Question

我已经花了几个小时在这上面，并且无法弄清楚为什么我的UITableViewCells全部闪烁/闪烁（我可以解释它的唯一方法）：

我的所有帖子都已加载
我刷新并从数组中删除所有对象并加载第一页刷新结果
我向下滚动到第一页的末尾，然后将第二页添加到我的数组中。
我所有的后期闪光/改变位置，然后恢复正常（它真的很快，但看起来很糟糕）

只有当所有帖子都被加载然后我刷新并且它不会发生在第3 +页，只发生在第2页时，才会发生这种情况。

这是我的代码：

- (void)setup
{

    nearbyArray = [[NSMutableArray alloc]init];
    nearbyCellHeight = [[NSMutableArray alloc]init];

    isLoadingMorePosts = YES;
    didLoadAllNearbyObjects = NO;
    isRefreshing = NO;

    totalNearbyObjects = 0;
    querySkip = 0;


    [self query];
}



- (void)refreshControlValueChanged:(UIRefreshControl *)refresh 
{
    NSLog(@"refreshing");

    if (!isRefreshing){
        didLoadAllNearbyObjects = NO;
        isRefreshing = YES;
        querySkip = 0;
        totalNearbyObjects = 0;
        refreshControl = refresh;
        [self query];

    }
}


- (void)query 
{

    NSLog(@"loading");

    int querylimit = 25;
    PFQuery *placeQuery = [PFQuery queryWithClassName:@"places"];

    if (querySkip > 0) {
        [placeQuery setSkip: querylimit * querySkip];
    }

    [placeQuery setLimit:querylimit];
    [placeQuery whereKey:@"location" nearGeoPoint:[PFGeoPoint geoPointWithLatitude:[LocationController sharedSingleton].locationManager.location.coordinate.latitude longitude:[LocationController sharedSingleton].locationManager.location.coordinate.longitude] withinMiles:
     200];

    [placeQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error){
            [self handleQuery:objects];
        }
        else{
            NSLog(@"Error: %@", error);
            isLoadingMorePosts = NO;
        }
    }];
}


- (void)handleQuery:(NSArray *)objects
{
    if (isRefreshing){
        [nearbyArray removeAllObjects];
        [nearbyCellHeight removeAllObjects];
        isRefreshing = NO;
    }

    [nearbyArray addObjectsFromArray:objects];


    //determine if all objects are already loaded
    if (totalNearbyObjects != nearbyArray.count)
        totalNearbyObjects = nearbyArray.count;
    else
        didLoadAllNearbyObjects = YES;

    isLoadingMorePosts = NO;
    [tableView reloadData];
    refreshControl.endRefreshing;
}


-(void)scrollViewDidScroll:(UIScrollView *)scrollView 
{
    if (scrollView.contentSize.height - scrollView.contentOffset.y < (self.view.bounds.size.height)) {
        if (!isLoadingMorePosts) {
            if (didLoadAllNearbyObjects == NO){
                isLoadingMorePosts = YES;
                querySkip++;
                [self query];
            }
        }
    }
}

UITableViewCells在某些情况下会快速闪烁

0 个答案: