iphone - Apple Mach-O 链接器错误 (APActivityIcon)

我有问题!对不起，我是编程新手，我不知道该怎么做。我实现了一些代码来自定义我的 ActivitiViewController。我创建了一个新类，并将其链接到我的代码:

  - (IBAction)share:(id)sender
 {
     Class avcClass = NSClassFromString(@"UIActivityViewController");
     if (avcClass) {

         APActivityProvider *ActivityProvider = [[APActivityProvider alloc] init];
         UIImage *ImageAtt = [UIImage imageNamed:@"MyApp Icon 512x512.png"];
         NSArray *Items = @[ActivityProvider, ImageAtt];


         APActivityIcon *ca = [[APActivityIcon alloc] init];
         NSArray *Acts = @[ca];

         UIActivityViewController *ActivityView = [[UIActivityViewController alloc]
                                                    initWithActivityItems:Items
                                                    applicationActivities:Acts];
         [ActivityView setExcludedActivityTypes:
          @[UIActivityTypeAssignToContact,
          UIActivityTypeCopyToPasteboard,
          UIActivityTypePrint,
          UIActivityTypeSaveToCameraRoll,
          UIActivityTypePostToWeibo]];

         [self presentViewController:ActivityView animated:YES completion:nil];
         [ActivityView setCompletionHandler:^(NSString *act, BOOL done)
          {
              NSString *ServiceMsg = nil;
              if ( [act isEqualToString:UIActivityTypeMail] )           ServiceMsg = @"Mail sended!";
              if ( [act isEqualToString:UIActivityTypePostToTwitter] )  ServiceMsg = @"Post on twitter, ok!";
              if ( [act isEqualToString:UIActivityTypePostToFacebook] ) ServiceMsg = @"Post on facebook, ok!";
              if ( [act isEqualToString:UIActivityTypeMessage] )        ServiceMsg = @"SMS sended!";
              if ( done )
              {
                  UIAlertView *Alert = [[UIAlertView alloc] initWithTitle:ServiceMsg message:@"" delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil];
                  [Alert show];


          }}];

.........但是，我运行代码，还是报错!我创建的两个文件名为 APActivityProvider。所以现在我得到了那个错误并且不知道如何处理这个。我的架构有什么错误？

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