How Can I share image +text caption(URL) on whatsapp from iphone?

Question

I have used following code for share image on WhatsApp but I am unable to set the caption text using following code.

I have tried annotation property of UIDocument

Answer 1

NSError *error       = nil;
NSURL   *documentURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:&error];

UIImage *image     = [UIImage imageNamed:@"share.png"];
NSURL   *tempFile  = [documentURL URLByAppendingPathComponent:@"whatsAppTmp.wai"];
NSData  *imageData = UIImageJPEGRepresentation(image, 1.0);

NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

NSLog(@"%@",docDir);
NSLog(@"saving png");

NSString *pngFilePath = [NSString stringWithFormat:@"%@/test.png",docDir];
NSData *data1 = [NSData dataWithData:UIImageJPEGRepresentation(image,1.0)];
[data1 writeToFile:pngFilePath atomically:YES];
_documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:pngFilePath]];
_documentInteractionController.delegate = self;
_documentInteractionController.UTI = @"net.whatsapp.image";

[_documentInteractionController presentOpenInMenuFromRect:CGRectMake(0, 0, 0, 0) inView:self.view animated: YES];