Ios FBSDKMessengerSharer共享图像，但不提供任何返回应用程序的选项

我正在使用图片共享

下面的代码工作正常，但当共享完成后，它不会显示任何返回到我的应用程序的按钮

UIImage *image = [UIImage imageNamed:@"selfie_pic"];
[FBSDKMessengerSharer shareImage:image withOptions:nil];
NSString *filepath = [[NSBundle mainBundle] pathForResource:@"corgi" ofType:@"webp"];
NSData *webpData = [NSData dataWithContentsOfFile:filepath];
[FBSDKMessengerSharer shareAnimatedWebP:webpData withOptions:nil];

---

共享图片后，我想设置标志，以便确定用户是否已在facebook上发送邮件。

为了使此代码正常工作，请进行以下更改：

FBSDKSharePhoto *photo = [[FBSDKSharePhoto alloc] init];
photo.image = yourUIImage;
photo.userGenerated = YES;
FBSDKSharePhotoContent *content = [[FBSDKSharePhotoContent alloc] init];
content.photos = @[photo];

[FBSDKMessageDialog showWithContent:content delegate:self];

添加委托方法

#pragma mark === delegate method
- (void)sharer:(id<FBSDKSharing>)sharer didCompleteWithResults:(NSDictionary *)results{
    NSLog(@"Share Completed:%@", results);
}
- (void)sharer:(id<FBSDKSharing>)sharer didFailWithError:(NSError *)error{
 NSLog(@"Error Occured:%@", error);
}
-(void)sharerDidCancel:(id<FBSDKSharing>)sharer{
    NSLog(@"Sharing Cancelled");
}

- (void)applicationDidBecomeActive:(UIApplication *)application{
   [FBSDKAppEvents activateApp];
 }


 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication
              annotation:(id)annotation {                         
return [[FBSDKApplicationDelegate sharedInstance] application:application openURL:url sourceApplication:sourceApplication annotation:annotation];
        }


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 return [ [FBSDKApplicationDelegate sharedInstance] application :application didFinishLaunchingWithOptions:launchOptions];
}