iOS开发中如何更快的实现汉字转拼音

第一阶段：git开源工具：PinYin4Objc

第二阶段：网友推荐方法

- (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

- (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/

- (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

- (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

文章来源：http://www.olinone.com