对NSMutableArray中的NSDictionary对象自定义排序

#import <Foundation/Foundation.h>

@interface NSDictionary (NSDictionaryHelper)

//对NSMutableArray中的NSDictionary对象自定义排序
- (NSComparisonResult)compareScore:(NSDictionary*)otherObject;

@end

#import "NSDictionary+NSDictionaryHelper.h"

@implementation NSDictionary (NSDictionaryHelper)

- (NSComparisonResult)compareScore:(NSDictionary*)otherObject {
//对第一个对象排序,也可以是其他对象
return [[[otherObject allValues] objectAtIndex:0]
compare:[[self allValues] objectAtIndex:0]];
}

@end

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