不使用SLRequest对象

Question

我试图使用SLRequest类从中提取数据。当我使用程序下面的代码中记录的端点和参数时，程序“挂起”，没有打印JSON数据。我使用的端点是基于来自twitter开发网站https://dev.twitter.com/docs/streaming-apis/parameters#with的一个例子，我在某个位置请求tweet。

当我使用这段代码来使用REST查询我的时间线时(包含了代码和请求，但是注释掉了)，程序不会挂起，我会得到一个有效的响应。

在使用流API访问数据所需实现的代码中，是否还有其他东西需要实现？需要做哪些额外的修改或改变？

ACAccountStore * accountStore = [[ACAccountStore alloc] init];
ACAccountType * twitterAccountType =
[accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];

// Ask the user permission to access his account
[accountStore requestAccessToAccountsWithType:twitterAccountType options:nil completion:^(BOOL granted, NSError *error) {
    if (granted == NO) {
        NSLog(@"-- error: %@", [error localizedDescription]);
    }
    if (granted == YES){

       /***************** Create  request using REST API*********************
        ***************** This URL is functional and returns valid data *****
        NSURL * url = [NSURL URLWithString:@"https://userstream.twitter.com/1.1/user.json"];
         SLRequest * request = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:url parameters:@{@"screen_name": @"your_twitter_id"}];
        ***************************************************************/

        // Create request using Streaming API Endpoint
        NSURL * url = [NSURL URLWithString:@"https://stream.twitter.com/1.1/statuses/filter.json"];

        NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
        [params setObject:@"track" forKey:@"twitter&"];
        [params setObject:@"locations" forKey:@"-122.75,36.8,-121.75,37.8"];

        SLRequest * request = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodPOST URL:url parameters:params];

        NSArray * twitterAccounts = [accountStore accountsWithAccountType:twitterAccountType];

        if ([twitterAccounts count] == 0) {
            (NSLog(@"-- no accounts available"));
        } else if ([twitterAccounts count] >0){
            [request setAccount:[twitterAccounts lastObject]];
            NSLog([request.account description]);
            NSLog(@"Twitter handler of user is %@", request.account.username);

            // Execute the request
            [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
                NSError * jsonError = nil;
                NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingAllowFragments error:&jsonError];

                [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                    // NSLog(@"-- json Data is %@", json);
                    NSLog([json description]);
                }];

            }];

        }
    }

}];

Answer 1

SLRequest没有很好地使用流API。

下面是如何使用STTwitter

self.twitter = [STTwitterAPI twitterAPIOSWithAccount:account];

[_twitter verifyCredentialsWithSuccessBlock:^(NSString *username) {

    NSLog(@"-- access granted for %@", username);

    [_twitter postStatusesFilterUserIDs:nil
                        keywordsToTrack:@[@"twitter"]
                  locationBoundingBoxes:@[@"-122.75,36.8,-121.75,37.8"]
                              delimited:nil
                          stallWarnings:nil
                          progressBlock:^(id response) {
        NSLog(@"-- %@", response);
    } stallWarningBlock:^(NSString *code, NSString *message, NSUInteger percentFull) {
        NSLog(@"-- stall warning");
    } errorBlock:^(NSError *error) {
        NSLog(@"-- %@", [error localizedDescription]);
    }];

} errorBlock:^(NSError *error) {
    NSLog(@"-- %@", [error localizedDescription]);
}];

在内部，STTwitter使用来自-[SLRequest preparedURLRequest]的请求构建一个NSURLConnection实例。如果您愿意，可以在代码中复制这个诡计。