- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    [self test];

    // Override point for customization after application launch.

    return YES;

}

-(void)test {

    //XML文字範例

    NSString *testXMLString = @"Cake0.55RegularChocolateBlueberryNoneGlazedSugar";

    NSLog(@"xml string[n%@n]", testXMLString);

    // 解析XML為NSDictionary

    NSError *parseError = nil;

    NSDictionary *xmlDictionary = [XMLReader dictionaryForXMLString:testXMLString error:&parseError];

    // 列印 NSDictionary

    NSLog(@"%@", xmlDictionary);

    //NSDictionary轉換為Data

    NSData* jsonData = [NSJSONSerialization dataWithJSONObject:xmlDictionary options:NSJSONWritingPrettyPrinted error:&parseError];

    //Data轉換為JSON

    NSString* str = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    NSLog(@"jsonData string[n%@n]", str);

    //字元組轉換為NSDictionary

    NSDictionary *jsonDict = [str objectFromJSONString];

    //NSDictionary轉換為XML的plist格式

    NSData *xmlData = [NSPropertyListSerialization dataFromPropertyList:jsonDict

                                                                 format:NSPropertyListXMLFormat_v1_0

                                                       errorDescription:NULL];

    //Data轉換為NSString輸出 編碼為UTF-8

    NSLog(@"XML: %@", [[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding]);

    NSLog(@"%@",[XMLWriter XMLStringFromDictionary:jsonDict withHeader:NO]);

}

//其中用到了三個類庫，分別為

下面連線是XML轉換為Dictionary

https://github.com/nicklockwood/XMLDictionary

http://download.csdn.net/detail/p709723778/6706331