iOS 汉字转拼音

NSString *hanziText =
@"天津";

    if ([hanziText
length]) {

        NSMutableString *ms = [[NSMutableString
alloc] initWithString:hanziText];

        if (CFStringTransform((__bridge
CFMutableStringRef)ms, 0,
kCFStringTransformMandarinLatin, NO)) {

            NSLog(@"pinyin: %@", ms);

        }

        if (CFStringTransform((__bridge
CFMutableStringRef)ms, 0,
kCFStringTransformStripDiacritics, NO)) {

            NSLog(@"pinyin: %@", ms);

        }  

    }