With this Swift code example I would like to share with you how to implement Facebook Share Photo button which will share a photo user selects to user’s Facebook timeline. The two code examples below will cover:

• Set up UIButton to trigger the UIImagePickerController to let user select photo they would like to share.
• Create UIImageView to preview the selected image
• Use FBSDKSharePhoto to create a sharable photo object
• Use FBSDKSharePhotoContent to set an array of photo objects. User can share multiple photos to their Facebook time line if FBSDKSharePhotoContent.photos is given more than one photo object.
• Add Facebook share button FBSDKShareButton as subview to main view

Here is how the below code example will look like if you run the complete code example provided below.

Here is a short Swift code example which demonstrates how to pick image from iOS UIImagePickerController and use it with Facebook SDK for iOS to share selected photo to Facebook timeline.

Facebook iOS SDK. Share photo Swift Code Example.

  
 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
    {
        myImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
        myImageView.backgroundColor = UIColor.clearColor()
        myImageView.contentMode = UIViewContentMode.ScaleAspectFit
        self.dismissViewControllerAnimated(true, completion: nil)
        
        let photo:FBSDKSharePhoto = FBSDKSharePhoto()
 
        photo.image = myImageView.image
        photo.userGenerated = true
        
        let content:FBSDKSharePhotoContent = FBSDKSharePhotoContent()
        content.photos = [photo]
        
        let shareButton = FBSDKShareButton()
        shareButton.center = view.center
        
        shareButton.shareContent = content
        
        shareButton.center = self.view.center
        self.view.addSubview(shareButton)
        
    }

If you are looking for a complete Swift code example you can copy and paste, here is a complete ViewController with Facebook iOS Framework import statements. All you need to do is to copy and paste it into your project.

Facebook SDK for iOS. Share Photo Button Complete Swift Code Example.

  
 
import UIKit
import FBSDKCoreKit
import FBSDKShareKit

class SharePhotoViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate{

    var myImageView: UIImageView!
    var showImagePicketButton: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
        setupImagePickerButton()
        
        setupImageView()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    func setupImagePickerButton()
    {
        let button = UIButton(type: UIButtonType.System) as UIButton
        
        let screenSize: CGRect = UIScreen.mainScreen().bounds
        let screenWidth = screenSize.width
 
        let buttonWidth:CGFloat = 150
        let buttonHeight:CGFloat = 45
        let xPostion:CGFloat = (screenWidth/2)-(buttonWidth/2)
        let yPostion:CGFloat = 70
        
        button.frame = CGRectMake(xPostion, yPostion, buttonWidth, buttonHeight)
        
        button.backgroundColor = UIColor.lightGrayColor()
        button.setTitle("Select photo", forState: UIControlState.Normal)
        button.tintColor = UIColor.blackColor()
        button.addTarget(self, action: #selector(SharePhotoViewController.displayImagePickerButtonTapped) , forControlEvents: .TouchUpInside)
        self.view.addSubview(button)
    }
    
    func setupImageView()
    {
        myImageView = UIImageView()
        
        let screenSize: CGRect = UIScreen.mainScreen().bounds
        let screenWidth = screenSize.width
        
        let imageWidth:CGFloat = 200
        let imageHeight:CGFloat = 200
        
        let xPostion:CGFloat = (screenWidth/2) - (imageWidth/2)
        let yPostion:CGFloat = 100
        
        myImageView.frame = CGRectMake(xPostion, yPostion, imageWidth, imageHeight)
        
        self.view.addSubview(myImageView)
    }
    
    func displayImagePickerButtonTapped() {
        
        let myPickerController = UIImagePickerController()
        myPickerController.delegate = self;
        myPickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        
        self.presentViewController(myPickerController, animated: true, completion: nil)
        
    }
    
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
    {
        myImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
        myImageView.backgroundColor = UIColor.clearColor()
        myImageView.contentMode = UIViewContentMode.ScaleAspectFit
        self.dismissViewControllerAnimated(true, completion: nil)
        
        let photo:FBSDKSharePhoto = FBSDKSharePhoto()
 
        photo.image = myImageView.image
        photo.userGenerated = true
        
        let content:FBSDKSharePhotoContent = FBSDKSharePhotoContent()
        content.photos = [photo]
        
        let shareButton = FBSDKShareButton()
        shareButton.center = view.center
        
        shareButton.shareContent = content
        
        shareButton.center = self.view.center
        self.view.addSubview(shareButton)
        
    }

}

Checkout more Swift code examples at Swift Code Examples page.

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