无法识别的选择器发送到实例 [英] unrecognized selector sent to instance
问题描述
我得到以下错误消息，我不能理解为什么它的发生，因为我不使用任何UIImageView。有时我得到相同的错误，但它的CALayer？！？
它的价值还提到我有2个nibs和2个控制器和一个基本控制器，这个代码驻留。 / p>
编辑：
这是我的项目结构
MainViewController&它的nib
- nib中的HomeViewController
MainViewController-Landscape&它的nib
- HomeViewController - nib中的横向
HomeViewControllerBase - 无nib
- 所有插座和项目配置代码存在的基类。
- 下面的两个子类使用插座。
HomeViewController
- 继承自HomeViewControllerBase
HomeViewController-Landscape
- 继承自HomeViewControllerBase
因此，发生的是子类尝试释放其基类所有的出口在它）。我已经设计了这样的方式，以避免重复的代码在不同的方向viewcontrollers。
@implementation MainViewController
- void）orientationChanged：（NSNotification *）notification
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice] .orientation;
if（UIDeviceOrientationIsLandscape（deviceOrientation）&&！isShowingLandscapeView）
{
[self presentModalViewController：self.landscapeViewController
animated：YES];
isShowingLandscapeView = YES;
}
else if（UIDeviceOrientationIsPortrait（deviceOrientation）&& isShowingLandscapeView）
{
[self dismissModalViewControllerAnimated：YES];
isShowingLandscapeView = NO;
}
}
- （id）init
{
self = [super initWithNibName：@MainViewControllerbundle：nil];
if（self）
{
isShowingLandscapeView = NO;
self.landscapeViewController = [[[MainViewController_Landscape alloc]
initWithNibName：@MainViewController-Landscapebundle：nil] autorelease];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver：self
selector：@selector（orientationChanged :)
name：UIDeviceOrientationDidChangeNotification
object：nil];
}
return self;
}
@end
@implementation HomeViewControllerBase
- （void）bestSellItemTapped：（id）sender
{
NSLog （@畅销商品）;
}
- （void）configureBestSellItems
{
[self startRetrievingRegions];
//从我们的bundle中加载所有的图像并将它们添加到滚动视图
// NSUInteger i;
for（int i = 0; i <= 150; i ++）
{
UILabel * itemTitle = [[UILabel alloc] initWithFrame：CGRectMake（0，0，100 ，50）];
itemTitle.text = @Majorca;
UILabel * itemPrice = [[UILabel alloc] initWithFrame：CGRectMake（0，50，100，50）];
itemPrice.text = @£249;
NSString * imageName = @tempImage.jpg;
UIImage * image = [UIImage imageNamed：imageName];
UIButton * mainButton = [[[UIButton alloc] init] autorelease];
[mainButton addTarget：self action：@selector（bestSellItemTapped :) forControlEvents：UIControlEventTouchUpInside];
[mainButton setBackgroundImage：image forState：UIControlStateNormal];
//将每个框架设置为默认高度和宽度，当我们调用updateScrollList时，它将被正确放置
CGRect rect = mainButton.frame;
rect.size.height = kScrollObjHeight;
rect.size.width = kScrollObjWidth;
mainButton.frame = rect;
mainButton.tag = i;
[mainButton addSubview：itemTitle]; [itemTitle release];
[mainButton addSubview：itemPrice]; [itemPrice release];
[self.bestSellScrollView addSubview：mainButton];
}
[self layoutScrollImages]; //现在将照片以串行布局放在scrollview中
}
//在加载视图之后（通常是从nib）执行viewDidLoad进行其他设置。
- （void）viewDidLoad
{
[super viewDidLoad];
[self configureBestSellItems];
}
- （void）layoutScrollImages
{
UIButton * view = nil;
NSArray * subviews = [self.bestSellScrollView subviews];
//以水平连续方式重新定位所有图像子视图
CGFloat curXLoc = 0;
for（在子视图中查看）
{
if（[view isKindOfClass：[UIButton class]]&& view.tag> 0）
{
CGRect frame = view.frame;
frame.origin = CGPointMake（curXLoc，0）;
view.frame = frame;
curXLoc + =（kScrollObjWidth + kScrollObjPadding）;
}
}
//设置内容大小以便可以滚动
