像 iPhone 上的地址簿排序一样对 NSString 的 NSArray 进行排序

我有一个字符串数组（名称）

我想像 iPhone 上的地址簿对它们进行排序一样对它们进行排序

• 例如：éli -> E 下
• 例如：àli -> A 下
• 例如：4li -> 在 # 下

有什么建议么？

您需要对字符串执行不区分变音符号的比较。NSString has a compare:options:方法有一个选项NSDiacriticInsensitiveSearch.

NSArray *array = [NSArray arrayWithObjects:@"éli", @"bob", @"earl", @"allen", @"àli", @"aaron", nil];

NSArray *sorted = [array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
    return [(NSString*)obj1 compare:obj2 options:NSDiacriticInsensitiveSearch|NSCaseInsensitiveSearch];
}];

Edit:

这是一个完整的示例，它将根据第一个字符变音符号不敏感来划分结果。我放入了一本字典，因此您需要自己跟踪排序的键才能正确显示。

NSArray *array = [NSArray arrayWithObjects:@"éli", @"bob", @"earl", @"allen", @"àli", nil];

NSArray *sorted = [array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
    return [(NSString*)obj1 compare:obj2 options:NSDiacriticInsensitiveSearch|NSCaseInsensitiveSearch];
}];

NSMutableDictionary *sectioned = [NSMutableDictionary dictionary];
NSString *firstChar = nil;

for(NSString *str in sorted)
{
    //Ignore empty strings
    if(![str length])continue;

    NSMutableArray *names = nil;

    //Compare the first character using diacritic insensitive search
    if([str compare:firstChar options:NSDiacriticInsensitiveSearch|NSCaseInsensitiveSearch range:NSMakeRange(0, 1)] == NSOrderedSame)
    {
        names = [sectioned objectForKey:firstChar];
    }
    else
    {
        //decomposedStringWithCanonicalMapping is where the magic happens
        //(it removes the accent mark)
        firstChar = [[str decomposedStringWithCanonicalMapping] substringToIndex:1];
        names = [NSMutableArray array];
        [sectioned setObject:names forKey:firstChar];
    }

    [names addObject:str];
}

NSLog(@"sorted: %@", sorted);
//This is sectioned like the address app
NSLog(@"sectioned: %@", sectioned);