iOS闪光灯操作

使用闪光灯需要引入AVFoundation框架，使用的类是AVCaptureSession , AVCaptureDevice , AVCaptureDeviceInput，然后在通过设置硬件属性，打开或关闭手电筒或flash就可以实现闪光灯效果，有demo，demo注释很清楚，肯定能让你初步明白怎么打开手电筒，demo链接http://download.csdn.net/download/lcg0412/6832689

一些设置属性：

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;

//提醒- (void)alertView:(NSString *)text{    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:text message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];    [alertView show];    [alertView performSelector:@selector(dismissWithClickedButtonIndex:animated:) withObject:@[@0, @YES] afterDelay:1];}//定时器，打开或关闭手电筒- (void)timerAction{    if(self.captureDevice.torchMode == AVCaptureTorchModeOn){        [self openTorch:AVCaptureTorchModeOff];    }    else{        [self openTorch:AVCaptureTorchModeOn];    }}//打开或关闭手电筒- (void)openTorch:(AVCaptureTorchMode)mode{    if(self.captureDevice.torchMode != mode){        //配置会话层        [self.captureSession beginConfiguration];        //对设备进行锁定操作        [self.captureDevice lockForConfiguration:NULL];        //打开手电筒        [self.captureDevice setTorchMode:mode];        //解锁        [self.captureDevice unlockForConfiguration];        //确认配置        [self.captureSession commitConfiguration];    }}//闪光灯效果- (IBAction)flashAction:(UISwitch *)sender {    if(![self.captureDevice hasTorch]){        [self alertView:@"亲，模拟器上没有手电筒哦。"];        return;    }    if(sender.on){        self.torchButton.enabled = NO;        if(self.timer == nil){            self.timer = [NSTimer scheduledTimerWithTimeInterval:.5 target:self selector:@selector(timerAction) userInfo:nil repeats:YES];        }        [self.timer fire];    }    else{        self.torchButton.enabled = YES;        [self.timer invalidate];        self.timer = nil;    }}//手电筒效果- (IBAction)torchOpen:(UISwitch *)sender {    if(![self.captureDevice hasTorch]){        [self alertView:@"亲，模拟器上没有手电筒哦。"];        return;    }    if(sender.on){        self.flashButton.enabled = NO;        [self openTorch:AVCaptureTorchModeOn];    }    else{        self.flashButton.enabled = YES;        [self openTorch:AVCaptureTorchModeOff];    }}- (AVCaptureDevice *)captureDevice{    if(_captureDevice == nil){        _captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];    }    return _captureDevice;}- (AVCaptureDeviceInput *)captureDeviceInput{    if(_captureDeviceInput == nil){        _captureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self captureDevice] error:NULL];    }    return _captureDeviceInput;}- (AVCaptureSession *)captureSession{    if(_captureSession == nil){        _captureSession = [[AVCaptureSession alloc] init];        [_captureSession addInput:[self captureDeviceInput]];    }    return _captureSession;}

                                             
        0        0           
	
				
	
					   
IOS-闪光灯操作
	  	   
IOS-闪光灯操作
	  	   
iOS闪光灯操作
	  	   
IOS-闪光灯操作
	  	   
IOS打开系统闪光灯操作
	  	   
iOS 闪光灯
	  	   
ios闪光灯
	  	   
android闪光灯操作代码
	  	   
IOS 调用iphone闪光灯
	  	   
ios调用闪光灯
	  	   
ios闪光灯调用
	  	   
iOS 调用闪光灯
	  	   
iOS打开闪光灯
	  	   
iOS自动打开闪光灯
	  	   
iOS 关闭和开启闪光灯
	  	   
iOS 打开、关闭闪光灯
	  	   
闪光灯
	  	   
闪光灯
	     		  
	  	   
ubuntu下的root随机密码问题
	  	   
Linux下几种文件传输命令
	  	   
行人检测(Pedestrian Detection)资源
	  	   
d7下   TDrawingStyle  TImageType  DecimalSeparator
	  	   
经典的机器学习方面源代码库
	  	   
iOS闪光灯操作
	  	   
程序设计代码 贴着玩。。七
	  	   
合并exe  dll
	  	   
xStream完美转换XML、JSON
	  	   
【转载】图解linux下top命令的使用
	  	   
[Effective C++]  函数名覆盖
	  	   
深入剖析阿里巴巴云梯YARN集群
	  	   
java笔记3
	  	   
java经典算法排序