I was testing iOS9 in my iPhone5 and I have realized that my API calls doesn't run. I made the call but it doesn't send anything to my backend.
This is my method:
-(void)placePostRequest:(NSString *)action withData:(NSDictionary *)dataToSend withHandler:(void (^)(NSURLResponse *response, NSData *data, NSError *error))ourBlock {
    NSString *urlString = [NSString stringWithFormat:@"%@/%@", URL_API, action];
    NSLog(urlString);
    NSURL *url = [NSURL URLWithString:urlString];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    // Creamos el JSON desde el data
    NSError *error;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dataToSend options:0 error:&error];
    NSString *jsonString;
    if (! jsonData) {
        NSLog(@"Got an error: %@", error);
    } else {
        jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
        NSData *requestData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString lengthOfBytesUsingEncoding:NSUTF8StringEncoding]];
        [request setHTTPMethod:@"POST"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
        [request setHTTPBody: requestData];
        [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:ourBlock];
    }
}
HTTPResponse is nil and code 0:

This is what I received:
2015-06-15 13:40:48.176 myProject[291:33222] CFNetwork SSLHandshake failed (-9824)
2015-06-15 13:40:48.181 myProject[291:33222] NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9824)
