检测摄像头、指南针、陀螺仪的状态代码,ObjC代码库,德仔网

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【ObjC】检测摄像头、指南针、陀螺仪的状态

作者:chongq / 发布于2014/2/7/ 1157

检测摄像头、指南针、陀螺仪的状态

//检查前后摄像头

- (void)cameraBtnAction:(id)sender

{

BOOLcameraAvailable = [UIImagePickerController isCameraDeviceAvailable:

UIImagePickerControllerCameraDeviceRear];//前

BOOLfrontCameraAvailable = [UIImagePickerController isCameraDeviceAvailable:

UIImagePickerControllerCameraDeviceFront];//后

}



//检查指南针 CoreLocation.framework <CoreLocation/CoreLocation.h>

- (void)magnetometerBtnAction:(id)sender

{

BOOLmagnetometerAvailbale = [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];

BOOLaudioAvailable = 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

returnNO;

}

returnYES;

}



//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];

BOOLgyroscopeAvailable = motionManager.gyroAvailable;

[motionManager release];

returngyroscopeAvailable;

#else

returnNO;

#endif

}

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　检测摄像头　

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