[self.bestSellScrollView setContentSize：CGSizeMake（（150 * kScrollObjWidth），
[self.bestSellScrollView bounds] .size.height）];
}
@end
@interface HomeViewController：HomeViewControllerBase
@end
@interface HomeViewController_Landscape：HomeViewControllerBase
@end
@implementation HomeViewController
- （void）dealloc
{
[super dealloc]; //当我删除这个工作
}
@end
@implementation HomeViewController_Landscape
- （void）dealloc
{
[super dealloc]; //当我删除它它工作
}
@end
< HR>
- [UIImageView的bestSellItemTapped：]：无法识别的选择发送到实例0x681c2b0 2011-04-12 15：45：26.665 [21532：207] ***终止应用程序由于未捕获的异常'NSInvalidArgumentException'，原因：' - [UIImageView的bestSellItemTapped：]：无法识别的选择发送到实例0x681c2b0'
***在第一掷调用堆栈：（0的CoreFoundation 0x00dc85a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x00f1c313 objc_exception_throw + 44 2的CoreFoundation 0x00dca0bb - [NSObject的（NSObject的）doesNotRecognizeSelector：] + 187 3的CoreFoundation 0x00d39966 ___forwarding___ + 966 4的CoreFoundation 0x00d39522 _CF_forwarding_prep_0 + 50 5的UIKit 0x0001a4fd - [UIApplication的sendAction：：从：forEvent： ] + 119 6 UIKit的0x000aa799 - [UIControl sendAction：到：forEvent：] + 67 7 UIKit的0x000acc2b - [UIControl（内部）
_sendActionsForEvents：withEvent：方法] + 527 8 UIKit的0x000ab7d8 - [UIControl touchesEnded：withEvent：方法] + 458 9 UIKit的0x002ad4de
_UIGestureRecognizerSortAndSendDelayedTouches
+ 3609 10 UIKit的0x002adc53
_UIGestureRecognizerUpdateObserver + 927 11的CoreFoundation 0x00da989b
__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
+ 27 12的CoreFoundation 0x00d3e6e7 __CFRunLoopDoObservers + 295 13的CoreFoundation 0x00d071d7 __CFRunLoopRun + 1575 14的CoreFoundation 0x00d06840 CFRunLoopRunSpecific + 208 15的CoreFoundation 0x00d06761 CFRunLoopRunInMode + 97 16 GraphicsServices 0x010001c4 GSEventRunModal + 217 17 GraphicsServices 0x01000289 GSEventRun + 115 18 UIKit的0x00028c93 UIApplicationMain + 1160 19 0x000027a9主+ 121 20
0x00002725启动+ 53）投掷后终止叫'NSException'的实例
c $ c> ViewController 这个代码是从按钮被点击时仍然活着的？这样的错误（在这种情况下，不相关的对象 - UIImageView ）通常意味着你有一个指针指向已经释放和重用的内存的某个区域（<$
添加 NSLog（）打印输出到视图控制器的-dealloc方法，并确保在点击按钮之前没有触发。
实际上，添加一个NSLog到 configureBestSellItems - NSLog（@I am％x，self）; （yes，％x，not％@）。这将打印出您的视图控制器的地址 - 与崩溃对象的地址进行比较（如在无法识别的选择器发送到实例 0x681c2b0 - 看看它是否打印我是0x681c2b0最初）
I am getting the following error message which I cannot understand why its happening because I am not using any UIImageView. Sometimes I get the same error but its a CALayer?!?
Its worth also mentioning that I have 2 nibs and 2 controllers and a base controller where this code resides.
EDIT:
This is the structure of my project
MainViewController & its nib - HomeViewController in nib
MainViewController-Landscape & its nib - HomeViewController-Landscape in nib
HomeViewControllerBase - no nib - Base class where all outlets and item configuration code exists. - Outlets are used by both child classes below. - Outlets are linked to controls in each of the main nibs.
HomeViewController - Inherits from HomeViewControllerBase
HomeViewController-Landscape - Inherits from HomeViewControllerBase
So whats happening is that the child class is trying to dealloc its base class (which has all the outlets in it). I have designed it this way to avoid duplication of code in the different orientation viewcontrollers.
