Xcode 错误实例方法 -addAttachment with ImageNamed 未找到

Question

我的项目中遇到错误，我收到Xcode错误实例方法-addAttachment与图像命名未找到，下面是我的一些代码：

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

我在实施行和此处收到警报警告：

[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"];

该项目仍在运行，但有这 6 个警告。

任何帮助都非常感谢。

谢谢

Answer 1

确保您的类AttachmentItem在其头文件中声明addAttachment:withImageNamed:

Answer 2

首先：

• 警告说了什么？

我认为正在发生的事情是您应该在.m文件中导入GalleryScrollView。由于您正在尝试使用该特定类中的方法，因此我猜Xcode无法看到它具有-addAttachment:withImageNamed:。这就是为什么它运行正常（该方法实际上存在），但会发出警告，因为从HegakaDragAndDropRecycleBinViewController你看不到它。此外，应将警告视为错误。这可以帮助您解决开发后期可能发生的令人讨厌的事情。