iOS5.0新功能之——NSJSONSerialization解析JSON数据

- (IBAction)touchWriteButton:(id)sender {
      NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
      [dictionary setValue:@"Anthony" forKey:@"First Name"];
      [dictionary setValue:@"Robbins" forKey:@"Last Name"];
      [dictionary setValue:[NSNumber numberWithUnsignedInteger:51] forKey:@"Age"];
      NSArray *arrayOfAnthonysChildren = [[NSArray alloc] initWithObjects:@"Anthony's Son 1", @"Anthony's Daughter 1", @"Anthony's Son 2", @"Anthony's Son 3", @"Anthony's Daughter 2", nil];
      [dictionary setValue:arrayOfAnthonysChildren forKey:@"children"];
      NSError *error = nil;
      NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictionary options:NSJSONWritingPrettyPrinted error:&error];
      if (error) {
         NSLog(@"dic->%@",error);
      }
      [dictionary release];
      BOOL succeed = [jsonData writeToFile:JSON_PATH atomically:YES];
      if (succeed) {
          NSLog(@"Save succeed");
      }else {
          NSLog(@"Save fail");
      }
}

- (IBAction)touchReadButton:(id)sender {
       NSData *jsonData = [[NSData alloc] initWithContentsOfFile:JSON_PATH];     /* Now try to deserialize the JSON object into a dictionary */
       NSError *error = nil;
       id jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&error];
      if (jsonObject != nil && error == nil){
          NSLog(@"Successfully deserialized...");
          if ([jsonObject isKindOfClass:[NSDictionary class]]){
               NSDictionary *deserializedDictionary = (NSDictionary *)jsonObject;
               NSLog(@"Dersialized JSON Dictionary = %@", deserializedDictionary);
          } else if ([jsonObject isKindOfClass:[NSArray class]]){
              NSArray *deserializedArray = (NSArray *)jsonObject;
              NSLog(@"Dersialized JSON Array = %@", deserializedArray);
          } else {
              NSLog(@"An error happened while deserializing the JSON data.");
          }
      }
      [jsonData release];
  }