爲「WHMailActivity」不可見@interface聲明選擇「activityDidFinish：」

Question

我的錯誤它「WHMailActivity」不可見@interface聲明選擇「activityDidFinish：」

，我收到了一個晚上，但我沒有成功。 。 。爲什麼在其他地方如此使用，但我不能。 。 。 我希望能幫助我。 。 。

在此先感謝！

這一點，我的.h

#import <Foundation/Foundation.h> 
#import <MessageUI/MessageUI.h> 
#import "WHMailActivityItem.h" 

@interface WHMailActivity : UIViewController 

@end 

，這是我的.m

#import "WHMailActivity.h" 

@interface WHMailActivity() <MFMailComposeViewControllerDelegate> 

@property (nonatomic, strong)WHMailActivityItem *activityItem; 

@end 


@implementation WHMailActivity 

#pragma mark - UIActivity Overrides 

- (NSString *)activityType { 
    return NSStringFromClass([self class]); 
} 

- (NSString *)activityTitle { 
    return NSLocalizedString(@"Mail", @"title for Mail activity item"); 
} 

- (UIImage *)activityImage { 
    return [UIImage imageNamed:@"mailActivity.png"]; 
} 

- (BOOL)canPerformWithActivityItems:(NSArray *)activityItems { 
    if (![MFMailComposeViewController canSendMail]) { 
     return NO; 
    } 

    for (id item in activityItems) { 
     if ([item isKindOfClass:[WHMailActivityItem class]]) { 
      return YES; 
     } 
    } 

    return NO; 
} 

- (void)prepareWithActivityItems:(NSArray *)activityItems { 
    for (id item in activityItems) { 
     if ([item isKindOfClass:[WHMailActivityItem class]]){ 
      self.activityItem = item; 
     } 
    } 
} 

- (UIViewController *)activityViewController { 
    MFMailComposeViewController *composeController = [[MFMailComposeViewController alloc] init]; 

    if (self.activityItem.onMailActivitySelected) { 
     self.activityItem.onMailActivitySelected(composeController); 
    } 

    composeController.mailComposeDelegate = self; 
    return composeController; 

     [self performSelector:@selector(mailComposeController)]; 
} 

#pragma mark - MFMailComposeViewControllerDelegate 

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { 
    [self activityDidFinish:result == MFMailComposeResultSent]; 
} 

@end 

Answer 1

在您的.h文件中您有：

@interface WHMailActivity : UIViewController 

，但它應該是：

@interface WHMailActivity : UIActivity 

假設班級是自定義UIActivity。