HeaderView | Create an header for

I'm trying to make QTableView auto-adjust the height whenever column width is changed, I have sub-classed QHeaderView though I was not able to actually utilize it, I'm using sectionResized signal of QHeaderView whenever column width is changed, and on the basis of new columns and the string length for the column header, I'm trying to estimate the height.

I have an iOS view consisting of a collectionView with a headerView. The view displays fine, but when I rotate the device (iPad), the header elements get duplicated and don't fit correctly. The output window shows the following

In my application, I called one API for getting some of data and from that I am downloading files. After downloading callback called. In this case table view updated well. But suppose user visit the screen and before downloading content back to previous screen and again visit same screen. In that case table view not updated. I am facing this issue only when user back to previous controller without completing download content and come again on same screen.

WarrantyVC.Swift

So, basically im creating a HeaderView that consists of a ZStack that takes the entire screen space since it adds a pure black background and the entire header which sits on the black background (hence the need for a Zstack). Everything looks how I want it to, however Im having a hard time trying to put my HeaderView on the top of the ZStack to make space for all the other views I need to add below the header.

My current code is:

Hi I've watched a tutorial about this issue and I can open and close tapped sections in my table view, but if a section is open and I am going to open another section, I want the previous one to be closed, but I can't.

TableViewCodes

I am trying to add a rounded tableview header on top of a tableview. Its top is below an image:

so my idea was to draw a shaped view and add this view as a header. But from the solutions I saw, all I was able to was this kind of shape:

My question is: how to have this view without the extra hight? So no hight below the corners. Any other way to have achieve design is also good.

my code:

I use Firebase Storage to store an image file and when I tried to send it to the Realtime Database the data rewrote the whole data so my existing data is gone and replaced by just the image URL data. How do I send it without deleting my existing data?

This is my code:

I am trying to implement waves image at the bottom of the screen as shown in image below. I have tried alignSelf:'flex-end' but it does not work. If i give top with dimensions then if screen size change image top also change. how to implement waves image at the perfect bottom?

I have also tried svg but could not make it work.

Here is my code

I want to know when the user has ended the scroll on a Webview displaying a Terms & Conditions to display an "Accept" button only when the user has read this.