iOS汉字转拼音

//汉字转拼音
- (NSString *)transformToPinyin {
NSMutableString *mutableString = [NSMutableString stringWithString:self];
CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);
mutableString = (NSMutableString *)[mutableString stringByFoldingWithOptions:NSDiacriticInsensitiveSearch locale:[NSLocale currentLocale]];
return mutableString;
}