UIActivityViewController背景颜色

enter image description here 所以我在我的应用程序中有一个UIActivityViewController。如何更改背景颜色。而且我也很快如何添加Facebook和Twitter到我的UIActivityViewController。UIActivityViewController背景颜色

验证码：

- (IBAction)Social:(id)sender { 
      UIActivityViewController *social = [[UIActivityViewController alloc]initWithActivityItems:[NSArray arrayWithObjects:@"Travel+ Rocks",nil] applicationActivities:nil]; 
      social.excludedActivityTypes = @[UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypePostToWeibo,UIActivityTypePrint]; 
      [self presentViewController:social animated:YES completion:nil]; 
      [social setCompletionHandler:^(NSString *activityType, BOOL completed) 
      { 
       NSLog(@"Activity = %@",activityType); 
       NSLog(@"Completed Status = %d",completed); 

       if (completed) 
       { 
        // UIAlertView *objalert = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Your Posts were sucessful" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
        // [objalert show]; 
        // objalert = nil; 
       }else 
       { 
        // UIAlertView *objalert = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Your Posts weren't sucessful" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
        // [objalert show]; 
        // objalert = nil; 



       } 
      }]; 
     }

这件代码的修复背景Eror：

NSString *message = [NSString stringWithFormat:@""]; 
    NSString *textToShare = message; 
    UIImage *imageToShare = [UIImage imageNamed:@""]; 
    NSArray *activityItems = [[NSArray alloc] initWithObjects:textToShare, imageToShare,nil]; 
    UIActivity *activity = [[UIActivity alloc] init]; 
    NSArray *applicationActivities = [[NSArray alloc] initWithObjects:activity, nil]; 
    UIActivityViewController *activityVC = 
    [[UIActivityViewController alloc] initWithActivityItems:activityItems 
    applicationActivities:applicationActivities]; 
    [self presentViewController:activityVC animated:YES completion:nil];

来源

2012-11-25 Programmer...