iOS 漢字轉拼音

原文http://www.olinone.com/?p=131 

最近在做字符串轉拼音的速度優化，現分享給大家，各位朋友有什麼想法可以給我留言，謝謝！

 

第一階段：git開源工具：PinYin4Objc

第二階段：網友推薦方法

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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; }

第三階段： 正則表達式優先過濾英文數字特殊字符等

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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, kCFStringTransformStripDiacritics, 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]; }

第四階段：參考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]; }

第五階段：終極優化版

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

Demo移步https://github.com/panghaijiao/PHJTransformPinyinDemo，喜歡請點贊，感謝你的來訪！