IOS7判断程序是否可用相机

        

IOS7的方法，IOS6隐私中没有相机。

需要倒入库：

#import <AVFoundation/AVFoundation.h>

#import <AVFoundation/AVCaptureDevice.h>

AVCaptureDevice.h 里面有对硬件的操作的一些方法。闪光灯，相机等应用。

NSString *mediaType = AVMediaTypeVideo;// Or AVMediaTypeAudio

        AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];

        if(authStatus == AVAuthorizationStatusDenied){

              NSLog(@"Denied");

         }

        

判断该设备是否支持拍照：

    [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]

调用相机

       UIImagePickerController *picker = [[UIImagePickerController alloc] init];

        picker.navigationBar.barStyle = UIBarStyleBlack;

        picker.navigationBar.translucent = YES;

        picker.delegate = self;

        picker.sourceType = UIImagePickerControllerSourceTypeCamera;