iphone - 如何通过ZBarSDK从二维码中获取URL并直接呈现在UIWebView中

Question

我需要在我的应用程序中嵌入二维码阅读器。到目前为止，ZBarSDK 似乎是一个很好的 ios 解决方案。我抓取了一些示例和教程，并成功地将功能嵌入到我的应用程序中。

但是，对于我找到的教程，都只是显示带有警报的结果。

在我的例子中，我将要使用的二维码将包含一个 url，我需要的是在扫描后直接呈现网页。 Web 需要在包含导航栏的 UIweb 浏览器中打开，以便用户可以轻松返回应用程序。我是应用程序开发的初学者。如果有人能为我提供一些解决方案，我将不胜感激。到目前为止，这是我的代码

- (IBAction)scanButtonPress:(id)sender
{
    ZBarReaderViewController *reader = [ZBarReaderViewController new];
    reader.readerDelegate = self;

    [reader.scanner setSymbology:ZBAR_UPCA config:ZBAR_CFG_ENABLE to:0];
    reader.readerView.zoom = 1.0;

    [self presentModalViewController:reader
                            animated:YES];
}

- (void)    imagePickerController:(UIImagePickerController *)reader didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    id <NSFastEnumeration> results = [info objectForKey:ZBarReaderControllerResults];

    ZBarSymbol *symbol = nil;

    for (symbol in results)
    {
        NSString *upcString = symbol.data;

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Scanned UPC" message:[NSString stringWithFormat:@"The UPC read was: %@", upcString] delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];

        [alert show];

        [reader dismissModalViewControllerAnimated:YES];
    }
}

我知道代码应该在那里更改

 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Scanned UPC" message:[NSString stringWithFormat:@"The UPC read was: %@", upcString] delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];

    [alert show];

但我不知道实现此功能的正确代码是什么。

Answer 1

希望这段代码对您有所帮助:

- (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
{

  <NSFastEnumeration> results =
        [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        // EXAMPLE: just grab the first barcode
        break;

    // EXAMPLE: do something useful with the barcode data
    NSString *resultText = symbol.data;

    // ADD: dismiss the controller (NB dismiss from the *reader*!)
    [reader dismissModalViewControllerAnimated: YES];


    BOOL canOpenGivenURL = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:resultText]];

    if (canOpenGivenURL)
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:resultText]];
    else
        // Not valid URL -- show some alert 
}