Question

我是iOS开发的新手，我一直坚持这个bug。我正在制作一个使用网络服务的简单应用程序。现在我目前有两个视图控制器。登录视图控制器（带有NIB文件）和主视图控制器（带有NIB文件）。当我创建应用程序时，我选择了一个空的应用程序，所以我没有故事板。相反，我正在使用UINavigationController。当我运行我的代码后，输入我的用户名和密码并在登录视图中按提交后出现以下错误：

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIKeyboardTaskQueue waitUntilAllTasksAreFinished] may only be called from the main thread.'

这是我提交按钮的代码：

-(IBAction)logIn:(id)sender{
    UIApplication *application = [UIApplication sharedApplication];
    application.networkActivityIndicatorVisible = YES;

    [_loginNetworkingContorller checkCredentialsWithUsername:self.username.text withPassword:self.password.text completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        if(!error){
            NSHTTPURLResponse *httpResp = (NSHTTPURLResponse*) response;
            if (httpResp.statusCode == 200) {
                NSLog(@"SUCESS");
                NSDictionary *credentials = @{self.username.text: self.password.text};
                [KeychainUserPass save:@"MY APP" data:credentials];
                UIViewController *mainView = [[RDMainViewController alloc] initWithNibName:@"RDMainViewController" bundle:nil];

                [self.navigationController pushViewController:mainView animated:YES];
            }
            else{
                NSLog(@"ERROR");
            }
        }
        else{
            NSLog(@"ERROR");
        }
    }];
}

这是以下函数的代码

[_loginNetworkingContorller checkCredentialsWithUsername:self.username.text withPassword:self.password.text completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)

-(void)checkCredentialsWithUsername:(NSString *)username withPassword:(NSString *)password completionHandler:(void (^)(NSData *data,NSURLResponse *response, NSError *error))myCompletion
{
    NSString *requestString = @"SOME WEBSITE";
    NSURL *url = [NSURL URLWithString:requestString];
    NSURLRequest *req = [NSURLRequest requestWithURL:url];

    NSData *userPasswordData = [[NSString stringWithFormat:@"%@:%@", username, password] dataUsingEncoding:NSUTF8StringEncoding];
    NSString *base64EncodedCredential = [userPasswordData base64EncodedStringWithOptions:0];
    NSString *authString = [NSString stringWithFormat:@"Basic %@", base64EncodedCredential];

    NSURLSessionConfiguration *sessionConfig=[NSURLSessionConfiguration defaultSessionConfiguration];
    sessionConfig.HTTPAdditionalHeaders=@{@"Authorization":authString};

    self.session=[NSURLSession sessionWithConfiguration:sessionConfig];

    NSURLSessionDataTask *dataTask = [self.session dataTaskWithRequest:req completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        myCompletion(data, response, error);
    }];

    [dataTask resume];
}

我现在陷入困境，并不确定问题是什么，特别是因为我对键盘没有做任何事情。我觉得我的积木存在问题，但我不确定问题是什么。任何帮助将不胜感激。

Answer 1

嘿，在我收到网络电话的回复后，我遇到了同样的问题。我能够解决它做以下事情：

 //do something with response

  dispatch_async(dispatch_get_main_queue()) { () -> Void in

     // continue with program by calling next step on main thread           
  }

我认为如果你推到下一个视图控制器iOS试图在不是主线程上做，导致错误，但我不是100％是准确的

UIKeyboardTaskQueue线程问题

1 个答案: