我正在编写一个应该显示当前AdSense数据的应用程序,我的问题是我每次打开应用程序时都会提示我使用GTMAuth2ViewControllerTouch,所以熟悉的Google OAuth 2.0登录界面(我用
this来登录这些东西).如何登录,然后用户永远登录?在教程中有一个kKeychainItemName,但它只是一个字符串,我如何使用它来自动登录用户?看看ViewDidLoad.
这是我使用的代码:
#import "ViewController.h"
#import "GTMOAuth2Authentication.h"
#import "GTMOAuth2ViewControllerTouch.h"
#import "GTMOAuth2SignIn.h"
#import "GTMHTTPFetcher.h"
static NSString *const kKeychainItemName = @"OAuth2 AdZen: AdSense";
NSString *kMyClientID = @"xxxxxxxxx.apps.xxxxxxxxxxxxx.com"; // pre-assigned by service
NSString *kMyClientSecret = @"xxxxxxxxxx--xxxxx"; // pre-assigned by service
NSString *scope = @"https://www.googleapis.com/auth/adsense.readonly"; // scope for Google+ API
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
if (/*USER ALREADY LOGGED IN*/) {
//DO THE LOGIN STUFF AUTOMATICALLY WITH THE KEYCHAINITEM
}
else
{
[self signInToGoogle];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)signInToGoogle
{
GTMOAuth2ViewControllerTouch *viewController;
viewController = [[GTMOAuth2ViewControllerTouch alloc] initWithScope:scope
clientID:kMyClientID
clientSecret:kMyClientSecret
keychainItemName:kKeychainItemName
delegate:self
finishedSelector:@selector(viewController:finishedWithAuth:error:)];
[self.navigationController pushViewController:viewController animated:YES];
}
- (void)viewController:(GTMOAuth2ViewControllerTouch *)viewController
finishedWithAuth:(GTMOAuth2Authentication *)auth
error:(NSError *)error {
if (error != nil) {
// Authentication failed
UIAlertView *fail = [[UIAlertView alloc] initWithTitle:@"AdZen"
message:[NSString stringWithFormat:@"Error, Authentication failed!\n %@",error]
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:@"Try again", nil];
fail.tag = 1;
[fail show];
NSLog(@"Authentication failed!");
} else {
// Authentication succeeded
UIAlertView *success = [[UIAlertView alloc] initWithTitle:@"AdZen"
message:[NSString stringWithFormat:@"Authentication succeeded!"]
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
success.tag = 2;
;
NSLog(@"Autzentication succeeded!");
}
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1)
{
if (alertView.tag == 1) {
[self signInToGoogle];
}
}
}
- (void)authentication:(GTMOAuth2Authentication *)auth
request:(NSMutableURLRequest *)request
finishedWithError:(NSError *)error {
if (error != nil) {
NSLog(@"Authentication failed! 1");
} else {
// Authentication succeeded
NSLog(@"Autzentication succeeded! 1");
}
}
- (void)awakeFromNib {
// Get the saved authentication, if any, from the keychain.
GTMOAuth2Authentication *auth;
auth = [GTMOAuth2ViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName
clientID:kMyClientID
clientSecret:kMyClientSecret];
// Retain the authentication object, which holds the auth tokens
//
// We can determine later if the auth object contains an access token
// by calling its -canAuthorize method
//[self setAuthentication:auth];
//NSLog(@"Already logged in!");
}
-(IBAction)signout
{
[GTMOAuth2ViewControllerTouch removeAuthFromKeychainForName:kKeychainItemName];
UIAlertView *signedout = [[UIAlertView alloc] initWithTitle:@"AdZen"
message:@"You just signed out, please sign in to see your AdSense info."
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[signedout show];
[self signInToGoogle];
}
最佳答案 在“awakeFromNib:”方法中,检查身份验证以了解用户是否已签名.如果用户已登录,则导航到您希望在签名后获取用户的下一个视图或下一个屏幕.
-(void)awakeFromNib {
GTMOAuth2Authentication *auth = nil;
auth = [GTMOAuth2ViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName
clientID:kMyClientID
clientSecret:kMyClientSecret];
//Retain the authentication object, which holds the auth tokens
[self setAuthentication:auth];
//self.auth = auth;
if([self isSignedIn]) {
NextViewController *nextViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"NextViewController"];
[self.navigationController pushViewController:nextViewController animated:YES];
}
}
- (void)setAuthentication:(GTMOAuthAuthentication *)auth {
mAuth = nil;
mAuth = [auth retain];
}
在这里,您可以通过调用’-canAuthorize’方法来检查用户是否已获得授权.它检查授权并返回true flag(如果已授权).
(BOOL)isSignedIn
{
BOOL isSignedIn = self.auth.canAuthorize;
return isSignedIn;
}