iOS开发中对于摄像头的一些基本使用方法分享

}

 

- (void) swapFrontAndBackCameras {
//check for available cameras!
if (![self hasMultipleCameras]) return;

//assumes session is running
NSArray *inputs = self.captureSession.inputs; //should only be one value!
for ( AVCaptureDeviceInput *captureDeviceInput in inputs ) {
AVCaptureDevice *device = captureDeviceInput.device ;
if ( [device hasMediaType:AVMediaTypeVideo ] ) {
AVCaptureDevicePosition position = device.position ;
AVCaptureDevice *newCamera = nil ;
AVCaptureDeviceInput *newInput = nil ;

if (position == AVCaptureDevicePositionFront)
newCamera = [self cameraWithPosition:AVCaptureDevicePositionBack];
else
newCamera = [self cameraWithPosition:AVCaptureDevicePositionFront];

[self initializeCaptureDevice:newCamera];
newInput = [AVCaptureDeviceInput deviceInputWithDevice:newCamera error:nil];

// beginConfiguration ensures that pending changes are not applied immediately
[self.captureSession beginConfiguration ];

[self.captureSession removeInput:captureDeviceInput]; //remove current
[self.captureSession addInput:newInput]; //add new

// Changes take effect once the outermost commitConfiguration is invoked.
[self.captureSession commitConfiguration];
break ;
}
}
}

 

上面的代码是使用前置摄像头和后置摄像头！  
注：相关教程知识阅读请移步到IOS开发频道。