ios - 应用程序不要求 iOS 6 上的联系人访问权限

Question

我正在使用下面的代码，我的应用程序在 iOS 6 上不请求权限，而在 iOS 7 及更高版本上它请求联系人权限访问。在 iOS 6 上，它也不会在隐私设置中显示应用程序。我已经阅读了其他一些线程，但没有找到任何解决方案。

App crashed in iOS 6 when user changes Contacts access permissions

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.0")) {

    __block CDNDeviceContact *controller = self;

    // Request authorization to Address Book
    ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, NULL);

    if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {

        ABAddressBookRequestAccessWithCompletion(addressBookRef,
                                                 ^(bool granted, CFErrorRef error) {
                                                     if (granted)
                                                         [controller loadContacts];
                                                     else [controller doAlertForContact];
                                                 });
    } else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized) {

        // The user has previously given access, add the contact
        [self loadContacts];
    } else {
        [controller doAlertForContact];
    }
    if (addressBookRef)  CFRelease(addressBookRef);
}

Answer 1

如果用户之前已收到获得许可的请求，则不会再次显示。根据documentation ,

The user is only asked for permission the first time you request access. Later calls use the permission granted by the user.

如果在模拟器中测试，我建议您转到 iOS 模拟器 -> 重置内容和设置，以便您能够模拟事件。