闪光灯控制

Flash和Torch，闪光灯和火炬是不一样的，as they use the same lamp.

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AVCaptureDevice.h主要用来获取iphone一些关于相机设备的属性。

前置和后置摄像头

enum {

AVCaptureDevicePositionBack                = 1,

AVCaptureDevicePositionFront               = 2

};

typedef NSInteger AVCaptureDevicePosition;

 

闪光灯开关

 

enum {

AVCaptureFlashModeOff  = 0,

AVCaptureFlashModeOn   = 1,

AVCaptureFlashModeAuto = 2

};

typedef NSInteger AVCaptureFlashMode;

手电筒开关

 

enum {

AVCaptureTorchModeOff  = 0,

AVCaptureTorchModeOn   = 1,

AVCaptureTorchModeAuto = 2,

};

typedef NSInteger AVCaptureTorchMode;

 

焦距调整

 

enum {

AVCaptureFocusModeLocked              = 0,

AVCaptureFocusModeAutoFocus           = 1,

AVCaptureFocusModeContinuousAutoFocus = 2,

};

typedef NSInteger AVCaptureFocusMode;

 

曝光量调节

 

enum {

AVCaptureExposureModeLocked = 0,

AVCaptureExposureModeAutoExpose = 1,

AVCaptureExposureModeContinuousAutoExposure = 2,

};

typedef NSInteger AVCaptureExposureMode;

 

白平衡

 

enum {

AVCaptureWhiteBalanceModeLocked         = 0,

AVCaptureWhiteBalanceModeAutoWhiteBalance         = 1,

    AVCaptureWhiteBalanceModeContinuousAutoWhiteBalance = 2,

};

typedef NSInteger AVCaptureWhiteBalanceMode;