NSMutableArray复杂对象排序

1、   说明：以下程序中NSMutableArray数组中包含的对象是NSDictionary，而下面要实现的排序就是根据NSDictionary中的key代表的value进行比较而排序，如下：

code

//1.对字段的封装 - (NSDictionary *)formateDicWithName:(NSString *)name                               value:(NSNumber *)value                               color:(UIColor *)color {     return [NSDictionary dictionaryWithObjectsAndKeys:             name,@"name",             value,@"value",             color,@"color",nil]; }

//2.准备数据     NSMutableArray *result = [NSMutableArray arrayWithCapacity:0];     NSDictionary *deptBal =     [self formateDicWithName:@"储蓄余额"                        value: [NSNumber numberWithFloat:30]                        color:[UIColor redColor]];     [result addObject:deptBal];         NSDictionary *finBal =     [self formateDicWithName:@"理财产品余额"                        value: [NSNumber numberWithFloat:20]                        color: [UIColor yellowColor]];     [result addObject:finBal];         NSDictionary *debtBal =     [self formateDicWithName:@"国债余额"                        value: [NSNumber numberWithFloat:40]                        color: [UIColor blueColor]];     [result addObject:debtBal];         NSDictionary *fundBal =     [self formateDicWithName:@"基金市值"                        value: [NSNumber numberWithFloat:10]                        color: [UIColor blackColor]];     [result addObject:fundBal];

//3.实现排序 NSArray *newResult =         [result sortedArrayUsingComparator:^(id obj1,id obj2)         {             NSDictionary *dic1 = (NSDictionary *)obj1;             NSDictionary *dic2 = (NSDictionary *)obj2;             NSNumber *num1 = (NSNumber *)[dic1 objectForKey:@"value"];             NSNumber *num2 = (NSNumber *)[dic2 objectForKey:@"value"];             if ([num1 floatValue] > [num2 floatValue])             {                 return (NSComparisonResult)NSOrderedAscending;             }             else             {                 return (NSComparisonResult)NSOrderedDescending;             }             return (NSComparisonResult)NSOrderedSame;         }];

经过1、2、3三个操作得到的数组newResult，就是根字典NSDictionary中的value所代表的值进行由大到小排序的数组。