错误：无法将 [anyobject] 转换为强制类型数组<_>
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【中文标题】错误：无法将 [anyobject] 转换为强制类型数组<_>【英文标题】：error : cannot convert [anyobject] to type array<_> in coercion 【发布时间】：2015-12-04 13:14:22 【问题描述】：我在我的 UITablView 上实现了 UISearchController 并且它工作正常，但我正在尝试实现 PrepareForSegue... 但我的 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
//两行都出现错误
array = (array as NSArray).filteredArrayUsingPredicate(searchPredicate) as Array
self.filteredNotes = array as Array
self.tableView.reloadData()
in array = (array as NSarray)... 行错误：
MasterTableViewController.swift:281:36: Cannot convert value of type '[AnyObject]' to type 'Array<_>' in coercion
在self.filterednotes......行错误：
MasterTableViewController.swift:282:30: Cannot convert value of type '[[PFObject]]' to type 'Array<_>' in coercion
如果有人知道，不知道如何解决这个问题，请告诉我 谢谢
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)
【问题讨论】：
【参考方案1】：我不确定 noteObjects 在您的代码中是如何定义的。 我认为你的问题是你的投射方式太多，而试图投射到简单的“数组”并不是你想要的。试试下面的方法。
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 的类型是NSMutableArray 而不是Swift 数组，你可以试试下面的方法。
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)
【讨论】：
@marckhapde 我按照您的建议进行了尝试，但在与搜索栏交互时出现错误 @marckhapde 查看我的整个代码，我更新了我的代码，以便您可以看到所有声明和函数 @marcKhapde 并且错误指向类名...并显示“它不是集合” @marcKhapde 现在您可以看到错误我更新了完整错误及其在与搜索栏交互时发生的错误 看起来 noteObjects 包含您的自定义 PFObject 类型的元素，它不是集合，并且 CONTAINS 谓词仅适用于集合。如果你想在 Swift 中过滤一个数组，你也可以使用 Array 类型的 filter 方法。以上是关于错误：无法将 [anyobject] 转换为强制类型数组<_>的主要内容，如果未能解决你的问题，请参考以下文章
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