I got an app with one table. First cell is the coverflow from iCarousel.
When i rotate coverflow and items changed i reload table view:
-(void)carouselDidScroll:(iCarousel *)_carousel{
if (curCategory != _carousel.currentItemIndex)
{
curCategory=(int)_carousel.currentItemIndex;
NSLog(#"%i",curCategory);
[table reloadData];
}
}
But this code drop finger action of rotating. Because first cell with coverflow reload too.
Can i reload table, but dont touch first cell?
You can reload just a range of cells using reloadRowsAtIndexPaths:
It might make more sense to make the carousel be the table header view instead of the first cell though.
Related
I have used this tutorial to put a collectionView inside a UITableView. https://ashfurrow.com/blog/putting-a-uicollectionview-in-a-uitableviewcell-in-swift/
The UITableViewController is the dataSource & delegate for both the UITableView & the different collection views in each cell.
The problem is that I want to dynamically hide the CollectionView and to change its height to 0 whenever the collectionview is empty.
To do so, I have this code in CellForRowAtIndexPath
if (patients.paraclinicImage.count == 0){
[cell.collectionView setHidden:true];
cell.collectionViewHeight.constant = 0;
} else {
[cell.collectionView setHidden:false];
cell.collectionViewHeight.constant = 80;
}
By having this code, the collectionView shows up correctly initially. However, when scrolling fast, I will sometime have the cell load with the correct cell height, however the collection view will be empty. Refreshing the cell fixes this issue. Removing the above line of codes also fixes the issue.
Here are two images showing how the cell looks when first rendered, and after multiple scrollings (and re-renderings of the cell).
Before scrolling issue looks like below image
But After scrolling issue seems to like below one
I would appreciate any ideas you guys might have.
Debug view hierarchy showing an empty collectionView with an appropriate cell height
It is because your cell height is not updated on fast scrolling. UITableView caches the row height of indexPath just to calculate the scroll area. You need to set constraints properly and adjust the height of cell in heightForRowAtIndexPath: method.
Apply the logic inside heightForRowAtIndexPath: and your problem will be solved.
Happy Coding!!
I had the same issue. Sometimes, my collection view inside a tableviewcell wouldn't show the collectionview cells. I solved it by calling collectionView reload on main thread. I don't exactly know the reason, as I have many background calls on each cell and was reloading the tableview on main thread itself. Still, had to reload collectionview on main thread.
DispatchQueue.main.async {
cell.colViewProperties.reloadData()
}
I need to show a tableview within a cell of a tableView. I have a separate dictionary for tableview that is residing inside each cell of tableView. Where i need to assign the dictionary values to the tableview that is inside the cell
Add the tableView as a subview to the cell. Next assign a delegate/datasource to the tableview. This can be the same object as the outer tableViews datasource/delegate. Every time a delegate method is called, the tableView is send along as a parameter and you can simply do (assuming you have properties for both tableViews):
if (tableView == self.outerTableView){
// ... do stuff for outer tableView
} else if (tableView == self.innerTableView) {
// ... do stuff for inner tableVIew
}
I am assuming here that you have only one cell with one tableView in it. If you have more cells with a tableView in it, the idea can stay the same, except that with many cells with tableViews there is surely a better place to handle the tableViewCallbacks than in the viewController of the outer tableView.
I have a UITableView of cells where one cell contains a UITableView. Selecting that row that contains the table pushes a new view onto the screen with a list of items. The user selects a list of items and then presses 'back' to pop that view. The parent view looks at the number of items selected and the height of the cell is supposed to adjust to show all items selected.
What happens is that when the view is reshown, the listed items extends into the cell below. If I scroll that cell off the screen, then back to it, the cell is then the right height showing all items correctly.
I've tried several things such as putting code into viewWillAppear of the main table like [self.view setNeedsDisplay] and [self.view setNeedsLayout], but it doesn't work.
I can't seem to find a way to make that cell redraw to it's right size without scrolling the table once the view appears.
