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我想创建一个自定义键盘,充当条形码扫描仪。 我已经完成了整个编码,但输出结果并不如预期:我被要求提供相机权限(第一次),但相机不向视图发送视频。iOS自定义键盘 - 相机不能正常工作
我想,使用键盘出于安全原因可能会有一些限制吗?!?
1)打开火炬
-(void) turnFlashOn
{
AVCaptureDevice *flashLight = [AVCaptureDevice
defaultDeviceWithMediaType:AVMediaTypeVideo];
if([flashLight isTorchAvailable] && [flashLight
isTorchModeSupported:AVCaptureTorchModeOn])
{
BOOL success = [flashLight lockForConfiguration:nil];
if(success){
NSError *error;
[flashLight setTorchMode:AVCaptureTorchModeOn];
[flashLight setTorchModeOnWithLevel:1.0 error:&error];
NSLog(@"Error: %@", error);
[flashLight unlockForConfiguration];
NSLog(@"flash turned on -> OK");
}
else
{
NSLog(@"flash turn on -> ERROR");
}
}
}
这给了我这个日志输出,但没有用闪光灯会发生:
Error: (null)
flash turned on -> OK
2)扫描条码(viewDidLoad中的一部分)
// SCANNER PART
self.captureSession = [[AVCaptureSession alloc] init];
AVCaptureDevice *videoCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *videoInput = [AVCaptureDeviceInput deviceInputWithDevice:videoCaptureDevice error:&error];
if(videoInput)
[self.captureSession addInput:videoInput];
else
NSLog(@"Error: %@", error);
AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];
[self.captureSession addOutput:metadataOutput];
[metadataOutput setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
[metadataOutput setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode, AVMetadataObjectTypeEAN13Code]];
AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession];
camView = [[UIView alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
previewLayer.frame = camView.layer.bounds;
[camView.layer addSublayer:previewLayer];
self.keyboard.barcodeView.clipsToBounds=YES;
camView.center = CGPointMake(self.keyboard.barcodeView.frame.size.width/2, self.keyboard.barcodeView.frame.size.height/2);
[self.keyboard.barcodeView addSubview:camView];
如果我按下键盘上的一个特殊键这一个被称为:
-(void)scanBarcodeNow{
AudioServicesPlaySystemSound(systemSoundTock);
NSLog(@"Start scanning...");
self.keyboard.barcodeView.hidden=false;
[self.keyboard.barcodeView addSubview:camView];
[self.keyboard.barcodeView setBackgroundColor:[UIColor redColor]];
[self.captureSession startRunning];
}
的唯一的事情发生,就是keyboard.barcodeView改变其背景颜色为红色。我已经明白了,我所做的所有布线应该都是好的。但没有显示摄像机的视频....
任何人都可以帮我吗?
您在创建此键盘方面有任何进展吗?我想创建相同的 – 2015-09-24 14:14:37