调整了代码，现在看来可以了.基本上将URL的末尾拆分为POST的正文.

Adjusted your code and this now seems to work. Basically split end of URL into the body of the POST.

    // Split URL from Body
    NSURL *url = [NSURL URLWithString:@"http://www.overpass-api.de/api/interpreter"];
    NSString *body=@"?data=[out:json];(way(around:150,49.4873181,8.4710548)[\"maxspeed\"];);out body;>;out skel;";
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                           cachePolicy:NSURLRequestReloadIgnoringCacheData
                                                       timeoutInterval:25];

    // Add body to the request
    [request setHTTPMethod: @"POST"];
    [request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];

    NSError *requestError;
    NSURLResponse *urlResponse = nil;


    NSData *response1 = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&requestError];
    NSLog(@"%@", response1);
    NSLog(@"%@", requestError);

    NSString *myString = [[NSString alloc] initWithData:response1 encoding:NSUTF8StringEncoding];
    NSLog(@"myString: %@", myString);