Exporting a photo to Instagram - iphone

Question

I am trying to export a photo from my application to Instagram, using this code:
// Capture Screenshot
UIGraphicsBeginImageContextWithOptions(self.view.frame.size,self.view.opaque,0.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
NSString *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/test.igo"];
NSURL *igImageHookFile = [[NSURL alloc] initWithString:[[NSString alloc] initWithFormat:#"file://%#", jpgPath]];
dic = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:igImageHookFile]];
dic.UTI = #"com.instagram.photo";
dic.annotation = [NSDictionary dictionaryWithObject:#"my caption" forKey:#"InstagramCaption"];
NSURL *instagramURL = [NSURL URLWithString:#"instagram://app"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
[[UIApplication sharedApplication] openURL:instagramURL];
} else {
NSLog(#"No Instagram Found");
}
But it is not working. It crashes with the following error:
2013-01-19 20:40:41.948 Ayat[12648:c07] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[NSURL initFileURLWithPath:]: nil string parameter'
I am not sure I'm properly:
1- Saving jpgpath as the screenshot I took .
2- Passing the "dic" document to Instagram.

Answer 1

In my app, I have also export photo to Instagram. (Image must be larger than 612x612 size)
Try this code:
-(void)shareImageOnInstagram:(UIImage*)shareImage
{
//Remember Image must be larger than 612x612 size if not resize it.
NSURL *instagramURL = [NSURL URLWithString:#"instagram://app"];
if([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
NSString *documentDirectory=[NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:#"Image.ig"];
NSData *imageData=UIImagePNGRepresentation(shareImage);
[imageData writeToFile:saveImagePath atomically:YES];
NSURL *imageURL=[NSURL fileURLWithPath:saveImagePath];
UIDocumentInteractionController *docController=[[UIDocumentInteractionController alloc]init];
docController.delegate=self;
[docController retain];
docController.UTI=#"com.instagram.photo";
docController.annotation=[NSDictionary dictionaryWithObjectsAndKeys:#"Image Taken via #App",#"InstagramCaption", nil];
[docController setURL:imageURL];
[docController presentOpenInMenuFromBarButtonItem:self.navigationItem.rightBarButtonItem animated:YES]; //Here try which one is suitable for u to present the doc Controller. if crash occurs
}
else
{
NSLog (#"Instagram not found");
}
}
I hope this will helps you.

Answer 2

On this line
dic = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:igImageHookFile]];
you are calling fileURLWithPath:. For a start this expects an NSString, not an NSURL, but from your error message it looks like igImageHookFile is nil.

Answer 3

It took a bunch of research but I finally found this at this site that helped. I just trimmed it up a bit to not include the caption as that was his original problem... but if you're only putting in the picture, here it is:
-(void)shareImageOnInstagram
{
//Remember Image must be larger than 612x612 size if not resize it.
NSURL *instagramURL = [NSURL URLWithString:#"instagram://app"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]){
NSString *urlString = [[NSString alloc] initWithFormat:#"file://%#", blendedImageURL];
NSURL *imageUrl = [[NSURL alloc] initWithString: urlString];
self.docController = [self setupControllerWithURL:imageUrl usingDelegate:self];
self.docController.UTI = #"com.instagram.exclusivegram";
// self.docController.annotation = [NSDictionary dictionaryWithObject:#"I want to share this text" forKey:#"InstagramCaption"];
[self.docController presentOpenInMenuFromRect: self.view.frame inView: self.view animated: YES ];}
}

Answer 4

I tried the following code and it worked:
- (void) shareImageWithInstagram
{
NSURL *instagramURL = [NSURL URLWithString:#"instagram://"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
UICachedFileMgr* mgr = _gCachedManger;
UIImage* photoImage = [mgr imageWithUrl:_imageView.image];
NSData* imageData = UIImagePNGRepresentation(photoImage);
NSString* captionString = [NSString stringWithFormat:#"%#%#",self.approvedData.approvedCaption,self.approvedData.tag];
NSString* imagePath = [UIUtils documentDirectoryWithSubpath:#"image.igo"];
[imageData writeToFile:imagePath atomically:NO];
NSURL* fileURL = [NSURL fileURLWithPath:[NSString stringWithFormat:#"file://%#",imagePath]];
self.docFile = [[self setupControllerWithURL:fileURL usingDelegate:self]retain];
self.docFile.annotation = [NSDictionary dictionaryWithObject: captionString
forKey:#"InstagramCaption"];
self.docFile.UTI = #"com.instagram.photo";
// OPEN THE HOOK
[self.docFile presentOpenInMenuFromRect:self.view.frame inView:self.view animated:YES];
}
else
{
[UIUtils messageAlert:#"Instagram not installed in this device!\nTo share image please install instagram." title:nil delegate:nil];
}
}