iOS汉字转拼音

//汉字转为拼音(类目)#import <Foundation/Foundation.h>@interface NSString (HZToPinyin)- (NSString *)transformToPinyin;@end#import "NSString+HZToPinyin.h"@implementation NSString (HZToPinyin)- (NSString *)transformToPinyin {    NSMutableString *mutableString = [NSMutableString stringWithString:self];    CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);    mutableString = (NSMutableString *)[mutableString stringByFoldingWithOptions:NSDiacriticInsensitiveSearch locale:[NSLocale currentLocale]];    return mutableString;}@end