苹果系统代码汉字转拼音

调用CFStringTransform方法进行汉字转拼音和拼音转英文： 

    NSString *hanziText = @"我是中国人";
    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);
        }
    }