iphone - 如何按升序或降序对对象的 NSMutableArray 进行排序

Question

我使用这段代码创建了一个对象的 NSMutableArray

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSArray * ary1 = [NSArray arrayWithObjects:@"01/07",@"02/07",@"03/07",@"04/07",@"05/07",@"06/07",@"07/07", nil];
        NSArray * ary2 = [NSArray arrayWithObjects:@"First",@"Second",@"Third",@"Forth",@"Fifth",@"Sixth",@"Seventh", nil];
        NSArray * ary3 = [NSArray arrayWithObjects:@"1000",@"2000",@"3000",@"4000",@"5000",@"6000",@"7000", nil];

tableAry = [[NSMutableArray alloc] init];
        for (int i=0; i<ary1.count; i++) {
            //cardSummry will hold the data and give back the model to store in array and we can find that value using model
            DataModel *dataModel = [[DataModel alloc] init];
            dataModel.date = [ary1 objectAtIndex:i];
            dataModel.name = [ary2 objectAtIndex:i];
            dataModel.ammount = [ary3 objectAtIndex:i];

            [tableAry addObject:dataModel];
        }
}

这是我的数据模型类

.H文件

#import <Foundation/Foundation.h>

@interface DataModel : NSObject

//this variable is used to get the data from array
@property (nonatomic,strong) NSString *date;
@property (nonatomic,strong) NSString *name;
@property (nonatomic,strong) NSString *ammount;

//this method will genarate a data model which will be added to array for future use
+ (id)cardSummary:(NSString*)date name:(NSString*)name ammount:(NSString*)ammount;
@end

.M文件

#import "DataModel.h"

@implementation DataModel

@synthesize date,name,ammount;

//this method will genarate a data model which will be added to array for future use
+ (id)cardSummary:(NSString*)date name:(NSString*)name ammount:(NSString*)ammount
{
    DataModel *dataModel = [[self alloc] init];

    [dataModel setDate:date];
    [dataModel setAmmount:ammount];
    [dataModel setName:name];

    return dataModel;
}

@end

现在我想根据我看到的数组中的名称对其进行排序 this SO 中的问题看起来像我的，并使用它的答案代码来解决我的问题，但它对我不起作用，这是

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

    NSLog(@"tableAry : %@",tableAry);

那么我怎样才能对我的数组进行排序

更新

正如@Martin R 和@Rick 所说，我已经分配了我的数组，但现在我遇到了这个错误。

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[DataModel caseInsensitiveCompare:]: unrecognized selector sent to instance 0x7550850'

Answer 1

您还可以使用 NSSortDescriptor。

NSSortDescriptor* sortDes = [[NSSortDescriptor alloc] initWithKey:@"your key" ascending:YES];
[_array sortUsingDescriptors:[NSArray arrayWithObject:sortDes]];

试一试。