IOS 调用iphone闪光灯

最新推荐文章于 2021-11-24 21:19:57 发布

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#调用iphone闪光灯

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本文介绍如何使用AVFoundation库在iOS应用中控制摄像头的手电筒功能。通过创建AVCaptureSession并配置摄像头设备来实现手电筒的开关操作。

添加:AVFoundation库

#import <AVFoundation/AVFoundation.h>

.h

@interface xxxxx : UIViewController {
AVCaptureSession *AVSession;
}
@property(nonatomic,retain) AVCaptureSession *AVSession;

.m
@synthesize AVSession;
.......
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

if (device.torchMode == AVCaptureTorchModeOff)
{
// Create an AV session
AVCaptureSession *session = [[AVCaptureSession alloc] init];

// Create device input and add to current session
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error: nil];
[session addInput:input];

// Create video output and add to current session
AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
[session addOutput:output];

// Start session configuration
[session beginConfiguration];
[device lockForConfiguration:nil];

// Set torch to on
[device setTorchMode:AVCaptureTorchModeOn];

[device unlockForConfiguration];
[session commitConfiguration];

// Start the session
[session startRunning];

// Keep the session around
[self setAVSession:AVSession];

[output release];
}
else
{
[AVSession stopRunning]; //AVSession是定义在头文件的 (属性)
[AVSession release], AVSession = nil;
}