AVCaptureDevice.h,主要用来获取iphone一些关于相机设备的属性。
AVCaptureDevice.h,必须要引入AVFoundation.framework包。
1. 前置和后置摄像头
enum {
AVCaptureDevicePositionBack = ,
AVCaptureDevicePositionFront =
};
typedef NSInteger AVCaptureDevicePosition;
2. 闪光灯开关
enum {
AVCaptureFlashModeOff = ,
AVCaptureFlashModeOn = ,
AVCaptureFlashModeAuto =
};
typedef NSInteger AVCaptureFlashMode;
3. 手电筒开关
enum {
AVCaptureTorchModelOff = ,
AVCaptureTorchModelOn = ,
AVCaptureTorchModeAuto =
};
typedef NSInteger AVCaptureTorchMode;
4. 焦距调整
enum {
AVCaptureFocusModelLocked = ,
AVCaptureFocusModeAutoFocus = ,
AVCaptureFocusModeContinousAutoFocus =
};
typedef NSInteger AVCaptureFocusMode;
5. 曝光量调节
enum {
AVCaptureExposureModeLocked = ,
AVCaptureExposureModeAutoExpose = ,
AVCaptureExposureModeContinuousAutoExposure =
};
typedef NSInteger AVCaptureExposureMode;
6. 白平衡
enum {
AVCaptureWhiteBalanceModeLocked = ,
AVCaptureWhiteBalanceModeAutoWhiteBalance = ,
AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance =
};
typedef NSInteger AVCaptureWhiteBalanceMode;
开启闪光灯
AVCaptureDevice* d = nil; // find a device by position
NSArray* allDevices = [AVCaptureDevice devices];
for (AVCaptureDevice* currentDevice in allDevices)
{
if (currentDevice.position == AVCaptureDevicePositionBack)
{
d = currentDevice;
}
} // at this point, d may still be nil, assuming we found something we like....
NSError* err = nil;
BOOL lockAcquired = [d lockForConfiguration:&err];
if (!lockAcquired) {
// log err and handle...
} else {
// flip on the flash mode
if ([d hasFlash] && [d isFlashModeSupported:AVCaptureFlashModeOn] )
{
[d setFlashMode:AVCaptureFlashModeOn];
} [d unlockForConfiguration];
}