使用Fabric SDK iOS访问Twitter用户时间线

我试图在这个问题上挣扎两天.我正在使用Fabric SDK和Rest工具包,试图为Twitter使用不同的Rest API Web服务.我可以使用具有authTokenSecret,authToken和其他值的会话对象的TWTRLogInButton成功登录.当我尝试获取用户时间线时,我总是得到失败的响应,作为：

{“errors”：[{“code”：215,“message”：“Bad Authentication data.”}]}

完整错误日志是：

E restkit.network:RKObjectRequestOperation.m:297 Object request Failed: Underlying HTTP request operation Failed with error: Error Domain=org.restkit.RestKit.ErrorDomain Code=-1011 "Expected status code in (200-299),got 400" UserInfo=0x1780f6f80 {NSLocalizedRecoverySuggestion={"errors":[{"code":215,"message":"Bad Authentication data."}]},NSErrorFailingURLKey=https://api.twitter.com/1.1/statuses/user_timeline.json?user_id=3116882322&count=2&screen_name=ann_10p,AFNetworkingOperationFailingURLRequestErrorKey=<NSMutableuRLRequest: 0x178202740> { URL: https://api.twitter.com/1.1/statuses/user_timeline.json?user_id=3116882322&count=2&screen_name=ann_10p },AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x1702271e0> { URL: https://api.twitter.com/1.1/statuses/user_timeline.json?user_id=3116882322&count=2&screen_name=ann_10p } { status code: 400,headers {
    "content-encoding" = gzip;
    "Content-Length" = 87;
    "Content-Type" = "application/json;charset=utf-8";
    Date = "Wed,01 Apr 2015 09:46:42 GMT";
    Server = "tsa_a";
    "Strict-Transport-Security" = "max-age=631138519";
    "x-connection-hash" = 4c123a59a023cd86b2e9a3e9fc84cd7b;
    "x-response-time" = 4;
} },NSLocalizedDescription=Expected status code in (200-299),got 400}


2015-04-01 14:47:13.223 TwitterIntegration[1086:60b] I restkit.network:RKHTTPRequestOperation.m:154 GET 'https://api.twitter.com/1.1/statuses/user_timeline.json?user_id=3116882322&count=2&screen_name=ann_10p'
2015-04-01 14:47:13.225 TwitterIntegration[1086:60b] E restkit.network:RKHTTPRequestOperation.m:178 GET 'https://api.twitter.com/1.1/statuses/user_timeline.json?user_id=3116882322&count=2&screen_name=ann_10p' (400 Bad Request) [0.0013 s]: Error Domain=org.restkit.RestKit.ErrorDomain Code=-1011 "Expected status code in (200-299),got 400}

码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view,typically from a nib.

    [self addLoginButton];

}

-(void) addLoginButton
{
    TWTRLogInButton *logInButton = [TWTRLogInButton buttonWithLogInCompletion:^(TWTRSession *session,NSError *error) {
        // play with Twitter session


        if(session)
        {
            NSLog(@"logged in success! with session : %@",session);
            [Global sharedInstance].session = session;
            [self requestUserTimeline];
        }
        else
        {
            NSLog(@"session is null");

        }

    }];
    logInButton.center = self.view.center;
    [self.view addSubview:logInButton];

}

-(void) requestUserTimeline
{
    RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[UserTimeline class]];
    [mapping addAttributeMappingsFromDictionary:@{
                                                  @"text":   @"tweetText",@"favorited":     @"favourited",@"created_at":        @"createdAt",@"user.name":        @"name",@"id":        @"tweetID",@"user.profile_image_url":  @"profileImageURL"
                                                  }];

    NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful); // Anything in 2xx
    RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping pathPattern:nil keyPath:nil statusCodes:statusCodes];
    Nsstring *params = [Nsstring stringWithFormat:@"?user_id=3116882322&count=2&screen_name=ann_10p",[Global sharedInstance].session.userID,[Global sharedInstance].session.userName];
    NSMutableuRLRequest *request = [NSMutableuRLRequest requestWithURL:[NSURL URLWithString:[@"https://api.twitter.com/1.1/statuses/user_timeline.json" stringByAppendingString:params]]];
    [request setHTTPMethod:@"GET"];
    RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[responseDescriptor]];
    [operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation,RKMappingResult *result) {
        UserTimeline *timeline = [result firstObject];
        NSLog(@"Mapped the article: %@",timeline);
    } failure:^(RKObjectRequestOperation *operation,NSError *error) {
        NSLog(@"Failed with error: %@",[error localizedDescription]);
    }];
    [operation start];
}

请帮我调试这个问题.谢谢.

