iOS检测设备摄像头、指南针、录音、陀螺仪状态

た入场券 2022-07-12 12:28 271阅读 0赞

- (void)viewDidLoad {
        [super viewDidLoad];
        
        //检查前后摄像头
        BOOL cameraAvailable = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];//前
        BOOL frontCameraAvailable = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront];//后
        
        //检查指南针 CoreLocation.framework  #import <CoreLocation/CoreLocation.h>
        BOOL magnetometerAvailbale = [CLLocationManager headingAvailable];
        
        //检查声音支持 AVFoundation.framework #import <AVFoundation/AVFoundation.h>
        AVAudioSession *audioSession = [AVAudioSession sharedInstance];  //返回一个AVAudioSession实例
        BOOL audioAvailable = audioSession.inputAvailable;//bool值。获取是否支持
        
        NSLog(@"--%d--%d--%d--%d--",cameraAvailable,frontCameraAvailable,magnetometerAvailbale,audioAvailable);
    }

//检查录像支持 MobileCoreServices.framework #import <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];
        NSArray *sourceTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];//返回所支持的media的类型数组
        
        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 #import <CoreMotion/CoreMotion.h>
    - (BOOL) isGyroscopeAvailable{
    #ifdef __IPHONE_4_0//4.0之后才有
        CMMotionManager *motionManager = [[CMMotionManager alloc]init];
        BOOL gyroscopeAvailable = motionManager.gyroAvailable;
        return gyroscopeAvailable;
    #else
        return NO;
    #endif
    }

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