Question

我尝试在imageview中加载动态图像，在标签中加载文本，它在模拟器和ios设备中都能正常工作。（见下面的代码）

  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
      {
          ImageCell  *cell = (ImageCell *)[self.TestTable dequeueReusableCellWithIdentifier:@"ImageCell"];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        if (cell == nil) {
            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"ImageCell" owner:self options:nil];
            cell = [topLevelObjects objectAtIndex:0];
        }
    }
    else
    {
        if (cell == nil)
        {

            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"ImageCell" owner:self options:nil];
            cell = [topLevelObjects objectAtIndex:0];
        }
    }

cell.textlabels.text=@"Cable and Hose Carriers";

cell.ProductsImages.image = [UIImage imageNamed:@"cool.jpg"];



return cell;
}

但是如果我试图在自定义tableview单元格中加载uitextview中的数据，则tableview不能在ios设备中平滑滚动（口吃），但在模拟器中工作正常。请建议我做得更好。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
      {
          ImageCell  *cell = (ImageCell *)[self.TestTable dequeueReusableCellWithIdentifier:@"ImageCell"];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        if (cell == nil) {
            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"ImageCell" owner:self options:nil];
            cell = [topLevelObjects objectAtIndex:0];
        }
    }
    else
    {
        if (cell == nil)
        {

            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"ImageCell" owner:self options:nil];
            cell = [topLevelObjects objectAtIndex:0];
        }
    }
cell.ProductsDetailsTextView.delegate = self;
cell.ProductsDetailsTextView.text=[Descriptions objectAtIndex:indexpath.row];

return cell;
}

Answer 1

你正试图在主线程上做所有事情。您的主线程由于动态加载数据而开始阻塞，这就是为什么tableview不能平滑滚动。尝试在不同的队列中编写代码

// call background queue for dynamic loading of data
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{


   // load your dynamic data here

    // call main queue here
    dispatch_async(dispatch_get_main_queue(), ^{
     // after loading data in background. use your downloaded data here.  
    });
});

多数民众赞成。

使用UITextview的自定义UITableView在ios设备中不能平滑滚动

1 个答案: