检查设备摄像头、指南针、录像、陀螺仪的状态代码,ObjC代码库,德仔网

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【ObjC】检查设备摄像头、指南针、录像、陀螺仪的状态

作者:Dezai.CN / 发布于2013/7/25/ 747


	//检查前后摄像头
	- (void)cameraBtnAction:(id)sender
	{
	 BOOL cameraAvailable = [UIImagePickerController isCameraDeviceAvailable:
	 UIImagePickerControllerCameraDeviceRear];//前
	 BOOL frontCameraAvailable = [UIImagePickerController isCameraDeviceAvailable:
	 UIImagePickerControllerCameraDeviceFront];//后
	}
	
	//检查指南针 CoreLocation.framework <CoreLocation/CoreLocation.h>
	- (void)magnetometerBtnAction:(id)sender
	{
	 BOOL magnetometerAvailbale = [CLLocationManager headingAvailable];
	}
	
	//检查声音支持 AVFoundation.framework <AVFoundation/AVFoundation.h>
	- (bool)audioBtnAction:(id)sender
	{
	 //返回一个AVAudioSession实例
	 AVAudioSession *audioSession = [AVAudioSession sharedInstance];
	 BOOL audioAvailable = audioSession.inputAvailable;//bool值。获取是否支持
	}
	
	//检查录像支持 MobileCoreServices.framework <MobileCoreServices/MobileCoreServices.h>
	- (BOOL)isvideoCameraAvailable
	{
	 //简单检查所有的可用的媒体资源类型，然后检查返回的数组，
	 //如果其中包含了kUTTypeMovie的NSString类型对象，就证明摄像头支持录像
	 UIImagePickerController *picker = [[UIImagePickerController alloc]init];
	 //返回所支持的media的类型数组
	 NSArray *sourceTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
	 [picker release];
	 if (![sourceTypes containsObject:(NSString *)kUTTypeMovie]) {//containsObject确定数组中是否包含后面的对象
	 return NO;
	 }
	 return YES;
	}
	
	//检查陀螺仪可用 CoreMotion.framework <CoreMotion/CoreMotion.h>
	- (BOOL) isGyroscopeAvailable
	{
	#ifdef __IPHONE_4_0//4.0之后才有
	 CMMotionManager *motionManager = [[CMMotionManager alloc]init];
	 BOOL gyroscopeAvailable = motionManager.gyroAvailable;
	 [motionManager release];
	 return gyroscopeAvailable;
	#else
	 return NO;
	#endif
	}

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　陀螺仪　

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