AVCaptureDevice.h

AVCaptureDevice.h

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; 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]; } from：http://stackoverflow.com/a/3204078

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