ios - 解析 JSON 消息以在 iOS 5 上检索 Twitter 数据

Question

我正在尝试在我的应用程序中显示从 Obama twitter profile 检索到的一些公共(public)推文.为了检索推特数据，我实现了这个 getTweets 方法:

-(void)getTweets
{
    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
    [params setObject:@"Obamabarak" forKey:@"screen_name"];
    [params setObject:@"10" forKey:@"count"];
    [params setObject:@"1" forKey:@"include_entities"];
    [params setObject:@"1" forKey:@"include_rts"];


    NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/user_timeline.json"];

    TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:params requestMethod:TWRequestMethodGET];

    [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error)
    {
        if (error != nil)
        {
            //  Inspect the contents of error 
            exit(-1);
        }
        else
        {
            [self fetchJSONData:responseData];
        }
    }
}

此时，我尝试按如下方式实现 fetchJSONData 方法:

- (void)fetchJSONData:(NSData *)responseData
{
NSError* error;

NSDictionary* jsonResults = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];

NSArray *myArrayOfDictionaries = [[jsonResults objectForKey:@"tweets"] objectForKey:@"results"];

for (NSDictionary *myDictionary in myArrayOfDictionaries)
{
    // Get title of the image
    NSString *title = [myDictionary objectForKey:@"title"];
    ...

但是不起作用，没有显示任何记录。我不确定这是否是正确的方法，我不知道如何进行。你能帮我找到一种显示奥巴马推文的方法吗？

提前致谢

Answer 1

我终于摆脱了这个问题:

if ([urlResponse statusCode] == 200)
{
    // Parse the responseData, which we asked to be in JSON format for this request
    NSError *jsonParsingError = nil;
    //this is an array of dictionaries
    arrayTweets = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&jsonParsingError];

    //point to the first tweet
    NSDictionary *aTweet = [arrayTweets objectAtIndex:0];

    //write to log
    NSLog(@"text: %@", [aTweet objectForKey:@"text"]);
    NSLog(@"created_at: %@", [aTweet objectForKey:@"created_at"]);
}

我没有在互联网上找到任何好的示例，但这对我有用!!!

亚萨