Is there some other method to force the redraw before it actually appears?
try:
NSIndexPath *theIndexPath = [NSIndexPath indexPathForRow:cellRow inSection:cellSection];
NSArray *theIndexPaths = [NSArray arrayWithObject:theIndexPath];
[table reloadRowsAtIndexPaths:theIndexPaths withRowAnimation:NO];
What are you currently using to redraw the cell? Just waiting for it to redraw itself when it goes off screen and back on? Or are you using something like [table reloadData];?
I'd like to launch my "add item" form in response to touching an empty cell (the next blank cell), sort of like the stock "Reminders" app. didSelectRowAtIndexPath doesn't work for this and I don't have a clue what does.
Thanks
add a button to the tableFooterView
https://developer.apple.com/library/IOs/#documentation/UIKit/Reference/UITableView_Class/Reference/Reference.html
You could add a tap gesture recognizer to the table view, but be sure to test if the user tapped a table view cell or not.
If you wanna the last cell of your table view to be an add button so that you can add a cell directly without putting the table view in edit mode, then here is what you can do:
For the array you use to populate the table view, always make sure the last cell is a dummy object you use to add a row only.
in your -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath, make sure check whether indexPath.row is equal to [array count], if that's the same, then
insert whatever the object you create to your array at index = [array count]-1.
Call your [tableview reload] method. Then you will see the cell append to the table view.
Hope this helps.
Ok, I'm stuck. This is an extension of a previous post of mine. Here is what I am trying to do.
I have an Edit button on a navigation bar that when pressed adds a cell at the beginning of my one section table view. The purpose of this cell if to allow the use to add new data to the table; thus it's editing style is Insert. The remaining cells in the table are configured with an editing style of Delete.
Here is my setediting method:
- (IBAction) setEditing:(BOOL)isEditing animated:(BOOL)isAnimated
{
[super setEditing:isEditing animated:isAnimated];
// We have to pass this to tableView to put it into editing mode.
[self.tableView setEditing:isEditing animated:isAnimated];
// When editing is begun, we are adding and "add..." cell at row 0.
// When editing is complete, we need to remove the "add..." cell at row 0.
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
NSArray* path = [NSArray arrayWithObject:indexPath];
// fill paths of insertion rows here
[self.tableView beginUpdates];
if( isEditing )
[self.tableView insertRowsAtIndexPaths:path withRowAnimation:UITableViewRowAnimationBottom];
else
[self.tableView deleteRowsAtIndexPaths:path withRowAnimation:UITableViewRowAnimationBottom];
[self.tableView endUpdates];
// We nee to reload the table so that the existing table items will be properly
// indexed with the addition/removal of the the "add..." cell
[self.tableView reloadData];
}
I am accounting for this extra cell in my code, except I now have two index paths = [0,0] - the new cell and the old original first cell in the table. If I add a call to reload the table view cell in setEditing, the cells are re-indexed, but now my table view is no longer animated.
I want my cake and eat it too. Is there another way to accomplish what I am trying to do and maintain animation?
--John
You can do what you want but you need to keep your data source consistent with the table. In other words, When the table is reloaded, tableView:cellForRowAtIndexPath and the other UITableViewDataSource and UITableViewDelegate methods responsible for building the table should return the same cells depending on editing state that you are adding/removing in setEditing:antimated:.
So, when you insert/delete a cell in setEditing:animated: you need to also make sure your data source reflects the same change. This can be tricky if you are adding a special cell to the beginning of a section but the rest of the data is from an array. One way to do this is while reloading the table, if editing, make row 0 the add cell and use row-1 for your array index for subsequent cells. If you do that you'd also need to add one to tableView:numberOfRowsInSection: to account for the extra cell.
Another way would be to have a section for the add cell and it would have 0 rows when not editing, 1 row otherwise and you return the appropriate cell. This will also require you to configure your table and cell(s) appropriate depending on how you want things to look.