let upcoming: AddNoteTableViewController = segue.destinationViewController as! AddNoteTableViewController
if (segue.identifier == "openStory"){
let indexPath = self.tableView.indexPathForSelectedRow!
let object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
upcoming.object = object
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
}
@IBAction func btnReload(sender: AnyObject) {
fetchAllObjects()
}
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if (editingStyle == UITableViewCellEditingStyle.Delete ){
let object : PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
// the below for deleting the selected cell's object from server's database
// object.deleteInBackground()
//the below for deleting the selected cell's object from localstorage
object.unpinInBackground()
self.noteObjects.removeObjectAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
// MARK: - Parse Backend methods
func loadSearchUsers(searchString: String) {
let query: PFQuery = PFQuery(className: "Sinhgad")
query.orderByDescending("createdAt")
// Filter by search string
query.whereKey("Notes", containsString: searchString)
self.searchActive = true
query.findObjectsInBackgroundWithBlock {(objects, error) -> Void in
if (error == nil) {
self.searchNotes.removeAll(keepCapacity: false)
self.searchNotes += objects as [PFObject]!
self.tableView.reloadData()
} else {
// Log details of the failure
print("search query error: \(error) \(error!.userInfo)")
}
self.searchActive = false
}
}
// MARK: - Search Bar Delegate Methods
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
// Force search if user pushes button
let searchString: String = searchBar.text!.lowercaseString
if (searchString != "") {
loadSearchUsers(searchString)
}
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
// Clear any search criteria
searchBar.text = ""
// Force reload of table data from normal data source
}
// MARK: - UISearchResultsUpdating Methods
// This function is used along with UISearchResultsUpdating for dynamic search results processing
// Called anytime the search bar text is changed
func updateSearchResultsForSearchController(searchController: UISearchController) {
let searchString: String = searchController.searchBar.text!.lowercaseString
if (searchString != "" && !self.searchActive) {
loadSearchUsers(searchString)
}
}
}
上面的代码用于从 parse 的服务器和本地存储中检索存储的对象，并在表格视图中显示它们。
一切正常，但我正在尝试实现搜索栏以将搜索功能添加到我的应用程序中。问题是，当我运行应用程序时，它会显示搜索栏，但是当与搜索栏交互时，它会向上移动并消失，并且在输入任何内容时都会消失。
我没有得到任何搜索结果，并且NSLog得到了这个：
2015-12-03 16:43:48.769 Notes[1015:56944] Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior (<UISearchController: 0x7ff2d48165a0>)
我知道缺少一些东西，它不是实现该功能的正确方法。
如果有人知道如何正确地做或缺少什么，请告诉我，如果提问的方式不正确，谢谢和抱歉！
我刚刚发现我的 Pfobject 的 'searchNotes' var 什么都没有，我的意思是它是空的！为此我试过
cell.MasterTitleLabel?.text = searchNotes["Title"] as! String
但它给出错误
cannot subscript a value of type '[PFObject]' with an index of type 'string'
我知道它是因为我将 searchNotes 声明为
searchNotes [PFObject] = [PFObject]()
我应该这样做
searchNotes PFObject = PFObject()
但是当我这样做时，它会出现很多错误，如果有人知道如何解决这个问题，请提供帮助