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;