Pinterest integration in ios app?

I am trying to post image from my app on pinterest.From last five days i am looking for perfect solution finally after posting some question on SO now i am inch away to solve my problem.the issue is when i post any image using url its successfuly post my image on pinterest as my below code show.

-(NSString*) generatePinterestHTML {
NSString *description = @"Post your description here";
NSString *sUrl = [NSString stringWithFormat:@"http://4.bp.blogspot.com/-w4oTZjlpgwo/T5_pi-KJPuI/AAAAAAAAAoM/rKm3E0XCbgY/s1600/flower.png"];
NSLog(@"URL:%@", sUrl);
NSString *protectedUrl = (__bridge NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,(__bridge CFStringRef)sUrl, NULL, (CFStringRef)@"!'\"();:@&=+$,/?%#[]% ",CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
NSLog(@"Protected URL:%@", protectedUrl);
NSString *imageUrl = [NSString stringWithFormat:@"\"%@\"", sUrl];
NSString *buttonUrl = [NSString stringWithFormat:@"\"http://pinterest.com/pin/create/button/?url=www.flor.com&media=%@&description=%@\"", protectedUrl, description];

NSMutableString *htmlString = [[NSMutableString alloc] initWithCapacity:1000];
[htmlString appendFormat:@"<html> <body>"];
[htmlString appendFormat:@"<p align=\"center\"><a href=%@ class=\"pin-it-button\" count-layout=\"horizontal\"><img border=\"0\" src=\"http://assets.pinterest.com/images/PinExt.png\" title=\"Pin It\" /></a></p>", buttonUrl];
[htmlString appendFormat:@"<p align=\"center\"><img width=\"400px\" height = \"400px\" src=%@></img></p>", imageUrl];
[htmlString appendFormat:@"<script type=\"text/javascript\" src=\"//assets.pinterest.com/js/pinit.js\"></script>"];
[htmlString appendFormat:@"</body> </html>"];
return htmlString;
}
-(void)viewDidLoad
{
 [super viewDidLoad];
NSString *htmlString = [self generatePinterestHTML];
NSLog(@"Generated HTML String:%@", htmlString);
mywebview.backgroundColor = [UIColor clearColor];
mywebview.opaque = NO;
if ([mywebview isHidden]) {
    [mywebview setHidden:NO];
}
[mywebview loadHTMLString:htmlString baseURL:nil];
}

below screen shot show my above code result

But when i am trying to upload image from my app its not works fine here is my code

 - (void)viewDidLoad
 {
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
savedImagePath = [[documentsDirectory stringByAppendingPathComponent:@"savedImage.png"] mutableCopy];
NSLog(@"savedImagePath..%@",savedImagePath);
NSData*  imageData = UIImagePNGRepresentation(mypimage);
[imageData writeToFile:savedImagePath atomically:YES];
[super viewDidLoad];
NSString *htmlString = [self generatePinterestHTML];
NSLog(@"Generated HTML String:%@", htmlString);
mywebview.backgroundColor = [UIColor clearColor];
mywebview.opaque = NO;
if ([mywebview isHidden]) {
    [mywebview setHidden:NO];
}
[mywebview loadHTMLString:htmlString baseURL:nil];
}
- (NSString*) generatePinterestHTML {
NSString *description = @"Post your description here";
NSString *stringUrl = [NSString stringWithFormat:@"%@",savedImagePath];
NSLog(@"stringUrl:%@", stringUrl);
NSURL *urlToUpload = [[NSURL alloc]initFileURLWithPath:stringUrl];
NSString* sUrl = [NSString stringWithFormat:@"%@",urlToUpload];
NSString *protectedUrl = (__bridge NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,(__bridge CFStringRef)sUrl, NULL, (CFStringRef)@"!'\"();:@&=+$,/?%#[]% ",CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
NSLog(@"Protected URL:%@", protectedUrl);
NSString *imageUrl = [NSString stringWithFormat:@"\"%@\"", sUrl];
NSString *buttonUrl = [NSString stringWithFormat:@"\"http://pinterest.com/pin/create/button/?url=www.flor.com&media=%@&description=%@\"", protectedUrl, description];

NSMutableString *htmlString = [[NSMutableString alloc] initWithCapacity:1000];
[htmlString appendFormat:@"<html> <body>"];
[htmlString appendFormat:@"<p align=\"center\"><a href=%@ class=\"pin-it-button\" count-layout=\"horizontal\"><img border=\"0\" src=\"http://assets.pinterest.com/images/PinExt.png\" title=\"Pin It\" /></a></p>", buttonUrl];
[htmlString appendFormat:@"<p align=\"center\"><img width=\"400px\" height = \"400px\" src=%@></img></p>", imageUrl];
[htmlString appendFormat:@"<script type=\"text/javascript\" src=\"//assets.pinterest.com/js/pinit.js\"></script>"];
[htmlString appendFormat:@"</body> </html>"];
return htmlString;
}

For above code my screen shot result is link1link2 so please suggest any method to reslove this problem.Thanks

After posted images on server and assigned appropriate URL Address to pinit button, then it worked for me. I post my answers herefor those who will be most likely to post local images from app on pinterest.

Hope it will be helpful for all.

Thanks