Set Timeout about tesseract-ocr-ios HOT 2 CLOSED

#define kScanTimeInterval 0.5f
//...
- (void)createScanner
{
    self.scanner = nil;
    self.scanner = [[Tesseract alloc] initWithLanguage:@"swe"];
    [self.scanner setVariableValue:@"0123456789# ->,AaBbCcDdEeFfGgIiJjKkLlMmNnOoPpRrSsTtUuVv" forKey:@"tessedit_char_whitelist"];
//    [self.scanner setVariableValue:@"±@$%^§&*+=[]{}'|?~" forKey:@"tessedit_char_blacklist"];
    self.scanner.delegate = self;
    self.grayScaleFilter = [[GPUImageGrayscaleFilter alloc] init];
}

- (void)prepareToScan
{
    self.timer = [[MSWeakTimer alloc] initWithTimeInterval:kScanTimeInterval
                                                    target:self
                                                  selector:@selector(timerTicked)
                                                  userInfo:nil
                                                   repeats:YES
                                             dispatchQueue:dispatch_get_main_queue()];
    [self.timer schedule];    
    [self.captureSession startRunning];
}

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection;
{
    if (canScanFrame) {
        canScanFrame = NO;
        UIImage *image = [self imageFromSampleBuffer:sampleBuffer];
        image = [UIImage imageByCropping:image toRect:self.rectForScanning];        
        image = [self.grayScaleFilter imageByFilteringImage:image];

        [self.scanner setImage:image];
        isScanning = YES;

        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            NSLog(@"scan start");
            [self.scanner recognize];
            NSLog(@"scan stop");
            dispatch_async(dispatch_get_main_queue(), ^{
                isScanning = NO;
                NSString *text = [self.scanner recognizedText];
                if (self.delegate && [self.delegate respondsToSelector:@selector(ocrScanner:didScanWithResult:forImage:)]) {
                        [self.delegate ocrScanner:self didScanWithResult:text forImage:image];
                }
            });
        });
    }
}

- (void)timerTicked
{
    if (!isScanning) {
        canScanFrame = YES;
    }
}