【iOS】汉字转拼音

最近在做字符串转拼音的速度优化，现分享给大家，各位朋友有什么想法可以给我留言，谢谢！

 

第一阶段：git开源工具：PinYin4Objc

第二阶段：网友推荐方法

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- (NSString *)transformToPinyin {

    NSMutableString *mutableString = [NSMutableString stringWithString:self];

    CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);

    CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformStripDiacritics, false);

    return mutableString;

}

第三阶段： 正则表达式优先过滤英文数字特殊字符等

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-(NSString*)transformToPinyin{

    NSMutableString*mutableString=[NSMutableString stringWithString:self];

    BOOLisNeedTransform=![selfisAllEngNumAndSpecialSign];

    if(isNeedTransform){

        CFStringTransform((CFMutableStringRef)mutableString,NULL,kCFStringTransformToLatin,false);

        CFStringTransform((CFMutableStringRef)mutableString,NULL,kCFStringTransformStripDiacritics,false);

    }

    returnmutableString;

}

 

-(BOOL)isAllEngNumAndSpecialSign{

    NSString*regularString=@"^[A-Za-z0-9\\p{Z}\\p{P}]+$";

    NSPredicate*predicate=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",regularString];

    return[predicate evaluateWithObject:self];

}

第四阶段：参考http://nshipster.com/cfstringtransform/

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- (NSString *)transformToPinyin {

    NSMutableString *mutableString = [NSMutableString stringWithString:self];

    BOOL isNeedTransform = ![self isAllEngNumAndSpecialSign];

    if (isNeedTransform) {

        CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);

        CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformStripCombiningMarks, false);

    }

    return mutableString;

}

 

- (BOOL)isAllEngNumAndSpecialSign {

    NSString *regularString = @"^[A-Za-z0-9\\p{Z}\\p{P}]+$";

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regularString];

    return [predicate evaluateWithObject:self];

}

第五阶段：终极优化版

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-(NSString*)transformToPinyin{

    NSMutableString*mutableString=[NSMutableString stringWithString:self];

    CFStringTransform((CFMutableStringRef)mutableString,NULL,kCFStringTransformToLatin,false);

    mutableString=(NSMutableString*)[mutableString stringByFoldingWithOptions:NSDiacriticInsensitiveSearch locale:[NSLocalecurrentLocale]];

    returnmutableString;

}