UICollectionView + AFNetWorking 异步加载,局部刷新.

最近在做的项目需要cell里面的数据需要和后台实时交互。而collectionview reload会整体刷新。

//m层 发送通知
[[NSNotificationCenter defaultCenter]postNotificationName:@"CartProUpdate" object:self userInfo:par];
 
//c层 
 
//注册通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(UpdateForCells:) name:@"CartProUpdate" object:nil];
 
//收到通知后，更新cell
-(void)UpdateForCells:(NSNotification*)Notification
 
{
 
    NSLog(@"updateCell:%@",Notification.userInfo);
    //对比需要更新的cell，并更新CartInfo里的数据
    for (int i = ; i< [CartInfo count]; i++) {
 
        if ([[CartInfo objectAtIndex:i][@"sysnumber"] isEqualToString:Notification.userInfo[@"sysnumber"]]) {
 
            if (Notification.userInfo[@"ifbuy"] == nil) {
 
                [[CartInfo objectAtIndex:i] setValue:[NSString stringWithFormat:@"%@",Notification.userInfo[@"num"]] forKey:@"quantity"];
 
            }else{
 
                [[CartInfo objectAtIndex:i] setValue:[NSString stringWithFormat:@"%@",Notification.userInfo[@"ifbuy"]] forKey:@"ifBuy"];
 
            }
 
            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:];
 
           NSMutableArray *indexPaths = [[NSMutableArray alloc] init];
 
            [indexPaths addObject:indexPath];
 
            //更新cell
            [CartCollectionView reloadItemsAtIndexPaths:indexPaths];
 
        }
 
    }
 
}

https://github.com/KayCm/CellUpdate 写的可能不是很好,还请见谅.