instagram.m

- (void)shareImageToInstagram:(UIImage *)image inView:(UIView *)view
{
    NSURL * instagramURL = [NSURL URLWithString:@"instagram://"];
    
    if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
    {
        NSString * documentDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        NSString * saveImagePath = [documentDirectory stringByAppendingPathComponent:@"Image.igo"];
        NSData * imageData = UIImagePNGRepresentation(image);
        
        [imageData writeToFile:saveImagePath atomically:YES];
        NSURL * imageURL = [NSURL fileURLWithPath:saveImagePath];
        
        self.docController = [UIDocumentInteractionController interactionControllerWithURL:imageURL];
        self.docController.delegate = self;
        self.docController.UTI = kInstagramUTI;
        [self.docController presentOpenInMenuFromRect:CGRectMake(1, 1, 1, 1) inView:view animated:YES];
    }
}