Post UIImage to Instagram using Swift similar to SLComposeViewController

Question

I have an iOS Xcode 7 Swift 2 project I'm working on. The app posts photos to Facebook and Twitter using:

var shareToFacebook: SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)

and

var shareToTwitter: SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)

Love how easy and simple for just posting a photo to these two social medias. I didn't need or want the APIs for them.

I want to do something similar and simple for Instagram . What is the best way to do this without having to deal with Instagram API ? Or do I have no choice?

My photo data is saved using NSCoding , not in the DocumentDirectory . I looked here for integration but this is for a photo saved in the app directory .

Just something simple like what I already have for Facebook and Twitter.

Answer 1

Updated for Swift 3

import UIKit
import Foundation

class InstagramManager: NSObject, UIDocumentInteractionControllerDelegate {

    private let kInstagramURL = "instagram://app"
    private let kUTI = "com.instagram.exclusivegram"
    private let kfileNameExtension = "instagram.igo"
    private let kAlertViewTitle = "Error"
    private let kAlertViewMessage = "Please install the Instagram application"

    var documentInteractionController = UIDocumentInteractionController()

    // singleton manager
    class var sharedManager: InstagramManager {
        struct Singleton {
            static let instance = InstagramManager()
        }
        return Singleton.instance
    }

    func postImageToInstagramWithCaption(imageInstagram: UIImage, instagramCaption: String, view: UIView) {
        // called to post image with caption to the instagram application

        let instagramURL = NSURL(string: kInstagramURL)

        if UIApplication.shared.canOpenURL(instagramURL! as URL) {

            let jpgPath = (NSTemporaryDirectory() as NSString).appendingPathComponent(kfileNameExtension)

            do {
                try UIImageJPEGRepresentation(imageInstagram, 1.0)?.write(to: URL(fileURLWithPath: jpgPath), options: .atomic)

            } catch {

                print(error)
            }

            let rect = CGRect(x: 0, y: 0, width: 612, height: 612)
            let fileURL = NSURL.fileURL(withPath: jpgPath)
            documentInteractionController.url = fileURL
            documentInteractionController.delegate = self
            documentInteractionController.uti = kUTI

            // adding caption for the image
            documentInteractionController.annotation = ["InstagramCaption": instagramCaption]
            documentInteractionController.presentOpenInMenu(from: rect, in: view, animated: true)
        } else {

            /// display some message about how it didn't work
            /// Like: UIAlertController(title: kAlertViewTitle, message: kAlertViewMessage, preferredStyle: .alert)
        }
    }
}

and then in the ViewController you want to call it in...

InstagramManager.sharedManager.postImageToInstagramWithCaption(imageInstagram: <YOUR IMAGE>, instagramCaption: shareText, view: self.view)

This opens the 'open-in' function if Instagram is installed

Answer 2

I looked here and found a solution:

I created an NSObject :

import UIKit
import Foundation

class InstagramManager: NSObject, UIDocumentInteractionControllerDelegate {

    private let kInstagramURL = "instagram://app"
    private let kUTI = "com.instagram.exclusivegram"
    private let kfileNameExtension = "instagram.igo"
    private let kAlertViewTitle = "Error"
    private let kAlertViewMessage = "Please install the Instagram application"

    var documentInteractionController = UIDocumentInteractionController()

    // singleton manager
    class var sharedManager: InstagramManager {
        struct Singleton {
            static let instance = InstagramManager()
        }
        return Singleton.instance
    }

    func postImageToInstagramWithCaption(imageInstagram: UIImage, instagramCaption: String, view: UIView) {
        // called to post image with caption to the instagram application

        let instagramURL = NSURL(string: kInstagramURL)
        if UIApplication.sharedApplication().canOpenURL(instagramURL!) {
            let jpgPath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent(kfileNameExtension)
            UIImageJPEGRepresentation(imageInstagram, 1.0)!.writeToFile(jpgPath, atomically: true)
            let rect = CGRectMake(0,0,612,612)
            let fileURL = NSURL.fileURLWithPath(jpgPath)
            documentInteractionController.URL = fileURL
            documentInteractionController.delegate = self
            documentInteractionController.UTI = kUTI

            // adding caption for the image
            documentInteractionController.annotation = ["InstagramCaption": instagramCaption]
            documentInteractionController.presentOpenInMenuFromRect(rect, inView: view, animated: true)
        } else {

            // alert displayed when the instagram application is not available in the device
            UIAlertView(title: kAlertViewTitle, message: kAlertViewMessage, delegate:nil, cancelButtonTitle:"Ok").show()
        }
    }

}

Then in my @IBAction I used:

let image = self.photoImageView.image
InstagramManager.sharedManager.postImageToInstagramWithCaption(image!, instagramCaption: "\(self.description)", view: self.view)

This opens bring a menu up with the 'open-in' style and the user can open the app in Instagram (if installed).

Answer 3

Here is a reusable class with swift 4+. Working in Xcode 10.1.

1. Make swift empty file.

2. copy and paste the below code into the file.

    import UIKit import Foundation class InstagramHelper: NSObject, UIDocumentInteractionControllerDelegate { private let kInstagramURL = "instagram://den3079" private let kUTI = "com.instagram.exclusivegram" private let kfileNameExtension = "instagram.igo" private let kAlertViewTitle = "Error" private let kAlertViewMessage = "Please install the Instagram application" var documentInteractionController = UIDocumentInteractionController() // singleton manager class var sharedManager: InstagramHelper { struct Singleton { static let instance = InstagramHelper() } return Singleton.instance } func postImageToInstagramWithCaption(imageInstagram: UIImage, instagramCaption: String, controller: UIViewController) { // called to post image with caption to the instagram application let instagramURL = URL(string: kInstagramURL) DispatchQueue.main.async { if UIApplication.shared.canOpenURL(instagramURL!) { let jpgPath = (NSTemporaryDirectory() as NSString).appendingPathComponent(self.kfileNameExtension) if let jpegData = UIImageJPEGRepresentation(imageInstagram, 1.0) { do { try jpegData.write(to: URL(fileURLWithPath: jpgPath), options: .atomicWrite) } catch { print("write image failed") } }else { let jpegData = UIImagePNGRepresentation(imageInstagram) do { try jpegData?.write(to: URL(fileURLWithPath: jpgPath), options: .atomicWrite) } catch { print("write image failed") } } let fileURL = NSURL.fileURL(withPath: jpgPath) self.documentInteractionController.url = fileURL self.documentInteractionController.delegate = self self.documentInteractionController.uti = self.kUTI // adding caption for the image self.documentInteractionController.annotation = ["InstagramCaption": instagramCaption] self.documentInteractionController.presentOpenInMenu(from: controller.view.frame, in: controller.view, animated: true) } else { // alert displayed when the instagram application is not available in the device self.showAlert("", message: self.kAlertViewMessage, controller: controller) } } } func showAlert(_ title: String, message: String, controller : UIViewController){ let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert) let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: { action -> Void in //Just dismiss the action sheet let selector: Selector = NSSelectorFromString("alertOkButtonHandler") if controller.responds(to: selector){ _ = controller.perform(selector) } }) alert.addAction(okAction) controller.present(alert, animated: true, completion: nil) }} 

And use of this function in ViewController class.

InstagramHelper.sharedManager.postImageToInstagramWithCaption(imageInstagram: img!, instagramCaption: "www.google.com", controller: self)