Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>What I've done is to use NSCache. I've created a small class with properties that conforms to the NSCache data protocol (its really easy to do). So what I do is create a relationship between each cell in the main table and various things worth caching: NSAttributed strings, images etc - really anything that takes work to create. I don't preload it but you could.</p> <p>When you are asked to provide a cell by the tableview, look in your cache for your primary object. If there, pull all all the objects you need. If the cache does not have the object, then get the data the old fashion way, but before you finish, save it in the cache too.</p> <p>This really helped me reduce "stutter" when scrolling the cell. Also, do NOT animate anything in the cell - that kills performance. Everything should be fully rendered.</p> <p>Another thing to remember - make sure ever view which can be set to opaque has its property set to YES. That for sure helps the system render the cell (including the backgound view if you use one.)</p> <p>EDIT:</p> <p>So you provided information that included UITableViews may the root problem. So two suggestions:</p> <p>1) Can you step back and figure out how to make the scrollView a single UITableView? With table headers and footers, and section headers and footers, and even the ability to essentially make a cell a floating view, can't you figure out how to rearchitect what you have?</p> <p>2) So you decide no to suggestion 1. Then, do this. Think of the space used by the tableview as being a container view. Whenever the tableview is edited, take an image snapshot of it and keep this image around. As soon as the user starts to scroll, swap the tableViews out for the images. When the scrollView stops swap the UITableView back in. This of course will take some fine tuning. In fact, you could probably overlay an opaque image snapshot over the table (which will hide it and prevent it from being asked to draw itself) during scrolling.</p>
    singulars
    1. This table or related slice is empty.
    1. POWhat is an acceptable FPS for scrolling, and what are tips for improving performance?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDavid H
    1. USDavid H
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI do have some aspect of caching in place for the cells, but it didn't help. I have uploaded a sample project in my original post that clearly shows the problem I have. I you don't mind and have some time to look at it, it's greatly appreciated
      singulars
      1. PO
      1. USxonegirlz
    2. COWell, have commitments Sunday but would be glad to take a peek on Monday
      singulars
      1. PO
      1. USDavid H
    3. COSure.. I'd appreciate that too
      singulars
      1. PO
      1. USxonegirlz
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload