如何按字母顺序对 NSMutable 数组中的自定义对象字段进行排序？

Question

我有一个自定义对象，例如：

#import <Foundation/Foundation.h>

@interface Store : NSObject{
    NSString *name;
    NSString *address;
}

@property (nonatomic, retain) NSString *name;
@property (nonatomic, retain) NSString *address;

@end

我有一个包含 Store 对象的 NSMutableArray (storeArray) 数组：

store1 = [[Store alloc] init];
store1.name = @"Walmart";    
store1.address = @"walmart address here..";

store2 = [[Store alloc] init];
store2.name = @"Target";
store2.address = @"Target address here..";

store3 = [[Store alloc] init];
store3.name = @"Apple Store";
store3.address = @"Apple store address here..";

//add stores to array
storeArray = [[NSMutableArray alloc] init];
[storeArray addObject:store1];
[storeArray addObject:store2];
[storeArray addObject:store3];

我的问题是如何按商店名称对数组进行排序？我知道我可以使用以下行按字母顺序对数组进行排序：

[nameOfArray sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];

How can I apply this to the store name of my Store class?

Answer 1

NSSortDescriptor *sortDescriptor =
    [NSSortDescriptor sortDescriptorWithKey:@"name"
                                  ascending:YES
                                   selector:@selector(caseInsensitiveCompare:)];
[nameOfArray sortedArrayUsingDescriptors:@[sortDescriptor]];

相关文档：

• [NSArray SortedArrayUsingDescriptors:]
• NSSortDescriptor

Answer 2

Regexident 的回答 基于 NSArrays，NSMutableArray 相应的就地排序将是 -sortUsingDescriptors:

[storeArray sortUsingDescriptors:
                    [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"name" 
                                                                           ascending:YES 
                                                                            selector:@selector(caseInsensitiveCompare:)]]];

现在storeArray 本身将被排序。