Google +在应用内登录

Question

我想将Google+登录功能集成到我的应用中。我使用过Google+ sdk，但它重定向到safari以登录到Google，我想在我的应用程序中打开该Web对话框。有人能帮助我解决这个问题吗？

Answer 1

我做到了。通过继承UIApplication类，然后在Web视图中处理URL。以下是代码：

将Google+ FrameWork添加到您的项目中。

现在，在身份验证调用中，通过嵌入UIAPPLICATION类来捕获该URL。

- (IBAction)btnGooglePlusTap:(id)sender 
{ 
    [[GPPSignIn sharedInstance] authenticate]; 
} 

SubClassUIApplication.h 

#import <UIKit/UIKit.h> 

#define ApplicationOpenGoogleAuthNotification @"GoogleFriendInvitationPosted" 

@interface SubClassUIApplication : UIApplication 

@end 


#import "SubClassUIApplication.h" 

@implementation SubClassUIApplication 

- (BOOL)openURL:(NSURL *)url 
{ 
    if([[url absoluteString] hasPrefix:@"googlechrome-x-callback:"]) 
    { 
     return NO;//This will prevent call to Google Chrome App if installed. 
    } 
    else if([[url absoluteString] hasPrefix:@"https://accounts.google.com/o/oauth2/auth"]) 
    { 
     [[NSNotificationCenter defaultCenter] postNotificationName:ApplicationOpenGoogleAuthNotification object:url]; 

     return NO;// Here we will pass URL to notification and from notification observer , we will load web view. 
    } 
    else if ([[url absoluteString] hasPrefix:@"com.google"]) 
    { 
     return NO; 
    } 

    return [super openURL:url]; 
} 

@end 

将此子类设置为info.plist文件中的主类。

现在打开URL发送到Web视图

- (void)catchNotificationforGooglePlusSharing:(NSNotification *)notiofication 
{ 
    NSURL *u=(NSURL *)notiofication.object; 

    UINavigationController *navWebView =(UINavigationController *) [self.storyboard instantiateViewControllerWithIdentifier:@"WebViewNavController"]; 

    WebViewController *vcWebView = navWebView.viewControllers[0]; 
    vcWebView.webURL = u; 
    [self.navigationController presentViewController:navWebView animated:YES completion:Nil]; 
} 

现在webviewcontroller.m

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    NSURLRequest *req= [[NSURLRequest alloc]initWithURL:webURL]; 

    [webvGoogle loadRequest:req]; 
} 
#pragma mark - UIWebViewDelegate method 
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 
{ 
    BOOL canHandle = [GPPURLHandler handleURL:request.URL sourceApplication:@"com.apple.mobilesafari" annotation:nil]; 

    if(canHandle == YES) 
    { 


     [self dismissViewControllerAnimated:YES completion:^ 
     { 

     }]; 
    } 

    return YES; 
} 

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error 
{ 
    NSLog(@"Error in loading : %@",error.description); 
} 

不要忘记注册您的类ApplicationOpenGoogleAuthNotification通知。

Answer 2

您可以使用Google Toolbox for Mac - OAuth 2 Controllers的GTMOAuth2ViewControllerTouch。

#import <GTMOAuth2ViewControllerTouch.h> 

GTMOAuth2ViewControllerTouch *googleAuthViewController = [[GTMOAuth2ViewControllerTouch alloc] 
         initWithScope:@"https://www.googleapis.com/auth/userinfo#email" 
         clientID:kClientId 
         clientSecret:kSecretId 
         keychainItemName:@"GooglePlus_Sample_App" 
         delegate:self 
         finishedSelector:@selector(viewController:finishedWithAuth:error:)]; 

[self.navigationController pushViewController:googleAuthViewController animated:YES]; 

这是在这里发现http://blog.krzyzanowskim.com/2015/02/22/google-sign-on-with-1password/样品，你可以找到完整的示例项目。