After returning from a detail controller. I call scrollToRowAtIndexPath and it works as expected returning me to the row. If i continue to scroll down the tableview everything is fine, but scrolling up is extremely choppy no matter how slowly i scroll. No images just text. Is there any way to improve on this? All cells are the same and use the same identifier.
Related
This video demonstrates the issue I am having
UITableView screen lag
I am loading a xib file with a fair bit of stackView and UIViews into my tableview cell. Each cell takes up about 80% of the screen so you would see two cells at max.
I am experiencing a small lag when I am scrolling to the third cell. If I scroll back up again and scroll down like what I did, the lag does not appear to be there anymore and the tableView scrolls smoothly for the remaining cell. If I reload the table and repeat the above step, I will get that lag again when third cell is just about to appear.
It "feels" like the program takes longer to load the xib file in cellForRowAtIndexPath for the very first time. And once it is loaded, it could be loaded nice and fast for any other cell. (That is just a feel though)
All my views have static data. I am finding that this small lag decrease as I removed more view from the xib file.
Is this pattern normal?
Note. In the video when I pull to refresh, the table is reloaded. I have reloaded the table just before the video starts. You will see that at the beginning and whenever third cell is just about to appear (or half way through scrolling second cell) there is a small jump in the table. And after that, everything scrolls butter smooth.
Xib file
XibFile screen shot
I'm building a chat interface. I'm using multiple types of tableView cells in UITableView. Table view cells are start flickering when new cell is added into tableView from reusablecell. I'm dequeuing tableview cells with following piece of code. How get scrolling smooth with out any flickering.
tableView.dequeueReusableCellWithIdentifier("MessageLessonTableViewCell") as! MessageLessonTableViewCell
The main reason for flickering is that, tableView is getting data to be attached late in time. So when you scroll, it takes time to switch from one type of tableViewCell to another. Plus you might be doing DB operations in cellForRowAtIndexPath which delays in returning tbaleViewCell. For implementing Smooth scrolling refer this
I'm puzzled with this.
I have a UIScrollView and inside I have placed 4 tableViews.
The whole thing is used to allow scrolling horizontally and switching tableViews like the Groupon app.
As soon as you start scrolling the 4th (left or right) tableView, is moved in the scrollView and a reloadData is initiated on that tableView, so it will load the data from the datasource for that category.
However, when I scroll into that tableView, it still has the data from the previous category, meaning the cell's didn't get refreshed.
Can anyone shed a light on why this is happening?
I'm guessing only that because the tableView is not in a visible frame when I call the reloadData command, actual drawing is not happening in the tableView (the datasource methods are being called normally, but no drawing is happening).
Any ideas, or tips ?
Using [myTableView selectRowAtIndexPath:...] to scroll to a certain table view scrolls the view too quickly to be seen as a scrolling motion, even with passing animated:YES. Setting tableView.decelerationRate doesn't seem to change the speed at which it scrolls.
Is there a way to slow down the scrolling without writing a custom animation? If so, is there a way to make sure that the scrolling has finished before calling another action? I want to call didSelectRowAtIndexPath after it scrolls, but not until it has finished scrolling.
There are about 100 cells displayed in UITableView. So , when I scroll down or up too fast I see a flicker effect over UITableView.
I have also re-used the cells and I am not using reloadData in my code, but still I see flicker effect.
The content that I am displaying in each cell is only text.
I have also gone through this thread but did not found useful UITableView section headers are blank and flickering.
I think with a number of cells I noticed my old iphone 3g struggle every now and then when i was flicking for a quick scroll to the bottom.