iOS条形码高效扫描仪

Question

I am working on an iOS application and I am interested to embed some already developed and tested barcode scanner into it. I tried zxing but this never extract the numbers out of it. My goal is to scan this image and get 24 characters out of it.

If there is not a already developed thing, I would like to build one myself. How should I start in order to create it from scratch for 1D barcodes initially?

Using zxing I am using this piece of code now.

- (IBAction)scanPressed:(id)sender {

    ZXingWidgetController *widController = [[ZXingWidgetController alloc] initWithDelegate:self showCancel:YES OneDMode:YES];

    zxing::oned::Code128Reader *code128Reader = new zxing::oned::Code128Reader();
    MultiFormatOneDReader *mfReader = [[MultiFormatOneDReader alloc] initWithReader:code128Reader];
    NSSet *readers = [[NSSet alloc ] initWithObjects:mfReader,nil];
    [mfReader release];

    widController.readers = readers;
    [readers release];

    NSBundle *mainBundle = [NSBundle mainBundle];
    widController.soundToPlay =
    [NSURL fileURLWithPath:[mainBundle pathForResource:@"beep-beep" ofType:@"aiff"] isDirectory:NO];
    [self presentModalViewController:widController animated:YES];
    [widController release];
}

Answer 1

I tried ZXing SDK first but it didn't work. I then tried ZBar SDK which worked just amazingly great.

If in future someone would need the same thing I am going to post the link which helped me make it work.

http://zbar.sourceforge.net/iphone/sdkdoc/tutorial.html

Answer 2

If this is a "Code 128" barcode, pay attention of the variant of the code.

For example if using zxing you successfully scanned the code but the decoded values do not match the numbers under the barcode, that's probably because zxing decoded the barcode bytes successfully but didn't render the result using the expected alphabet.

Code 128 exists in three variants:

• Code 128 A which uses the alphabet "!#$%&'()*+.-/0123456789:;<=>?@ ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_
• Code 128 A which uses the wider alphabet "!#$%&'()*+.-/0123456789:;<=>?@ ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`` abcdefghijklmnopqrstuvwxyz{|}~
• Code 128 C which encodes numbers 0-9

Maybe zxing returns the 128-A or 128-B interpretation of the barcode and not the 128-C variant? In such cases it would mean that the scanning works correctly but you may force the barcode format so it can interpret it right.

Answer 3

Maybe I'm wrong about this the zxing code bases for iphone only allows for QR codes. From the website site http://code.google.com/p/zxing/

There are also additional modules which are contributed and/or intermittently maintained:

 zxing.appspot.com: The source behind our web-based barcode generator csharp: Partial C# port cpp: Partial C++ port **iphone: iPhone client + port to Objective C / C++ (QR code only)** jruby: Ruby wrapper actionscript: partial port to Actionscript