iOS  判断应用是否有使用相机的权限

 NSString *mediaType =AVMediaTypeVideo;

        AVAuthorizationStatus authStatus = [AVCaptureDeviceauthorizationStatusForMediaType:mediaType];

        if(authStatus ==ALAuthorizationStatusRestricted || authStatus ==ALAuthorizationStatusDenied){

NSLog(@"相机权限受限");

            return;

        }

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全部状态

typedef NS_ENUM(NSInteger, ALAuthorizationStatus) {

    ALAuthorizationStatusNotDetermined = 0,// User has not yet made a choice with regards to this application

    ALAuthorizationStatusRestricted,        // This application is not authorized to access photo data.

                                            // The user cannot change this application’s status, possibly due to active restrictions

                                            //  such as parental controls being in place.

    ALAuthorizationStatusDenied,            // User has explicitly denied this application access to photos data.

    ALAuthorizationStatusAuthorized         // User has authorized this application to access photos data.

} __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_6_0);

注意：要添加 AVFoundation 库。

iOS 判断应用是否有使用相机的权限