I do not want animation in the begin updates, end updates block for uitableview?
Objective CUitableviewObjective C Problem Overview
I have a UITableView that is using a custom table cell and each cell has a UIWebView.
Because UIWebView took along time to load, i want to avoid reloading them at all cost. In some situations, I have all cells loaded, but their heights are messed up. Therefore, I need to "relayout" the table without triggering the "cellForRow" function.
- I definitely cannot use reloadData... as it will reload the cells again.
- I tried tableView.setNeedDisplay, setNeedsLayout etc, none of them is able to rearrange the table cells
- The only way it worked, is to call beginupdates/endupdates block, this block is able to relayout my table without firing cellForRow! BUT, I didnt want the animation! This block produces an animation effect but i do not want it...
How can I solve my problem?
Objective C Solutions
Solution 1 - Objective C
[UIView setAnimationsEnabled:NO];
[tableView beginUpdates];
[tableView endUpdates];
[UIView setAnimationsEnabled:YES];
Solution 2 - Objective C
One more way to do it using blocks
Obj-C
[UIView performWithoutAnimation:^{
[self.tableView beginUpdates];
[self.tableView endUpdates];
}];
Swift
UIView.performWithoutAnimation {
tableView.beginUpdates()
tableView.endUpdates()
}
Solution 3 - Objective C
working on my project, but not a common solution.
let loc = tableView.contentOffset
UIView.performWithoutAnimation {
tableView.reloadData()
tableView.layoutIfNeeded()
tableView.beginUpdates()
tableView.endUpdates()
tableView.layer.removeAllAnimations()
}
tableView.setContentOffset(loc, animated: true)//animation true may perform better
Solution 4 - Objective C
Swifties I had to do the following for this to work:
// Sadly, this is not as simple as calling:
// UIView.setAnimationsEnabled(false)
// self.tableView.beginUpdates()
// self.tableView.endUpdates()
// UIView.setAnimationsEnabled(true)
// We need to disable the animations.
UIView.setAnimationsEnabled(false)
CATransaction.begin()
// And we also need to set the completion block,
CATransaction.setCompletionBlock { () -> Void in
// of the animation.
UIView.setAnimationsEnabled(true)
}
// Call the stuff we need to.
self.tableView.beginUpdates()
self.tableView.endUpdates()
// Commit the animation.
CATransaction.commit()
Solution 5 - Objective C
I prefer to have a smooth transition:
CGPoint offset = self.tableView.contentOffset;
[UIView transitionWithView:self.tableView duration:0.5 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
[self.tableView reloadData];
self.tableView.contentOffset = offset;
} completion:nil];
give it a try.
Solution 6 - Objective C
I wanted to updated the cell height for section 5 and following code worked for me:
UiView.setAnimationsEnabled(False)
self.productTableView.reloadSections(NSIndexSet(index: SectionType.ProductDescription.hashValue), withRowAnimation: UITableViewRowAnimation.None)
self.productTableView.scrollToRowAtIndexPath(NSIndexPath(forRow: 0, inSection: 5), atScrollPosition: UITableViewScrollPosition.Bottom, animated: false)
UIView.setAnimationsEnabled(true)
Solution 7 - Objective C
for OBJ-C
[UIView setAnimationsEnabled:NO];
[tableView beginUpdates];
[tableView endUpdates];
[UIView setAnimationsEnabled:YES];
for swift
UIView.setAnimationsEnabled(false)
tableView.beginUpdates()
tableView.endUpdates()
UIView.setAnimationsEnabled(true)
Solution 8 - Objective C
In my case worked this:
func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
tableView.beginUpdates()
tableView.endUpdates()
return true
}
func textViewDidChange(_ textView: UITextView) {
DispatchQueue.main.async {
self.tableView.beginUpdates()
self.tableView.endUpdates()
}
}