My situation is that I have a collectionView which has two types of cells. The first cell type is a simple editable UITextField, then second contains a UITableView with editable UITextFields inside its cells.
My problem is that when the keyboard shows up due to the text fields inside the a table view cell and I change contentInset the change does not take place.
This is the code I am using to change the insets when the keyboard appears and its the same code for when the textfield in the collection view cell is selected, which works.
self.view.setNeedsLayout()
self.collectionView.contentInset.bottom = inset
self.view.layoutIfNeeded()
There must be something that I can't think of that is preventing contentInsets to change.
I also have a custom UICollectionViewLayout although I don't think this matters as that is only concerned with the contents of the collectionView, not the insets.
Any help would be much appreciated.
Turns out the reason it was working was because the cell with the textview in it was doing some magic autoscroll, while the cell with the table view textview was not, I'm guessing as it was to far nested in the view stack to handle this.
My fix was to adjust the contentOffset so as to force a scroll.
Related
I want to make a full screen scrollview with various views in it but also have a tableview in it.
The thing is, I don't want the tableview to "reuse" views.
I am using auto-layout.
People keep asking why. Here is why:
I want the scrollview to keep growing in height as cells are added to the tableview. (using storyboard) This is something I want to do. Stop "suggesting" a "better" way because I know the "better" way. I am asking for this way.
For example:
As cells are added to the tableview, the entire scrollview keeps growing.
Hope you are using autolayout, considering this i guess you already added constraint from the bottom of tableview to the uiview below it and also add a height constraint to the tableview. Make a IBOutlet of this height constraint. now write a method that would calculate the height depending on number of items you have to show for the tableview like
func calculateTableViewHeight() {
heightConstraint.constant = YOUR_CELL_HEIGHT * NO_OF_ROWS
}
Call this method after tableview.reloadData(). And also don't for get to set the scrolling for the tableview to false
I'm struggling with wired kind of problem. I have UITableView with one cell. This cell is only holding containerView with childViewController (second tableView). My problem is that, first tableView(parent) must have UITableViewAutomaticDimension row height but it doesn't work (It dosen't know correct size of that cell with second tableView).
How to get correct size of second tableView) ?
Second tableView (inside Cell) have scrollingEnabled turned off (tableView.scrollEnabled = false), first tableView must have correct size of second tableView in order to provide correct scrolling experience.
Since a UITableView inherits from UIScrollView you can use the contentSize property to get this information. This is how the scrollbar works on the side.
I have done a similar thing before (long ago), so the following is somewhat hazy/ irrelevant/ unessecary. There might be some gotchas with unknown/unrendered cell heights in the embedded tableview. I rememeber having to set the tableview height to a large number (forcing all cells to render) fetching the contentSize then resetting the tableview height to the contentSize.height.
Are you shure you really need second table view? If you have just one cell probably you don't need it. I recommend you to calculate table view height as the summ of it's cells heights. If cells of embedded table view have constant height it could be simple. In other case you also could calculate cells height.
I have a table with different cells and I need to add a scroller view with special UI in some cells:
I need to develop the UI which you can see in section 0.
So my questions are:
How can I add a scroller view?
How can I load data only for those items which are shown right now?
How can I change the width of "Line" column after scrolling to the right?
I'll answer as best I can with some starting pointers for you...
You need to subclass UITableViewCell and in your subclasses drawRect method you should add a UIScrollView to the contentView.
Not totally sure what you mean here, please expand.
In your new table cell, set it as the delegate of the scroll view you implemented, then you''ll get callbacks when the scrollview scroll with the contentOffset value, which you can use to calculate how much to grow or shrink the line items.
I have a UITableView and one of my table cells is a UICollectionViewController subclass that contains a UICollectionView of displayed email addresses. When a user adds an email the UICollectionView and it’s cell in the table view should get taller.
I’m currently attempting to do this setting my collectionView height constraint to collectionView.contentSize.height in the LayoutSubviews method of my collection controller/cell class. My issue is that the cell in the UITableView is not changing size when this happens.
I am assuming that this is because there is nothing telling the table view that the height of the email entry cell has changed. I am currently using dynamic cell sizing - or trying to anyway. Even, if I call tableView.reloadData() this still does not work. I’m wondering if someone could give me a high-level idea of how they would set this up.
UPDATE:
I had a broken constraint issue that was part of my problem, but this is still not solved. While have proven that I can update the height constraint and that will update the size of the collection view, it's out of sync. It's always one update behind. Here's an image showing the 'UICollectionView' in green and you can see in the logs that I'm updating the constraint (yes, multiple times) each time after adding a new item to the collection, but it is not updating the bounds of the view instance. In this example, if I were to add a new item to the collection, the next time I inspect bounds.height it would be at 149.5. What am I missing!?
i had answered this question in another tableview inside tableview cell that will work for collection view too ,i explained it in this thread
ask me if you faced any problem
It seems you want to set the height of your table view cell dynamically. This detailed tutorial walks you through making a custom cell class that will have dynamic height. Unfortunately, this tutorial only walks you through how to do this with auto layout constraints and a storyboard. In the tutorial you'll notice that the height of the cell depends on the constraints put on a title label within the cell. Try doing the same thing, but applying the constraints on the content in your cell (the collection view cell).
http://www.raywenderlich.com/73602/dynamic-table-view-cell-height-auto-layout
I have a UITableView in which I have several custom cells and my last cell contains a UISearchbar in it. I have wired up the appropriate delegates and referencing outlets and can get the keyboard to show up.
The problem I am facing is that the searchbar is at the very bottom of my tableview i.e. it is part of the very last cell. So even though the keyboard gets shown, the searchbar is hidden below it as I suspect it is unable to scroll to that location since its the last cell in the view.
Does anyone have any thoughts on this and how to overcome this situation.
The easiest solution is to have your view controller be a subclass of UITableViewController. This type of view controller will handle issues exactly like these.
If you cannot, you should listen to keyboard will show/hide notifications and set contentInset and scrollviewIndicatorInsets bottom of the table view to the keyboard height. Then you can scroll the specific cell into visible. When the keyboard hides, set the bottom to the previous value.
Yes....Two ways
1) either you can change the frame of whole tableView and pull the whole table up by decreasing the y position of tableView
[tableView setFrame:CGRectMake(100,100,100,100)];
or
2) You can change the contentOffset of the table to programatically scroll the tableView's last cell so that it is visible to the user.
[tableView setContentOffset:CGPointMake(0,400) animated:YES]
Hope this will help you.