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fix auto focus on ios 7 #129

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fix auto focus on ios 7 #129

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22 changes: 21 additions & 1 deletion src/ios/CDVBarcodeScanner.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -295,7 +295,27 @@ - (void)barcodeScanCancelled {
[self barcodeScanDone];
[self.plugin returnSuccess:@"" format:@"" cancelled:TRUE callback:self.callback];
}
//--------------------------------------------------------------------------
- (void) autoFocus{
NSError* error = nil;
NSArray *devices = [AVCaptureDevice devices];

for (AVCaptureDevice *device in devices) {
if ([device position] == AVCaptureDevicePositionBack) {
[device lockForConfiguration:&error];
if ([device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus])
{
CGPoint autofocusPoint = CGPointMake(0.5f, 0.5f);
[device setFocusPointOfInterest:autofocusPoint];
[device setFocusMode:AVCaptureFocusModeContinuousAutoFocus];
}

[device unlockForConfiguration];
}
}

[NSThread sleepForTimeInterval:1.0f];
}
//--------------------------------------------------------------------------
- (NSString*)setUpCaptureSession {
NSError* error = nil;
Expand Down Expand Up @@ -388,7 +408,7 @@ - (void)captureOutput:(AVCaptureOutput*)captureOutput didOutputSampleBuffer:(CMS
uint8_t* imageBytes;

// NSTimeInterval timeStart = [NSDate timeIntervalSinceReferenceDate];

[self autoFocus];
try {
DecodeHints decodeHints;
decodeHints.addFormat(BarcodeFormat_QR_CODE);
Expand Down