iOS Slow TableView with Custom Cells

[donaghy]

Hi all,

I've created a data entry form using a table view with custom cells. My custom cells are simple cells that contain a label and a textfield or textview. Though i find my table is very slow and "sticky" when scrolling. Is this typical or is there a better working solution for something like this?

Thanks.

 

[Sykte]

Code will help. Are you using DequeueReusableCell? What do you mean by custom cells, this could mean many things.

 

[PhoneyDeveloper]

Some reasons are

images in the cells, especially loaded from a remote source,
loading data from a database, slowly
loading the cells from nibs,
other complicated drawing in the cells,
use of UITextViews in your cells
variable height rows
creating a new cell every time

 

[dejo]

Some reasons are

images in the cells, especially loaded from a remote source,
loading data from a database, slowly
loading the cells from nibs,
other complicated drawing in the cells,
use of UITextViews in your cells
variable height rows
creating a new cell every time

Don't forget non-opaque subviews!

 

[PhoneyDeveloper]

Right, I think using clearColor as the background color is supposed to slow things down too.

 

[donaghy]

Ok i am loading cells from nibs and using textfields and textviews. I'll try creating the cells programmatically and see if that has any improvement.

 

[bredell]

The most important thing is to reuse your table cells. If you have complex cells with lots of info it's probably a good idea to create a custom UIView subclass and do all the drawing yourself.

The WWDC videos have a session on how to improve your table view performance.

 

[mmcc]

Does anyone have a pointer to a good reference (or WWDC video) of how to use InterfaceBuilder with UITableView?

It seems I can do very little to create/format cells in a UITableView via IB. I was hoping for more visual control in this area as iOS matures. There is a UITableCell visual item in IB, but I can't find much info on how to use it. It seems all the Apple examples create all sections/cells in code rather than visually in IB. I am so sick of that default list that is displayed in IB (California, etc.)!

Thanks