我在我的UITablView上实现了UISearchController及其工作正常，但我正在尝试实现PrepareForSegue {...}但是我的Func上出现了一些错误：updateSearchResultsForSearchController
//声明变量//
var searchNotes = PFObject(className: "MyClass")
var filteredNotes: NSMutableArray! = NSMutableArray()
var resultSearchController = UISearchController()
var searchActive: Bool = false
.................................. ..................
override func viewDidLoad() {
super.viewDidLoad()
self.resultSearchController = UISearchController(searchResultsController: nil)
self.resultSearchController.searchResultsUpdater = self
self.resultSearchController.dimsBackgroundDuringPresentation = false
self.resultSearchController.searchBar.sizeToFit()
self.tableView.tableHeaderView = self.resultSearchController.searchBar
self.tableView.reloadData()
self.definesPresentationContext = true //self takes priority over the searchController presentation
self.resultSearchController.hidesNavigationBarDuringPresentation = false
}
// 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.resultSearchController.active
{
return self.filteredNotes.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.resultSearchController.active
{
cell.textLabel?.text = self.filteredNotes[indexPath.row] as? String
searchNotes = (self.noteObjects.objectAtIndex(indexPath.row) as? PFObject)!
cell.MasterTitleLabel?.text = searchNotes["Title"] as? String
cell.MasterTextLabel.text = searchNotes["Fstory"] as? String
cell.MasterTimeLabel.text = searchNotes["Time"] as? String
cell.MasterLocationLabel.text = searchNotes["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) {
var object :AnyObject?
if self.resultSearchController.active{
object = filteredNotes[indexPath.row]
print(filteredNotes[indexPath.row])
self.performSegueWithIdentifier("openStory", sender: self)
} else {
object = self.noteObjects[indexPath.row]
print(noteObjects[indexPath.row])
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!
if self.resultSearchController.active
{
let object: PFObject = self.filteredNotes.objectAtIndex(indexPath.row) as! PFObject
upcoming.object = object
}
else{
let object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
upcoming.object = object
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}}}
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 ){
if self.resultSearchController.active
{
}else{
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)
}
}
func updateSearchResultsForSearchController(searchController: UISearchController) {
// self.filteredNotes.removeAll(keepCapacity: false)
self.filteredNotes.removeAllObjects()
// let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)
//
// let array = (self.noteObjects as NSArray).filteredArrayUsingPredicate(searchPredicate)
//
// self.filteredNotes = array as! [String]
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)
var array = (self.noteObjects as! [PFObject]).map { (obj) -> Array<PFObject> in
obj["Title"] as! Array
}
//两行中出现错误
array = (array as NSArray).filteredArrayUsingPredicate(searchPredicate) as Array
self.filteredNotes = array as Array
self.tableView.reloadData()
}
}
in array =（array as NSarray）... line error：
MasterTableViewController.swift:281:36: Cannot convert value of type '[AnyObject]' to type 'Array<_>' in coercion
在self.filterednotes中......行错误：
MasterTableViewController.swift:282:30: Cannot convert value of type '[[PFObject]]' to type 'Array<_>' in coercion
错误：
<Sinhgad: 0x7fa53c02c5c0, objectId: DJ0oIHi9ir, localId: (null)> {
Fstory = "test 33";
Location = "test 3333";
Time = "test 333";
Title = "test 3";
}
