如何解决 - 谷歌+身份验证中的[__ NSCFString gtm_stringByUnescapingFromURLArgument]

Question

我正在尝试创建一个应用程序,从他的谷歌+帐户中检索当前用户的电子邮件ID,用户ID,用户名.代码的一部分如下,

- (IBAction)googleSigninBtnTapped:(id)sender
{

    [GPPSignInButton class];
    [GPPSignIn sharedInstance].clientID =[NSString stringWithFormat:@"MY APP ID"];
    GPPSignIn *signIn = [GPPSignIn sharedInstance];
    signIn.delegate = self;
    signIn.shouldFetchGoogleUserEmail = YES;
    signIn.shouldFetchGoogleUserID = YES;
    signIn.actions = [NSArray arrayWithObjects:
                      @"http://schemas.google.com/AddActivity",
                      @"http://schemas.google.com/BuyActivity",
                      @"http://schemas.google.com/CheckInActivity",
                      @"http://schemas.google.com/CommentActivity",
                      @"http://schemas.google.com/CreateActivity",
                      @"http://schemas.google.com/ListenActivity",
                      @"http://schemas.google.com/ReserveActivity",
                      @"http://schemas.google.com/ReviewActivity",
                      nil];
    [signIn trySilentAuthentication];
}

(void)finishedWithAuth:(GTMOAuth2Authentication *)auth error:(NSError )error 
{
 if (error) 
{
 NSLog(@"Status: Authentication error: %@", error); 
}
 else
 {
 NSLog(@"Status: Authenticated");
 NSLog(@"Email: %@",[GPPSignIn sharedInstance].authentication.userEmail); 
GTLServicePlus plusService = [[[GTLServicePlus alloc] init] autorelease]; 
plusService.retryEnabled = YES; 
[plusService setAuthorizer:[GPPSignIn sharedInstance].authentication]; 
GTLQueryPlus *query = [GTLQueryPlus queryForPeopleGetWithUserId:@"me"]; 
[plusService executeQuery:query completionHandler:^(GTLServiceTicket *ticket, GTLPlusPerson *person, NSError *error)
 { 
if (error)
 { 
GTMLoggerError(@"Error: %@", error); 
}
 else
 { 
[person retain]; 
NSLog(@"%@", person.displayName); 
NSLog(@"%@", person.identifier); 
}
 }]; 
} 
}

但当我试图执行我的应用程序时,它会崩溃,说

' - [__ NSCFString gtm_stringByUnescapingFromURLArgument]:无法识别的选择器发送到实例0x9e435b0'

任何人都可以帮助我... !!!

提前致谢!!!

Answer 1

是的,你需要-ObjC链接器标志,它没有找到GoogleOpenSource框架中的一个类别.

请参阅设置指南中的第3步:https://developers.google.com/+/mobile/ios/getting-started#step_3_initialize_the_google_client

基本上,在其他链接器标志中,添加-ObjC(大写很重要,请注意!).另外,请确保您已在项目中包含GooglePlus和GoogleOpenSource框架.