Xcode 错误实例方法 - addAttachment withImageNamed not found答案

【问题标题】：Xcode Error Instance Method -addAttachment withImageNamed not foundXcode 错误实例方法 - addAttachment withImageNamed not found
【发布时间】：2012-11-12 08:26:40
【问题描述】：

我的项目出现错误，我收到 Xcode 错误实例方法 -addAttachment withImageNamed not found，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"];

项目仍在运行，但有这 6 个警告。

非常感谢任何帮助。

谢谢

【问题讨论】：

标签： iphone objective-c ios xcode compiler-errors

【解决方案1】：

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

【讨论】：

【解决方案2】：

首先：

警告说明了什么？

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，我猜 Xcode 无法看到它具有-addAttachment:withImageNamed:。这就是它运行正常的原因（该方法实际上存在），但会发出警告，因为从HegakaDragAndDropRecycleBinViewController 你看不到它。另外，您应该treat warnings as errors。这可以帮助您解决在开发后期可能发生的令人讨厌的事情。

【讨论】：