2015-12-05 12:50:32.604 Notes[920:81965] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't use in/contains operator with collection <Sinhgad: 0x7fa53c02c5c0, objectId: DJ0oIHi9ir, localId: (null)> {
Fstory = "test 33";
Location = "test 3333";
Time = "test 333";
Title = "test 3";
} (not a collection)'
*** First throw call stack:
(
0 CoreFoundation 0x0000000110187e65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000111ec6deb objc_exception_throw + 48
2 Foundation 0x000000011059e6b1 -[NSCompoundPredicate evaluateWithObject:substitutionVariables:] + 0
3 Foundation 0x0000000110575719 -[NSPredicateOperator performOperationUsingObject:andObject:] + 286
4 Foundation 0x0000000110574e3c -[NSComparisonPredicate evaluateWithObject:substitutionVariables:] + 313
5 Foundation 0x0000000110574c94 _filterObjectsUsingPredicate + 398
6 Foundation 0x0000000110574a84 -[NSArray(NSPredicateSupport) filteredArrayUsingPredicate:] + 279
7 Notes 0x000000010eb087c7 _TFC5Notes25MasterTableViewController38updateSearchResultsForSearchControllerfS0_FCSo18UISearchControllerT_ + 919
8 Notes 0x000000010eb0896a _TToFC5Notes25MasterTableViewController38updateSearchResultsForSearchControllerfS0_FCSo18UISearchControllerT_ + 58
9 UIKit 0x00000001113d355d -[UISearchController _performAutomaticPresentation] + 1029
10 UIKit 0x0000000110d98185 -[UISearchBar(UISearchBarStatic) _searchFieldBeginEditing] + 220
11 UIKit 0x00000001207d69a8 -[UISearchBarAccessibility _searchFieldBeginEditing] + 45
12 UIKit 0x00000001109a88c8 -[UIApplication sendAction:to:from:forEvent:] + 92
13 UIKit 0x0000000110b17328 -[UIControl sendAction:to:forEvent:] + 67
14 UIKit 0x0000000110b175f4 -[UIControl _sendActionsForEvents:withEvent:] + 311
15 UIKit 0x00000001113884d8 -[UITextField willAttachFieldEditor:] + 800
16 UIKit 0x0000000110b214f1 -[UIFieldEditor becomeFieldEditorForView:] + 938
17 UIKit 0x000000011137c979 -[UITextField _becomeFirstResponder] + 210
18 UIKit 0x0000000110d9bdc5 -[UISearchBarTextField _becomeFirstResponder] + 96
19 UIKit 0x000000011137c737 -[UITextField __resumeBecomeFirstResponder] + 52
20 UIKit 0x0000000110d9c1ce __45-[UISearchBarTextField _becomeFirstResponder]_block_invoke + 447
21 UIKit 0x00000001109b2bd6 _runAfterCACommitDeferredBlocks + 317
22 UIKit 0x00000001109c6335 _cleanUpAfterCAFlushAndRunDeferredBlocks + 95
23 UIKit 0x00000001109d2227 _afterCACommitHandler + 90
24 CoreFoundation 0x00000001100b3367 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
25 CoreFoundation 0x00000001100b32d7 __CFRunLoopDoObservers + 391
26 CoreFoundation 0x00000001100a8f2b __CFRunLoopRun + 1147
27 CoreFoundation 0x00000001100a8828 CFRunLoopRunSpecific + 488
28 GraphicsServices 0x0000000113cf9ad2 GSEventRunModal + 161
29 UIKit 0x00000001109a6d44 UIApplicationMain + 171
30 Notes 0x000000010eafec0d main + 109
31 libdyld.dylib 0x000000011304c92d start + 1
32 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
答案 0 :(得分：0)
我不确定你的代码中是如何定义noteObjects的。 我认为你的问题是你投射的方式太多了，并试图投射到简单的“阵列”并不是你想要的。尝试类似下面的内容。
var noteObjects = [PFObject]()
var filteredNotes = [PFObject]()
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)
let array = (noteObjects as NSArray).filteredArrayUsingPredicate(searchPredicate)
filteredNotes = array as! [PFObject]
如果你真的希望noteObjects和filteredNotes是NSMutableArray而不是Swift数组，你可以试试以下内容。
var noteObjects = NSMutableArray()
var filteredNotes = NSMutableArray()
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!)
let array = noteObjects.filteredArrayUsingPredicate(searchPredicate)
filteredNotes = NSMutableArray(array: array)