Zbar SDK and ios7/xcode 5 - App is reaching 100% cpu use and memory more than 100MB

Question

We are using Zbar bar code reader from last 2 years. With iOS 7 and Xcode 5, after scanning 5 bar codes the app is reaching 100 % cpu use for iOS 7 device(I can see that in

Answer 1

After seeing the same issue,

I moved from

ZBarReaderViewController

to

ZBarReaderView

The disappointing part of this, though, is if you are using features like Overlay in the ZBarReaderViewController, you have to recode how that all works and you have to implement things like starting and stopping the scanner, manually.

But essentially, you need something like this in your IBAction:

ZBarReaderView *reader = [ZBarReaderView new];
[self.view addSubview:reader];

reader.readerDelegate = self;
reader.tracksSymbols=YES;

ZBarImageScanner *scanner = reader.scanner;

reader.tag = 99999999;

// the important part here is to START the scanning

[reader start];

Also, remember to change your delegate in your header to ZBarReaderViewDelegate

Also, the delegate "method" that gets called, at least in my code, is now (versus the imagePickerController)

-(void) readerView: (ZBarReaderView*) view
        didReadSymbols: (ZBarSymbolSet*) syms
        fromImage: (UIImage*) img
            {

            for(ZBarSymbol *sym in syms) {

            [view stop];

            [self closeCameraScanner];

    // I am also setting reader to NIL but I don't really know if this is necessary or not.

            reader=nil;
        }


    }


    -(void)closeCameraScanner{

        UIView * v = [self.view viewWithTag:99999999];
        if (nil != v) {
            [v removeFromSuperview];
        }

        [self.view endEditing:YES];

    }

So, that's a quick and dirty way to do this. I have some additional code for manually creating the overlay and for limiting the scan crop but as far as simply getting it running, this did the trick for me.