जेडबार एसडीके और कैमरा आईओएस 8

Question

में ठीक से काम नहीं कर रहा है। मेरे पास ऐप ZBar के साथ एकीकृत है। यह आईओएस 7.1 और नीचे पूरी तरह से काम कर रहा है, लेकिन आईओएस 8.0 डिवाइस में मुझे लगता है कि कैमरा दृश्य सबसे पहले काले रंग में दिखाया गया है। हालांकि, अगर मैं पृष्ठभूमि स्थिति में ऐप भेजता हूं और मैं इसे फिर से अग्रभूमि भेजता हूं, कैमरा दृश्य खुला रहता है, तो यह काम करता है। क्या किसी ने इसका अनुभव किया है?

धन्यवाद

Answer 1

आप केवल QR कोड को स्कैन की जरूरत है, यह देशी साधन के साथ ऐसा करना बहुत आसान है:

अपने कुलपति की ज में जोड़ें:

#import <AVFoundation/AVFoundation.h> 
@interface FEQRViewController : UIViewController <AVCaptureMetadataOutputObjectsDelegate> 

और में। मीटर

@interface FEQRViewController() 

@property (nonatomic) BOOL isReading; 

@property (nonatomic, strong) AVCaptureSession *captureSession; 
@property (nonatomic, strong) AVCaptureVideoPreviewLayer *videoPreviewLayer; 

-(BOOL)startReading; 

-(void)stopReading; 

@end 

@implementation FEQRViewController 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    self.view.backgroundColor = ....; 


    self.isReading = NO; 
    self.captureSession = nil; 


    // Do any additional setup after loading the view from its nib. 
} 

-(void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated]; 
    if (!self.isReading) { 
     if ([self startReading]) { 
      //[self.startButton setTitle:@"Stop" forState:UIControlStateNormal]; 
      [self.statusLabel setText:@"Scanning for QR Code..." ]; 
     } 
    } 
    else{ 
     [self stopReading]; 
     [self.startButton setTitle:@"Start!" forState:UIControlStateNormal]; 
    } 

} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 


-(BOOL)startReading 
{ 
    NSError *error; 
    AVCaptureDevice *captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 

    AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error]; 

    if (!input) { 
     NSLog(@"%@", [error localizedDescription]); 
     return NO; 
    } 

    self.captureSession = [[AVCaptureSession alloc] init]; 
    [self.captureSession addInput:input]; 

    AVCaptureMetadataOutput *captureMetadataOutput = [[AVCaptureMetadataOutput alloc] init]; 
    [self.captureSession addOutput:captureMetadataOutput]; 

    dispatch_queue_t dispatchQueue; 
    dispatchQueue = dispatch_queue_create("myQueue", NULL); 
    [captureMetadataOutput setMetadataObjectsDelegate:self queue:dispatchQueue]; 
    [captureMetadataOutput setMetadataObjectTypes:[NSArray arrayWithObject:AVMetadataObjectTypeQRCode]]; 

    self.videoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession]; 
    [self.videoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill]; 
    [self.videoPreviewLayer setFrame:self.preview.layer.bounds]; 
    [self.preview.layer addSublayer:_videoPreviewLayer]; 

    [_captureSession startRunning]; 
    return YES; 
} 

-(void)stopReading 
{ 
    [self.captureSession stopRunning]; 

    self.captureSession = nil; 
    [self.videoPreviewLayer removeFromSuperlayer]; 

} 


-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection{ 
    if (metadataObjects != nil && [metadataObjects count] > 0) { 

     AVMetadataMachineReadableCodeObject *metadataObj = [metadataObjects objectAtIndex:0]; 
     if ([[metadataObj type] isEqualToString:AVMetadataObjectTypeQRCode]) { 
      [self.statusLabel performSelectorOnMainThread:@selector(setText:) withObject:[metadataObj stringValue] waitUntilDone:NO]; 
      NSURL *url = [NSURL URLWithString:[metadataObj stringValue]]; 
      if (url) 

       [self performSelectorOnMainThread:@selector(goToURL:) withObject:url waitUntilDone:NO]; 

      [self performSelectorOnMainThread:@selector(stopReading) withObject:nil waitUntilDone:NO]; 
      //[self.startButton performSelectorOnMainThread:@selector(setTitle:) withObject:@"Start!" waitUntilDone:NO]; 
      _isReading = NO; 
     } 
    } 
} 

-(void)goToURL:(NSURL *)url 
{ 
    //Handle URL... 
} 

- (IBAction)startButton:(id)sender { 

    if (!self.isReading) { 
     if ([self startReading]) { 
      [self.startButton setTitle:@"Stop" forState:UIControlStateNormal]; 
      [self.statusLabel setText:@"Scanning for QR Code..." ]; 
     } 
    } 
    else{ 
     [self stopReading]; 
     [self.startButton setTitle:@"Start!" forState:UIControlStateNormal]; 
    } 

    _isReading = !_isReading; 
} 

@end 

Answer 2

यह iOS 8

साथ मेरे लिए काम करता

ZBarReaderViewController *reader = [ZBarReaderViewController new]; 
reader.readerDelegate = self; 
reader.supportedOrientationsMask = ZBarOrientationMaskAll; 
[self presentViewController:reader animated:YES completion:nil]; 
[reader viewWillAppear:NO];`