如何在iOS上分享照片到Facebook？

Question

我试图在Facebook上分享图片，但我不能。这是我正在使用的代码：

if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) { 
    SLComposeViewController * fbSheetOBJ = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook]; 

    SLComposeViewControllerCompletionHandler myBlock = 
    ^(SLComposeViewControllerResult result){ 
     [fbSheetOBJ dismissViewControllerAnimated:YES completion:nil]; 
    }; 
    fbSheetOBJ.completionHandler = myBlock; 

    [fbSheetOBJ addURL:[NSURL URLWithString:@"http://www.test.com"]]; 
    [fbSheetOBJ setInitialText:@"Post from my iOS application"]; 
    [fbSheetOBJ addImage:[UIImage imageNamed:@"download.jpeg"]]; 

    [self presentViewController:fbSheetOBJ animated:YES completion:Nil]; 
} 

Answer 1

如果（[SLComposeViewController isAvailableForServiceType：SLServiceTypeFacebook]）{

SLComposeViewController * mySLComposerSheet = [SLComposeViewController composeViewControllerForServiceType：SLServiceTypeFacebook];

  NSString *desc = @"the Text what you want to post in in facebook";     
      [mySLComposerSheet addURL:[NSURL URLWithString:@"yourLink"]]; 
      [mySLComposerSheet setInitialText:desc]; 
      //convert any type of image to png format 

//图片URL在Facebook上发布。我们可以通过下面的例子来介绍一下NSData的数据类型：[NSURL URLWithString：[self.imageurl stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]]];

  UIImage *image = [UIImage imageWithData:data]; 
      data = UIImagePNGRepresentation(image); 
      UIImage *pngImage = [UIImage imageWithData:data]; 



      // image convertion ends.. 

      [mySLComposerSheet addImage: image]; 

      [mySLComposerSheet setCompletionHandler:^(SLComposeViewControllerResult result) { 

       switch (result) { 
        case SLComposeViewControllerResultCancelled: 

        alert = [[UIAlertView alloc]initWithTitle:@"Cancelled" message:@"You Cancelled posting the Deal." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles: nil]; 
         [alert show]; 
         [alert release]; 
         break; 
        case SLComposeViewControllerResultDone: 

         alert1 = [[UIAlertView alloc]initWithTitle:@"Success" message:@"The Deal was posted successfully." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles: nil]; 
         [alert1 show]; 
         [alert1 release]; 
         break; 

        default: 
         break; 
       } 
      }]; 

      [self presentViewController:mySLComposerSheet animated:YES completion:nil]; 
     } 

Answer 2

尝试此

如果（[SLComposeViewController isAvailableForServiceType：SLServiceTypeFacebook]）{

SLComposeViewController * mySLComposerSheet = [SLComposeViewController composeViewControllerForServiceType：SLServiceTypeFacebook];

  NSString *desc = @"the Text what you want to post in in facebook";     
      [mySLComposerSheet addURL:[NSURL URLWithString:@"yourLink"]]; 
      [mySLComposerSheet setInitialText:desc]; 
      //convert any type of image to png format 

//图片URL在Facebook上发布。我们可以通过下面的例子来介绍一下NSData的数据类型：[NSURL URLWithString：[self.imageurl stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]]];

  UIImage *image = [UIImage imageWithData:data]; 
      data = UIImagePNGRepresentation(image); 
      UIImage *pngImage = [UIImage imageWithData:data]; 



      // image convertion ends.. 

      [mySLComposerSheet addImage: image]; 

      [mySLComposerSheet setCompletionHandler:^(SLComposeViewControllerResult result) { 

       switch (result) { 
        case SLComposeViewControllerResultCancelled: 

        alert = [[UIAlertView alloc]initWithTitle:@"Cancelled" message:@"You Cancelled posting the Deal." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles: nil]; 
         [alert show]; 
         [alert release]; 
         break; 
        case SLComposeViewControllerResultDone: 

         alert1 = [[UIAlertView alloc]initWithTitle:@"Success" message:@"The Deal was posted successfully." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles: nil]; 
         [alert1 show]; 
         [alert1 release]; 
         break; 

        default: 
         break; 
       } 
      }]; 

      [self presentViewController:mySLComposerSheet animated:YES completion:nil]; 
     }