AVCaptureDevice属性

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。

• 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 {    AVCaptureTorchModelOff = 0,    AVCaptureTorchModelOn = 1,    AVCaptureTorchModeAuto = 2};typedef NSInteger AVCaptureTorchMode;

• 焦距调整

enum {    AVCaptureFocusModelLocked = 0,    AVCaptureFocusModeAutoFocus = 1,    AVCaptureFocusModeContinousAutoFocus = 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;