Ios NSUnknownKeyException UICollectionView
我最近为我的应用程序实现了一个新的视图，它有一个Ios NSUnknownKeyException UICollectionView,ios,swift,uicollectionview,Ios,Swift,Uicollectionview,我最近为我的应用程序实现了一个新的视图，它有一个UICollectionView作为图像加载到的网格： class MemoriesView: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource{ @IBOutlet weak var images_collection: UICollectionView! override func viewDidLoad() { super.
UICollectionViewclass MemoriesView: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource{
@IBOutlet weak var images_collection: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
self.navigationController?.navigationBarHidden = false
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("memory_image_1", forIndexPath: indexPath) as! CollectionViewController
return cell
}
}
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Certi.MemoriesView 0x7fb613f3c8d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key imageCollectionView.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010ee6ae65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010f2c7deb objc_exception_throw + 48
2 CoreFoundation 0x000000010ee6aaa9 -[NSException raise] + 9
3 Foundation 0x000000010cfb29bb -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
4 UIKit 0x000000010d98c320 -[UIViewController setValue:forKey:] + 88
5 UIKit 0x000000010dbbaf41 -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x000000010edab4a0 -[NSArray makeObjectsPerformSelector:] + 224
7 UIKit 0x000000010dbb9924 -[UINib instantiateWithOwner:options:] + 1864
8 UIKit 0x000000010d992eea -[UIViewController _loadViewFromNibNamed:bundle:] + 381
9 UIKit 0x000000010d993816 -[UIViewController loadView] + 178
10 UIKit 0x000000010d993b74 -[UIViewController loadViewIfRequired] + 138
11 UIKit 0x000000010d999f4f -[UIViewController __viewWillAppear:] + 120
12 UIKit 0x000000010d9c9e44 -[UINavigationController _startCustomTransition:] + 1203
13 UIKit 0x000000010d9da23f -[UINavigationController _startDeferredTransitionIfNeeded:] + 712
14 UIKit 0x000000010d9db3af -[UINavigationController __viewWillLayoutSubviews] + 57
15 UIKit 0x000000010db81ff7 -[UILayoutContainerView layoutSubviews] + 248
16 UIKit 0x000000010d8b44a3 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 703
17 QuartzCore 0x000000011101459a -[CALayer layoutSublayers] + 146
18 QuartzCore 0x0000000111008e70 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
19 QuartzCore 0x0000000111008cee _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
20 QuartzCore 0x0000000110ffd475 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 277
21 QuartzCore 0x000000011102ac0a _ZN2CA11Transaction6commitEv + 486
22 UIKit 0x000000010d7f7f7c _UIApplicationHandleEventQueue + 7329
23 CoreFoundation 0x000000010ed96a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
24 CoreFoundation 0x000000010ed8c95c __CFRunLoopDoSources0 + 556
25 CoreFoundation 0x000000010ed8be13 __CFRunLoopRun + 867
26 CoreFoundation 0x000000010ed8b828 CFRunLoopRunSpecific + 488
27 GraphicsServices 0x00000001115d7ad2 GSEventRunModal + 161
28 UIKit 0x000000010d7fd610 UIApplicationMain + 171
29 Certi 0x000000010b92c1fd main + 109
30 libdyld.dylib 0x000000010fde392d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
