将非英文字符转换为英文字符

3

好的,我的情况是这样的。

首先,我正在通过通讯录获取联系人姓名,并显示姓名,该名称可能包含英语、非英语(中文、日语等)、符号等。我现在面临的问题是非英语字符不会按照组分组,例如假设'X'属于组'G',但它显示在下一组中。如下所示,这个汉字应该属于组'G'。

sample

我看到了代码中的一个条件,即当它不在A-Z范围内时,它会将它们分组在“#”组中。该代码不是我编写的,我目前正在进行错误修复。那么这个索引完全是手动自定义的,所以...

有没有办法知道字符是符号还是非英语字符?或者有没有一种方法可以按组从通讯录中获取联系人?

下面的代码是检查字符应该分组的部分。

name = [name stringByTrimmingCharactersInSet:[NSCharacterSet punctuationCharacterSet]];
selectCharacter = [[name uppercaseString] characterAtIndex:0];

if( (selectCharacter > 'Z') || (selectCharacter < 'A')){
                        selectCharacter = '#';
                }

        if( currentCharacter != selectCharacter ){
            // Store Old
            if( currentCharacter > 0 ){
                NSMutableArray * data =  [allPeopleSectionIndex lastObject];
                [data insertObject:[NSNumber numberWithInt:currentCount] atIndex:2];
            }

            // Setup for New
                        currentCharacter = selectCharacter;
            currentCount = 1;
            currentCharacterIndex ++;

            // 0: char, 1: section start, 2: count
            NSMutableArray * data = [[NSMutableArray alloc] initWithObjects:
                                     [NSString stringWithFormat:@"%c", currentCharacter], 
                                     [NSNumber numberWithInt:i], 
                                     [NSNumber numberWithInt:0],
                                     nil];
            [allPeopleSectionIndex addObject:data];
            [data release];

        } else {
            currentCount++;
}
4个回答

3
我找到了一种方法来读取中文字符并按A-Z字母表进行组织。这是我从该网站(中文网站)找到的文件。如果有需要,我会包含代码。请注意,我不确定这是否是正确的方法。
假设我将此类称为Pinyin。
Pinyin.h
@interface Pinyin : NSObject {

}

- (char) pinyinFirstLetter:(unsigned short) hanzi;

@end

Pinyin.m

#import "Pinyin.h"

#define HANZI_START 19968  
#define HANZI_COUNT 20902

@implementation Pinyin
static char firstLetterArray[HANZI_COUNT] = "ydkqsxnwzssxjbymgcczqpssqbycdscdqldylybssjgyqzjjfgcclzznwdwzjljpfyynnjjtmynzwzhflzppqhgccyynmjqyxxgd"
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"xy";

- (char) pinyinFirstLetter:(unsigned short) hanzi{
    int index = hanzi - HANZI_START;
    if (index >= 0 && index <= HANZI_COUNT) {
        return firstLetterArray[index];
    }else{
        //anything that not recognize will return as a '#'
        return '#';
    }
}
@end

这个方法会根据英文字母返回对应的中文字符(但是有些日语汉字会被认为是中文,这并不正确)。

使用这个方法的示例:

char selectedChar = 0;
if ([name canBeConvertedToEncoding: NSASCIIStringEncoding]) {//if english
  selectedChar = [[name uppercaseString] characterAtIndex:0];
}else { //if not english
  Pinyin *pinyin = [[Pinyin alloc]init];

  //return the english alphabet
  selectedChar = [pinyin pinyinFirstLetter: /* Pass in the character here */];

  [pinyin release];
}

如果你有任何方法、想法或建议,请也告诉我。我仍然需要一种能够阅读日语并将其组织成组的方法。
注:原作者为该内容的出处。

1

始终使用rangeOfComposedCharacterSequenceAtIndex:是一个好主意,以确保您处理由多个unichar序列组成的单个字符(这很可能是导致您不正确分组非英语字符的原因),并使用stringByFoldingWithOptions:locale:确保您将带重音的字符缩减为适当的公共基本形式(请注意,折叠字符为小写)。

因此,请按以下方式形成您的selectCharacter:

NSRange range = [name rangeOfComposedCharacterSequenceAtIndex: 0];
NSString* initialChar = [name substringWithRange: range];
NSString* initialCharFolded = 
    [initialChar
        stringByFoldingWithOptions: 
            NSCaseInsensitiveSearch
          + NSDiacriticInsensitiveSearch
          + NSWidthInsensitiveSearch
        locale: [NSLocale currentLocale]];
if ([initialCharFolded length] == 1)
    selectCharacter = [[initialCharFolded uppercaseString] characterAtIndex: 0];
else
    selectCharacter = '#';

if (selectCharacter > 'Z' || selectCharacter < 'A')
    selectCharacter = '#';

HTH


它仍然无法工作。那些非英文字符没有组织到它们的组中。 - Sola
我已经找到了一个读取“中文”拼写的解决方案,并且它成功了。唯一的问题是它只适用于中文字符,其他字符则不行。 - Sola
你的代码并不完全符合我的要求,但它可以将那些拉丁字符读成英文。 - Sola

1

正确的方法是使用 UILocalizedIndexedCollation 类,即使您不将其用作表视图的索引。

NSInteger index = [[UILocalizedIndexedCollation currentCollation] sectionForObject:chineseLetter collationStringSelector:@selector(self)];
NSString *englishLetter = [[UILocalizedIndexedCollation currentCollation] sectionIndexTitles] objectAtIndex:index];

请注意,如果您计划稍后将其用作索引,则不应使用currentCollation共享实例。该内容与IT相关。

你能提供一个如何使用它的例子吗?我认为这也是正确的方法。 - João Nunes
你的例子对于一些数据非常好。不知道是否有类似 NFRC 和 UILocalizedIndexedCollation 的例子。我要去找一下。 - João Nunes

0
当我为音乐库建立索引时,遇到了这个问题,因为该库包含多种语言。因此,这是我的解决方案:按字母顺序排序库(例如,使用NSSortDescriptor),获取第一个字母,然后使用某个固定步长分组指数=min(步长,字母计数)。
比如说,这样,步长=5:
[a a a a a a a a a a b b b c d e g g g h i i i i i i i k l m]
[a                   b         e         i             k

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原文链接