Thanks

Modify from https://github.com/yannickl/QRCodeReaderViewController

screenshot

Install

CocoaPods

If you're using CocoaPods (You are not?! You should!!) just add

pod 'QRCodeReaderViewController', :git => 'https://github.com/zhengjinghua-ext-forks/QRCodeReaderViewController.git'

into your Podfile file.

Manually

Download the project and copy the QRCodeReaderViewController folder into your project and then simply #import "QRCodeReaderViewController.h" in the file(s) you would like to use it in.

Usage

- (IBAction)scanAction:(id)sender
{
  NSArray *types = @[AVMetadataObjectTypeQRCode];
  _reader        = [QRCodeReaderViewController readerWithMetadataObjectTypes:types];
  
  // Using delegate methods
  _reader.delegate = self;
  
  // Or by using blocks
  [_reader setCompletionWithBlock:^(NSString *resultAsString) {
    [self dismissViewControllerAnimated:YES completion:^{
      NSLog(@"%@", resultAsString);
    }];
  }];
  
  [self presentViewController:_reader animated:YES completion:NULL];
}

#pragma mark - QRCodeReader Delegate Methods

- (void)reader:(QRCodeReaderViewController *)reader didScanResult:(NSString *)result
{
  [self dismissViewControllerAnimated:YES completion:^{
    NSLog(@"%@", result);
  }];
}

- (void)readerDidCancel:(QRCodeReaderViewController *)reader
{
  [self dismissViewControllerAnimated:YES completion:NULL];
}

Note that you should check whether the device supports the reader library by using the [QRCodeReader isAvailable] or the [QRCodeReader supportsMetadataObjectTypes:nil] methods.