解决方法

在使用Fabric SDK进行实验后,我成功地进行了集成.我得出了一些结论,并希望与你们分享.

1)当您第一次成功登录Twitter时,已为用户创建了一个TWTRSession会话.即使您关闭应用程序并重新打开它,它也会持续.

2)如果已经为您创建了会话,并且您尝试登录获取另一个会话对象而不注销,则将返回身份验证错误.

3)您可以使用以下方法检查会话是否存在：

if([[Twitter sharedInstance] session])
{
   NSLog(@"session already present!!!");
   NSLog(@"signed in as %@",[[[Twitter sharedInstance] session] userName]);
}
else
{
NSLog(@"you need to login!!");
}

4)我会建议使用登录

[[Twitter sharedInstance] logInWithCompletion：^(TWTRSession * session,NSError * error)];

代替：

[TWTRLogInButton buttonWithLogInCompletion：^(TWTRSession * session,NSError * error)];

Use Twitter’s login button only,when you are sure that no session
exists currently.

5)如果Twitter的身份验证真的取笑你,请卸载该应用程序并尝试全新安装.这是最后的解决方案！

6)要从会话注销,请使用[[Twitter sharedInstance] logout];

编码部分：

我假设您已经按照Fabric mac app执行了所有步骤.

首先登录用户,然后发出时间表请求.

-(void) loginUserToTwitter
{
    if([[Twitter sharedInstance] session])
    {
        NSLog(@"session already present!!!");
        NSLog(@"signed in as %@",[[[Twitter sharedInstance] session] userName]);
        [self getUserTimeline];
    }
    else
    {
        NSLog(@"session not found. Make new request!");

        [[Twitter sharedInstance] logInWithCompletion:^(TWTRSession *session,NSError *error) {

            if(error)
                NSLog(@"error occurred... %@",error.localizedDescription);
            else
            {
                NSLog(@"Successfully logged in with session :%@",session);
               [self getUserTimeline];
            }

        }];
    }

}

-(void) getUserTimeline
{
    NSURLRequest *request = [[[Twitter sharedInstance] apiclient] URLRequestWithMethod:@"GET" URL:@"https://api.twitter.com/1.1/statuses/user_timeline.json"
       parameters:@{@"userid": [Twitter sharedInstance].session.userID,@"count" : @"5",@"screen_name" : [Twitter sharedInstance].session.userName} error:nil];

    NSURLResponse *response;
    NSError *error;
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    if(!data)
    {
        NSLog(@"error....: %@",error.localizedDescription);
    }
    else
    {
        Nsstring *string = [[Nsstring alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@",string);

        [twitterResponse removeAllObjects];

        NSArray *arrayRep = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        twitterResponse = [NSMutableArray arrayWithArray:[TWTRTweet tweetsWithJSONArray:arrayRep]];

        [_tableView reloadData];
    }
}

我更喜欢使用Twitter SDK的方法来使用[TWTRTweet tweetsWithJSONArray：arrayRep]而不是Restkit来提取推文.这里的事情真的很容易处理.

在Twitter的标准风格中显示推文：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view,typically from a nib.

    // Setup tableview
    self.tableView.estimatedRowHeight = 150;
    self.tableView.rowHeight = UITableViewAutomaticDimension; // Explicitly set on iOS 8 if using automatic row height calculation
    self.tableView.allowsSelection = NO;
    [self.tableView registerClass:[TWTRTweetTableViewCell class] forCellReuseIdentifier:@"TweetCell"];

}

#pragma mark - Tableview Methods

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return twitterResponse.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static Nsstring *cellID = @"TweetCell";

    TWTRTweetTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID forIndexPath:indexPath];

    TWTRTweet *tweet = twitterResponse[indexPath.row];
    [cell configureWithTweet:tweet];

    return cell;
}

// Calculate the height of each row. Must to implement
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

        TWTRTweet *tweet = twitterResponse[indexPath.row];
        return [TWTRTweetTableViewCell heightForTweet:tweet width:CGRectGetWidth(self.view.bounds)];

}

注意：

从here下载Fabric SDK.您必须输入电子邮件地址.他们会通过电子邮件向您发送一些下载链接,您必须按照一些步骤操作. Fabric Mac App将让您完全配置xcode项目.

希望能帮助到你！

参考文献：

Twitter Login

Show Tweets

Cannonball Sample Project