这里有一些代码让你开始：

//First of all import the AddRessBookUI 
  #import <AddressBookUI/AddressBookUI.h>

  // Request to authorise the app to use addressbook
  ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(nil,nil);

  if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {
    ABAddressBookRequestAccessWithCompletion(addressBookRef,^(bool granted,CFErrorRef error) {
      if (granted) {
          // If the app is authorized to access the first time then add the contact
          [self _addContactToAddressBook];
      } else {
          // Show an alert here if user denies access telling that the contact cannot be added because you didn't allow it to access the contacts
      }
    });
  }
  else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized) {
    // If the user user has earlier provided the access,then add the contact
    [self _addContactToAddressBook];
  }
  else {
    // If the user user has NOT earlier provided the access,create an alert to tell the user to go to Settings app and allow access
  }

这里有另外几个教程,您可能希望看到可以找到HERE和HERE.

希望这可以帮助！

更新：您必须使用didFinishLaunchingWithOptions检测您的应用程序第一次启动：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"])
    {
        // The app has already launched once
    }
    else
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        // This is the first time the app is launched
    }
}