// 相册权限枚举
typedef NS_ENUM(NSInteger, AlbumAuthorizationType) {
    AlbumAuthorizationTypeDefault, // 默认还没做出选择
    AlbumAuthorizationTypeClose, // 此应用程序没有被授权访问的照片数据
    AlbumAuthorizationTypeAllow // 用户已经授权应用访问照片数据
};

// 相机权限枚举
typedef NS_ENUM(NSInteger, CameraAuthorizationType) {
    CameraAuthorizationTypeDefault, // 默认还没做出选择
    CameraAuthorizationTypeClose, // 此应用程序没有被授权访问的照片数据
    CameraAuthorizationTypeAllow // 用户已经授权应用访问照片数据
};

#pragma mark 获取相册权限
+ (void)albumAuthorizationWithAuthorization:(void(^)(AlbumAuthorizationType authorization))authorization;

#pragma mark 获取相册权限
+ (void)cameraAuthorizationWithAuthorization:(void(^)(CameraAuthorizationType authorization))authorization;

#pragma mark 访问是否获取了相册权限
+ (void)albumAuthorizationWithAuthorization:(void(^)(AlbumAuthorizationType authorization))authorization {
    
    PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
    if (status == PHAuthorizationStatusRestricted ||
        status == PHAuthorizationStatusDenied) {
        
        authorization(AlbumAuthorizationTypeClose); // 关闭了权限
    } else if (status == PHAuthorizationStatusAuthorized) {
        
        authorization(AlbumAuthorizationTypeAllow); // 开了权限
    } else {
        
        // 如果是默认状态，就开始申请权限，并将申请到的权限返回
        [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
            
            if (status == PHAuthorizationStatusDenied) {
                authorization(AlbumAuthorizationTypeClose); // 关闭了权限
            } else if (status == PHAuthorizationStatusAuthorized) {
                authorization(AlbumAuthorizationTypeAllow); // 开了权限
            }
        }];
    }
}

#pragma mark 获取相机权限
+ (void)cameraAuthorizationWithAuthorization:(void(^)(CameraAuthorizationType authorization))authorization {
    
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (authStatus == AVAuthorizationStatusAuthorized) {

        authorization(CameraAuthorizationTypeAllow); // 权限已开启
    } else if (authStatus == AVAuthorizationStatusDenied) {

        authorization(CameraAuthorizationTypeClose); // 权限已关闭
    } else if (authStatus == AVAuthorizationStatusNotDetermined) {
        
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
            
            if (granted) {
                authorization(CameraAuthorizationTypeAllow); // 权限已开启
            } else {
                authorization(CameraAuthorizationTypeClose); // 权限已关闭
            }
        }];
    }
}