User permission before accessing iPhone data [duplicate]

问题

This question already has answers here:

Closed 6 years ago.

Possible Duplicate:
Ask permission to access Camera Roll

I am creating a app compatible with iOS5 in xcode 4.3.2. When i access photos, It is not showing permission alert also when i am running this app in iOS 6.0 devices. Can any one help me how to show permission alert for iOS6 devices. Thanks in advance.

回答1:

you can show this by help of ALAssetsLibrary library & ALAuthorizationStatus

ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus];

    if (status != ALAuthorizationStatusAuthorized) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Message" message:@"permission alert message" delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil, nil];
        [alert show];
    }

来源：https://stackoverflow.com/questions/14394886/user-permission-before-accessing-iphone-data