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

问题

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 UIDocumentInteractionController,But in WhatsApp developer form there is not any key is specified for annotation.

I do know that we can do it by using UIImageGraphicContext, But I need to share URL as caption

if ([[UIApplication sharedApplication] canOpenURL: [NSURL URLWithString:@"whatsapp://app"]])
{
    NSString * savePath  = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/whatsAppTmp.wai"];

    [UIImageJPEGRepresentation([UIImage imageNamed:@"Convenor- image-SURANA1.png"], 1.0) writeToFile:savePath atomically:YES];

    _documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:savePath]];
    _documentInteractionController.annotation = [NSDictionary dictionaryWithObject:@"wwww.google.com" forKey:@"whatsappCaption"];

    _documentInteractionController.UTI = @"net.whatsapp.image";
    _documentInteractionController.delegate = self;

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

} else {
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert." message:@"Por favor, instale Whatsapp." delegate:nil cancelButtonTitle:@"Está bem" otherButtonTitles:nil];
    [alert show];
}

回答1:

You cannot pre-fill caption while sharing image on whatsapp. Facebook has already deprecated this functionality from Facebook, Instagram also.

You can either send a text or an image. But programmatically pre-filling caption is not possible.

The code in the question is fine to send an image. In order to send a plain text you can use the reference of below mentioned link:

http://www.whatsapp.com/faq/en/iphone/23559013

NOTE: Setting caption programmatically is not possible.

Hope this helps!

回答2:

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];

来源：https://stackoverflow.com/questions/27089069/how-can-i-share-image-text-captionurl-on-whatsapp-from-iphone

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ios

iphone