字典数组排序 取前n条数据

因要对NSDictionary数组排序，且取前n条，整理一下代码

 NSMutableArray *myMutableArr = [[NSMutableArray alloc] init] ;

 NSDictionary *dicOne = @{@"number":@"1",@"pid":@"2"};

 NSDictionary *dicTWo = @{@"number":@"6",@"pid":@"5"};

 NSDictionary *dicThree =@{@"number":@"3",@"pid":@"1"};

 NSDictionary *dicFour = @{@"number":@"4",@"pid":@"3"};

 [myMutableArr addObjectsFromArray:@[dicOne,dicTWo,dicThree,dicFour]];

对number字段排序并取出前2条数据测试

 NSArray *sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"number" ascending:NO]];

 [myMutableArr sortUsingDescriptors:sortDescriptors];

//排序后取数组前2条

NSLog(@"排序后的数组%@",[myMutableArr subarrayWithRange:NSMakeRange(0,2)]);