如何在iphone上的whatsapp上共享图像+文本标题(URL)？

Question

我在WhatsApp上使用了以下代码来共享图像,但我无法使用以下代码设置标题文本.

我已尝试过注释属性UIDocumentInteractionController,但在WhatsApp开发人员表单中,没有为注释指定任何键.

我知道我们可以通过使用来实现UIImageGraphicContext,但我需要将URL作为标题共享

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];
}

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];