文字转拼音

@interface TGConvertPY : NSObject
+ (TGConvertPY *)sharedInstance;
- (NSString *)toPinyin: (NSString *)source;
@end

@interface TGConvertPY()
{
    int     *_codeIndex;
    char    *_pinyin;
    BOOL    _inited;
}

@end

@implementation TGConvertPY

+ (TGConvertPY *)sharedInstance
{
    static TGConvertPY *instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[TGConvertPY alloc] init];
    });
    return instance;
}

- (NSString *)toPinyin: (NSString *)source
{
    if ([source length] == 0)
    {
        return nil;
    }
    NSMutableString *mutableString = [NSMutableString stringWithString:source];
    CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);
    mutableString = (NSMutableString *)[mutableString stringByFoldingWithOptions:NSDiacriticInsensitiveSearch locale:[NSLocale currentLocale]];
    return [mutableString stringByReplacingOccurrencesOfString:@"'" withString:@""];
}