//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 <CoreLocation/CoreLocation.h>
BOOL
magnetometerAvailbale = [CLLocationManager headingAvailable];
//检查声音支持 AVFoundation.framework <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
//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];
NSArray *sourceTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
//返回所支持的media的类型数组
[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
}