Xcode的錯誤實例方法-addAttachment withImageNamed沒有找到

Question

我有在我的項目一個錯誤，我得到的Xcode錯誤實例方法-addAttachment withImageNamed沒有找到，下面是我的一些代碼：

HegakaDragAndDropRecycleBinViewController.h

@interface HegakaDragAndDropRecycleBinViewController : UIViewController { 
IBOutlet GalleryScrollView *gallery; 

} 
-(NSString*)withImageNamed; 

@property (nonatomic, retain) IBOutlet GalleryScrollView *gallery; 
@end 

HegakaDragAndDropRecycleBinViewController.m

#import "HegakaDragAndDropRecycleBinViewController.h" 
#import "AttachmentItem.h" 

@implementation HegakaDragAndDropRecycleBinViewController 

@synthesize gallery; 

- (void)dealloc 
{ 
[super dealloc]; 
} 

- (void)didReceiveMemoryWarning 
{ 
// Releases the view if it doesn't have a superview. 
[super didReceiveMemoryWarning]; 

// Release any cached data, images, etc that aren't in use. 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
self.gallery.mainView = self.view; 


AttachmentItem *item = [[AttachmentItem alloc] initWithData:1 data:nil]; 
[self.gallery addAttachment:item withImageNamed:@"recyclebin"]; 
[self.gallery addAttachment:item withImageNamed:@"canadian-maple"]; 
[self.gallery addAttachment:item withImageNamed:@"light-cherry"]; 
[self.gallery addAttachment:item withImageNamed:@"mozambique-wenge"]; 
[self.gallery addAttachment:item withImageNamed:@"canadian-maple"]; 

[item release]; 
} 

- (void)viewDidUnload 
{ 
[super viewDidUnload]; 
// Release any retained subviews of the main view. 
// e.g. self.myOutlet = nil; 
} 

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
// Return YES for supported orientations 
return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

@end 

我得到我的警報在履行線，在這裏警告：

[self.gallery addAttachment:item withImageNamed:@"recyclebin"]; 
[self.gallery addAttachment:item withImageNamed:@"canadian-maple"]; 
[self.gallery addAttachment:item withImageNamed:@"light-cherry"]; 
[self.gallery addAttachment:item withImageNamed:@"mozambique-wenge"]; 
[self.gallery addAttachment:item withImageNamed:@"canadian-maple"]; 

該項目仍然運行，但有這6個警告。

任何援助非常感謝。

感謝

Answer 1

確保您的類AttachmentItem在其頭文件中聲明addAttachment:withImageNamed:

Answer 2

首先：

• 是什麼警告說？

我認爲正在發生的事情是，你應該導入GalleryScrollView在.m文件。既然你要使用的方法從特定的類，我想Xcode的，是不是能看到它-addAttachment:withImageNamed:。這就是爲什麼它運行正常（該方法存在的事實），但給出了一個警告，因爲從HegakaDragAndDropRecycleBinViewController你看不到它。另外，你應該treat warnings as errors。這可以幫助你解決在開發過程中可能發生的骯髒事情。