由于未捕获的异常“NSUnknownKeyException”而终止应用程序，原因：“[setValue:forUndefinedKey:]：此类不符合key imageCollectionView的键值编码。”
***第一次抛出调用堆栈：
(
0 CoreFoundation 0x000000010ee6ae65例外预处理+165
1 libobjc.A.dylib 0x000000010f2c7deb objc_异常_抛出+48
2 CoreFoundation 0x000000010ee6aaa9-[N异常提升]+9
3基金会0x000 000 010CFB29 BB-[ NSKORKS（NSKEY ValueCudid）设置值：FrKEY::+ 288）
4 UIKit 0x000000010d98c320-[UIViewController设置值：forKey:+88
5 UIKit 0x000000010dbbaf41-[UIRuntimeOutletConnection connect]+109
6 CoreFoundation 0x000000010edab4a0-[NSArray makeObjectsPerformSelector:+224
7 UIKit 0x000000010dbb9924-[UINib实例化所有者：选项：][1864
8 UIKit 0x000000010d992eea-[UIViewController\u loadViewFromNibNamed:bundle:][381
9 UIKit 0x000000010d993816-[UIViewController loadView]+178
10 UIKit 0x000000010d993b74-[UIViewController loadViewIfRequired]+138
11 UIKit 0x000000010d999f4f-[UIViewController\uuu视图将出现：][120
12 UIKit 0x000000010d9c9e44-[UINavigationController_startCustomTransition:+1203
13 UIKit 0x000000010d9da23f-[UINavigationController\U STARTDEFERREDTRANSION（如果需要）：+712
14 UIKit 0x000000010d9db3af-[UINavigationController\uuu视图将布局子视图]+57
15 UIKit 0x000000010db81ff7-[UILayoutContainerView布局子视图]+248
16 UIKit 0x000000010d8b44a3-[UIView（CALayerDelegate）布局层的子层：+703
17夸脱核心0x0000000111101459A-[CALayer布局子层]+146
18夸脱核心0x0000000111008e70(如果需要)Zn2Ca5层布局交易+366
19 QuartzCore 0x0000000111008cee\u ZN2CA58层布局和显示（如果需要）PNS\u 11事务+24
20夸脱核心0x0000000110ffd475_ZN2CA7Context18提交交易PNS_11交易+277
21夸脱核心0x000000011102ac0a_Zn2Ca11交易承诺+486
22 UIKit 0x000000010D7F7C_UIU应用程序句柄VENTQUEUE+7329
23 CoreFoundation 0x000000010ed96a31\uuuu CFRUNLOOP\u正在调用\u OUT\u以执行\u函数\uuu+17
24 CoreFoundation 0x000000010ed8c95c\uU CFRunLoopDoSources0+556
25 CoreFoundation 0x000000010ed8be13\uu CFRunLoopRun+867
26 CoreFoundation 0x000000010ed8b828 CFRunLoopRunSpecific+488
27图形服务0x00000001115d7ad2 GSEventRunModal+161
28 UIKit 0x000000010d7fd610 UIApplicationMain+171
29证书0x000000010b92c1fd主管道+109
30 libdyld.dylib 0x000000010fde392d开始+1
)
libc++abi.dylib:以NSException类型的未捕获异常终止
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("memory_image_1", forIndexPath: indexPath) as! CollectionViewController
return cell
UICollectionViewCellCollectionViewControllerfunc collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("memory_image_1", forIndexPath: indexPath) as! UICollectionViewCell
// see below
return cell
\\see below单元格的值以选择此行显示的内容的地方。如果使用多个节，则可以通过indexPath.row
和indexPath.section
确定行
此外，如果要为单元格使用自定义类来处理默认视图以外的视图，则需要将cell
强制转换到该自定义类，而不是UICollectionViewController
，虽然我认为既然你还在看教程，那么你现在还不打算尝试
正如我在对这个问题的评论中所说，本教程和本网站上的其他教程对初学者来说非常好。此功能就是问题所在：
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("memory_image_1", forIndexPath: indexPath) as! CollectionViewController
return cell
您正在尝试将UICollectionViewCell
转换为CollectionViewController
。对该行末尾的简单更改：
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("memory_image_1", forIndexPath: indexPath) as! UICollectionViewCell
// see below
return cell
将防止此错误，但仍会得到空白单元格。我添加注释\\see below
的地方是您需要更新单元格的值以选择此行显示的内容的地方。如果使用多个节，则可以通过indexPath.row
和indexPath.section
确定行
此外，如果要为单元格使用自定义类来处理默认视图以外的视图，则需要将cell
强制转换到该自定义类，而不是UICollectionViewController
，虽然我认为既然你还在看教程，那么你现在还不打算尝试
正如我在对这个问题的评论中所说的，本教程和本网站上的其他教程对初学者来说非常好。