对NSMutableArray中的NSDictionary对象自定义排序

引用:http://www.i-alive.com/post/149/

写一个 category 给类NSDictonary添加一个新的compare方法:

 

1 #import <Foundation/Foundation.h>
2 
3 @interface NSDictionary (NSDictionaryHelper)
4 
5 //对NSMutableArray中的NSDictionary对象自定义排序
6 - (NSComparisonResult)compareScore:(NSDictionary*)otherObject;
7 
8 @end
 1 #import "NSDictionary+NSDictionaryHelper.h"
 2 
 3 @implementation NSDictionary (NSDictionaryHelper)
 4 
 5 - (NSComparisonResult)compareScore:(NSDictionary*)otherObject {
 6     //对第一个对象排序,也可以是其他对象
 7     return [[[otherObject allValues] objectAtIndex:0]
 8             compare:[[self allValues] objectAtIndex:0]];
 9 }
10 
11 @end

在代码中调用这个方法

1 #import "NSDictionary+NSDictionaryHelper.h"
2 ..........
3 //进行排序
4 studentArray = [NSMutableArray arrayWithArray: 
5                    [studentArray sortedArrayUsingSelector:@selector(compareScore:)]];

 

posted on 2014-05-16 10:52  zcz1513  阅读(364)  评论(0)  编辑  收藏  举报

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