poor performance of scrollview inside tableview ios - ios

Question

I have trouble with table view and its response because every cell has scrollView with 72 labels in it. I know that scrollView needs to load all elements first, and than load on screen, and because of that table view is slow, but is there a way maybe not to allocate and call initWithFrame method every time I create label? I tried to reuse label with different frame, but it is not working.
Here is code I need to optimize somehow to create labels faster.
int listSize = 36;
for(int i=0;i<listSize;i++){
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0+i*200, 0, 200, 80)];
label.text = #"HELLO";
label.textColor = [UIColor blackColor];
label.backgroundColor = [UIColor clearColor];
label.textAlignment = NSTextAlignmentCenter;
label.font = [UIFont fontWithName:#"ArialMT" size:18];
[scrolView addSubview:label];
UILabel *grayBorderInFront = [[UILabel alloc] initWithFrame:CGRectMake(2+i*200, 5, 1, scrolView.frame.size.height-10)];
grayBorderInFront.text = #"";
grayBorderInFront.backgroundColor = [UIColor lightGrayColor];
[scrolView addSubview:grayBorderInFront];
}

Answer 1

You can always have one TableView and eachCell has a horizontal CollectionView.
Set the scroll direction property to horizontal and use the UIViewCollectionFlowLayout
The CollectionView will guarantee that your labels (that are cells) are being reused and that you are doing an efficient job.

Answer 2

Few weeks ago I implemented EPG layout for iPhone app using collectionView with custom layout.
On the iPad app other developer implemented the EPG with scrollView with array of collectionView flow layout.
The custom layout work mach better.
You mentioned that you need iOS 5 hence you can try the following open source replacement to collection view:
https://github.com/steipete/PSTCollectionView

Answer 3

Save your labels in an array and then add them just to the view. Or you could even cache the whole scrollview.
Edit:
You keep a list of values that are updating. For all the labels created in the scrollview you set a tag label1.tag = 4; (starting from 1 instead of zero because 0 is the default one and other views have it as well).
Then, in your cellForViewAtIndexPath instead of creating a new label every time, you get the labels with [cell viewWithTag:] and you get a reference of the label. The only thing you have to do is to change the value of the label. You can also use the tag as index in the array:
int index = 3; // third label
[(UILabel*)[cell viewWithTag:index+1] setText:[myLabelsArray objectAtIndex:index]];