taipei opendata test

gistfile1.m

    NSURL *url = [NSURL URLWithString:@"http://opendata.dot.taipei.gov.tw/opendata/alldescriptions.json"];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [NSURLConnection sendAsynchronousRequest:request
                                       queue:[NSOperationQueue mainQueue]
                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
                               unsigned long big5 = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingBig5_HKSCS_1999);
                               NSString *json = [[NSString alloc] initWithData:data encoding:big5];
                               NSError *error;
                               NSDictionary *dictionary =
                               [NSJSONSerialization JSONObjectWithData:[json dataUsingEncoding:NSUTF8StringEncoding]
                                                               options:kNilOptions
                                                                 error:&error];
                               NSLog(@"dict %@", dictionary);
    }];

可以解決iOS 連接JSON的編碼問題..