如何在 UILocalizedIndexedCollat​​ion 中将汉字排序为#

Posted 2023-02-27

【中文标题】如何在 UILocalizedIndexedCollat​​ion 中将汉字排序为#

【英文标题】：how to sort Chinese character into # in UILocalizedIndexedCollation

【发布时间】：2014-01-06 04:16:52

【问题描述】：

我想知道如何将汉字排序为“#”而不是 A-Z。

非常感谢任何 cmets。

-(NSArray *)partitionObjects:(NSArray *)array collationStringSelector:(SEL)selector

    self.collation = [UILocalizedIndexedCollation currentCollation];
    NSInteger sectionCount = [[self.collation sectionTitles] count];//section count is take from sectionTitles and not sectionIndexTitles
    NSMutableArray *unsortedSections = [NSMutableArray arrayWithCapacity:sectionCount];
    //create an array to hold the data for each section
    for(int i = 0; i < sectionCount; i++)
    
        [unsortedSections addObject:[NSMutableArray array]];
    
    //put each object into a section
    for (id object in array)
    
        NSInteger index = [self.collation sectionForObject:object collationStringSelector:selector];
        [[unsortedSections objectAtIndex:index] addObject:object];
    
    NSMutableArray *sections = [NSMutableArray arrayWithCapacity:sectionCount];
    //sort each section
    for (NSMutableArray *section in unsortedSections)
    
        [sections addObject:[self.collation sortedArrayFromArray:section collationStringSelector:selector]];
    
    return sections;

【参考方案1】：

这就是我最终做的事情

-(NSArray *)partitionObjects:(NSArray *)array collationStringSelector:(SEL)selector

    self.collation = [UILocalizedIndexedCollation currentCollation];
    NSInteger sectionCount = [[self.collation sectionTitles] count];//section count is take from sectionTitles and not sectionIndexTitles
    NSMutableArray *unsortedSections = [NSMutableArray arrayWithCapacity:sectionCount];

    //create an array to hold the data for each section
    for(int i = 0; i < sectionCount; i++)
    
        [unsortedSections addObject:[NSMutableArray array]];
    

    if ([self.catString isEqualToString:ARTISTS])
    
        //put each object into a section
        for (id object in array)
        
            if (!object)
            
                continue;
            
            NSInteger index = [self.collation sectionForObject:object collationStringSelector:selector];
            [[unsortedSections objectAtIndex:index] addObject:object];
        
    
    else
    
        NSInteger index;
        for (id object in array)
        
            Song *songItem = object;
            NSString* charIndex;

            if([songItem.songName length]<=2)
            
                charIndex = [songItem.songName substringToIndex:1];
            
            else if([songItem.songName length]<=3)
            
                charIndex = [songItem.songName substringToIndex:2];
            
            else if([songItem.songName length]<=4)
            
                charIndex = [songItem.songName substringToIndex:3];
            
            else if([songItem.songName length]>=5)
            
                charIndex = [songItem.songName substringToIndex:4];
            
            NSRegularExpression *regex = [[NSRegularExpression alloc]
                                           initWithPattern:@"[a-zA-Z]" options:0 error:NULL];
            NSUInteger matches = [regex numberOfMatchesInString:charIndex options:0
                                                          range:NSMakeRange(0, [charIndex length])];
            if (matches >=2)
            
                index = [self.collation sectionForObject:object collationStringSelector:selector];
                [[unsortedSections objectAtIndex:index] addObject:object];
            
            else
            
                index = 26; //add object to last index "#"
                [[unsortedSections objectAtIndex:index] addObject:object];
            
            songItem = nil;
        
    
    NSMutableArray *sections = [NSMutableArray arrayWithCapacity:sectionCount];

    //sort each section
    for (NSMutableArray *section in unsortedSections)
    
        [sections addObject:[self.collation sortedArrayFromArray:section collationStringSelector:selector]];
    
    return sections;

【讨论】：

我想我的问题是你为什么要使用 UILocalizedIndexedCollat​​ion。

用于索引，但我希望将汉字排序为“#”

"为了索引" 但是你自己做所有的索引。您的数据未本地化。它只是英文字母加上关于中文的规则。你是在战斗 UILocalizedIndexedCollat​​ion，而不是使用它。如果 UILocalizedIndexedCollat​​ion 根本不在故事中，你会过得更轻松。

以下是如何使用 A-Z 部分构建您自己的基于部分的表视图模型数据：github.com/mattneub/Programming-ios-Book-Examples/blob/master/… 如果您只调整 for 循环中显示的 @987654324，您将拥有更简单的时间@实现添加中文标题处理。

@matt UILocalizedIndexedCollat​​ion 工作正常，但我很难像 iPod 那样进行排序。对于非 A-Z 到“#”，我最初执行了您之前提到的 for 循环的方法...