examples/objective-c/auth_sample/SelectUserViewController.m

/*
 *
 * Copyright 2015, Google Inc.
 * All rights reserved.
 *
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#import "SelectUserViewController.h"

#import "MakeRPCViewController.h"

@implementation SelectUserViewController

- (void)viewDidLoad {
  [super viewDidLoad];

  self.signOutButton.layer.cornerRadius = 5;
  self.signOutButton.hidden = YES;

  // As instructed in https://developers.google.com/identity/sign-in/ios/sign-in
  GIDSignIn *signIn = GIDSignIn.sharedInstance;
  signIn.delegate = self;
  signIn.uiDelegate = self;

  // As instructed in https://developers.google.com/identity/sign-in/ios/additional-scopes
  if (![signIn.scopes containsObject:kTestScope]) {
    signIn.scopes = [signIn.scopes arrayByAddingObject:kTestScope];
  }

  [signIn signInSilently];
}

- (void)signIn:(GIDSignIn *)signIn
didSignInForUser:(GIDGoogleUser *)user
     withError:(NSError *)error {
  if (error) {
    // The user probably cancelled the sign-in flow.
    return;
  }

  self.mainLabel.text = [NSString stringWithFormat:@"User: %@", user.profile.email];
  NSString *scopes = [user.accessibleScopes componentsJoinedByString:@", "];
  scopes = scopes.length ? scopes : @"(none)";
  self.subLabel.text = [NSString stringWithFormat:@"Scopes: %@", scopes];

  self.signInButton.hidden = YES;
  self.signOutButton.hidden = NO;
}

- (IBAction)didTapSignOut {
  [GIDSignIn.sharedInstance signOut];

  self.mainLabel.text = @"Please sign in.";
  self.subLabel.text = @"";

  self.signInButton.hidden = NO;
  self.signOutButton.hidden = YES;
}

@end