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我在一个带有一个viewController的应用程序中使用GMTOAuth2，它工作正常，然后我将相同的代码添加到另一个包含更多viewControllers的应用程序中，它加载了带有用户名和密码文本字段的webView，但是如果我单击此视图中的任何内容，它会崩溃线程 1：EXC_BAD_ACCESS (code=2, address=0xbf7ffffc) with void SendDelegateMessage(NSInvocation *): delegate (webView:decidePolicyForNavigationAction:request:frame:decisionListener:) 在等待 10 秒后未能返回。主运行循环模式：控制台中的 kCFRunLoopDefaultMode。我的授权部分代码如下所示：

- (void)awakeFromNib {
    [super awakeFromNib];
    GTMOAuth2Authentication *auth = nil;
    auth = [GTMOAuth2ViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName
                                                             clientID:kMyClientID
                                                         clientSecret:kMyClientSecret];
    if (auth)
    {
        [auth authorizeRequest:nil
                  delegate:self
         didFinishSelector:@selector(authentication:request:finishedWithError:)];
    }


}


- (void)signInToGoogle {
    [self signOut];

    NSString *keychainItemName = kKeychainItemName;

    NSString *scope = @"https://spreadsheets.google.com/feeds https://docs.google.com/feeds";
    NSString *clientID = kMyClientID;
    NSString *clientSecret = kMyClientSecret;

    if ([clientID length] == 0 || [clientSecret length] == 0) {
        NSString *msg = @"The sample code requires a valid client ID and client secret to sign in.";
        [self displayAlertWithMessage:msg];
        return;
    }

    SEL finishedSel = @selector(viewController:finishedWithAuth:error:);

    GTMOAuth2ViewControllerTouch *viewController = [[GTMOAuth2ViewControllerTouch alloc]     initWithScope:scope
                                                                                              clientID:clientID
                                                                                          clientSecret:clientSecret
                                                                                  keychainItemName:keychainItemName
                                                                                  finishedSelector:finishedSel];
                                                                                          delegate:self
    [self presentViewController:viewController animated:YES completion:^{}];

    [[self navigationController] pushViewController:viewController animated:YES];


}

- (void)authentication:(GTMOAuth2Authentication *)auth
           request:(NSMutableURLRequest *)request
     finishedWithError:(NSError *)error {
    if (error != nil) {
        NSLog(@"error!");
    } else {
        [self isAuthorizedWithAuthentication:auth];
        self.auth = auth;    
    }
}

并将相同的类从第一个应用程序复制到第二个应用程序，并制作完全相同的 nib 文件。

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