iOS开发中如何更快的实现汉字转拼音

最新推荐文章于 2020-05-10 10:45:56 发布

转载最新推荐文章于 2020-05-10 10:45:56 发布 · 138 阅读

本文介绍了一种逐步优化的拼音转换算法，从原始方法到使用正则表达式过滤英文数字特殊字符，再到利用CFStringTransform进行拉丁化和去重音，最终实现了一个高效且精确的拼音转换过程。提供了源代码和演示应用，欢迎通过GitHub链接进一步了解和使用。

博客转载：http://www.olinone.com/?p=131

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
        ]
        ;
       
        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
        :
        [
        NSLocale
         
        currentLocale
        ]
        ]
        ;
       
        return
         
        mutableString
        ;
       
        }