@implementation MainViewController
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) && !isShowingLandscapeView)
{
[self presentModalViewController:self.landscapeViewController
animated:YES];
isShowingLandscapeView = YES;
}
else if (UIDeviceOrientationIsPortrait(deviceOrientation) && isShowingLandscapeView)
{
[self dismissModalViewControllerAnimated:YES];
isShowingLandscapeView = NO;
}
}
- (id)init
{
self = [super initWithNibName:@"MainViewController" bundle:nil];
if (self)
{
isShowingLandscapeView = NO;
self.landscapeViewController = [[[MainViewController_Landscape alloc]
initWithNibName:@"MainViewController-Landscape" bundle:nil] autorelease];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
return self;
}
@end
@implementation HomeViewControllerBase
- (void)bestSellItemTapped:(id)sender
{
NSLog(@"best sell item tapped");
}
- (void)configureBestSellItems
{
[self startRetrievingRegions];
// load all the images from our bundle and add them to the scroll view
// NSUInteger i;
for (int i = 0; i <= 150; i++)
{
UILabel *itemTitle = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 50)];
itemTitle.text = @"Majorca";
UILabel *itemPrice = [[UILabel alloc]initWithFrame:CGRectMake(0, 50, 100, 50)];
itemPrice.text = @"£249";
NSString *imageName = @"tempImage.jpg";
UIImage *image = [UIImage imageNamed:imageName];
UIButton *mainButton = [[[UIButton alloc]init] autorelease];
[mainButton addTarget:self action:@selector(bestSellItemTapped:) forControlEvents:UIControlEventTouchUpInside];
[mainButton setBackgroundImage:image forState:UIControlStateNormal];
// setup each frame to a default height and width, it will be properly placed when we call "updateScrollList"
CGRect rect = mainButton.frame;
rect.size.height = kScrollObjHeight;
rect.size.width = kScrollObjWidth;
mainButton.frame = rect;
mainButton.tag = i;
[mainButton addSubview:itemTitle]; [itemTitle release];
[mainButton addSubview:itemPrice]; [itemPrice release];
[self.bestSellScrollView addSubview:mainButton];
}
[self layoutScrollImages]; // now place the photos in serial layout within the scrollview
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
[self configureBestSellItems];
}
- (void)layoutScrollImages
{
UIButton *view = nil;
NSArray *subviews = [self.bestSellScrollView subviews];
// reposition all image subviews in a horizontal serial fashion
CGFloat curXLoc = 0;
for (view in subviews)
{
if ([view isKindOfClass:[UIButton class]] && view.tag > 0)
{
CGRect frame = view.frame;
frame.origin = CGPointMake(curXLoc, 0);
view.frame = frame;
curXLoc += (kScrollObjWidth + kScrollObjPadding);
}
}
// set the content size so it can be scrollable
[self.bestSellScrollView setContentSize:CGSizeMake((150 * kScrollObjWidth),
[self.bestSellScrollView bounds].size.height)];
}
@end
@interface HomeViewController : HomeViewControllerBase
@end
@interface HomeViewController_Landscape : HomeViewControllerBase
@end
@implementation HomeViewController
- (void)dealloc
{
[super dealloc]; //When I remove this it works
}
@end
@implementation HomeViewController_Landscape
- (void)dealloc
{
[super dealloc]; //When I remove this it works
}
@end
-[UIImageView bestSellItemTapped:]: unrecognized selector sent to instance 0x681c2b0 2011-04-12 15:45:26.665 [21532:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImageView bestSellItemTapped:]: unrecognized selector sent to instance 0x681c2b0'
*** Call stack at first throw: ( 0 CoreFoundation 0x00dc85a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x00f1c313 objc_exception_throw + 44 2 CoreFoundation 0x00dca0bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x00d39966 ___forwarding___ + 966 4 CoreFoundation 0x00d39522 _CF_forwarding_prep_0 + 50 5 UIKit 0x0001a4fd -[UIApplication sendAction:to:from:forEvent:] + 119 6 UIKit 0x000aa799 -[UIControl sendAction:to:forEvent:] + 67 7 UIKit 0x000acc2b -[UIControl(Internal)
_sendActionsForEvents:withEvent:] + 527 8 UIKit 0x000ab7d8 -[UIControl touchesEnded:withEvent:] + 458 9 UIKit 0x002ad4de
_UIGestureRecognizerSortAndSendDelayedTouches
+ 3609 10 UIKit 0x002adc53
_UIGestureRecognizerUpdateObserver + 927 11 CoreFoundation 0x00da989b
__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
+ 27 12 CoreFoundation 0x00d3e6e7 __CFRunLoopDoObservers + 295 13 CoreFoundation 0x00d071d7 __CFRunLoopRun + 1575 14 CoreFoundation 0x00d06840 CFRunLoopRunSpecific + 208 15 CoreFoundation 0x00d06761 CFRunLoopRunInMode + 97 16 GraphicsServices 0x010001c4 GSEventRunModal + 217 17 GraphicsServices 0x01000289 GSEventRun + 115 18 UIKit 0x00028c93 UIApplicationMain + 1160 19 0x000027a9 main + 121 20
0x00002725 start + 53 ) terminate called after throwing an instance of 'NSException'
Is the whatever ViewController this code is from still alive when the button is tapped? An error like this (unrelated object - UIImageView in this case) usually means you have a pointer to some area of the memory that has been released and reused for something else (UIImageView in this case).
Add an NSLog() printout to the -dealloc method of the view controller and make sure it's not fired before you tap the button.
Actually, add one more NSLog to the beginning of configureBestSellItems - NSLog(@"I am %x", self); (yes, %x, not %@). This will print out the address of your view controller - compare it with the address of the crashing object (as in "unrecognized selector sent to instance 0x681c2b0" - see if it prints "I am 0x681c2b0" initially)
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