TableView | looks like a TableView , can scroll | Android library

I have an iOS app, since upgrading to Xcode 13, I have noticed some peculiar changes to Tab and Navigation bars. In Xcode 13, there's now this black area on the tab and nav bars and on launching the app, the tab bar is now black as well as the navigation bar. Weird enough, if the view has a scroll or tableview, if I scroll up, the bottom tab bar regains its white color and if I scroll down, the navigation bar regains its white color.

N:B: I already forced light theme from iOS 13 and above:

In iOS 15, UITableView adds a separator between a section header and the first cell:

How can I hide or remove that separator?

A few notes:

1. The header is a custom view returned from tableView(_:viewForHeaderInSection:).
2. When looking at the view debugger, I can see that the extra separator is actually a subview of the first cell, which now has a top and a bottom separator.
3. Other than setting tableView.separatorInset to change the inset of cell separators, this is a completely standard table view with no customizations.

After starting Xcode 13.0, I get plenty of Position and size are ambiguous for ... and Width and horizontal position are ambiguous ... layout warnings on an app, which didn't show up on previous Xcode version some days ago (I didn't change anything after Xcode upgrade). Mentioned objects show properly on device and simulator. Checking in detail, it reveals that all constraints seem to be correctly set.

Above example is pretty straight forward. I don't really see what the reason for the warning could possibly be.

Even more weird ... when I change the name of a label somewhere at the top of the tableview, most of the warnings (not all) just disappear. This label is in a cell which is totally unrelated to the objects generating the warnings. After restarting Xcode, the warnings are back again.

Also Update Frames doesn't solve the issue.

Is this an Xcode bug or do I miss something?

--- UPDATE 1 (20.10.2021) ---

1. I noticed that the Main.storyboard shows ambiguous="YES" for concerned objects. Manual delete (while Xcode 13.0 is closed) doesn't help. ambiguous="YES" is back upon next Xcode start.

2. I noticed that all warnings refer to constraints of objects, located after tableview cell 16 downwards (spread across 4 sections). This can't be a coincidence.

Are there any limits in the number of allowed cells inside a tableview and/or section?

--- UPDATE 2 (21.10.2021) ---

Some more details. After lots of testing and reading still no solution.

The entire issue is about a tableview controller, having 7 sections with a variable number of cells (2, 2, 1, 12, 1, 3, 2). The warnings show only after cell #11 in section #4, hence cell #16 counted from the top (disregarding section boundaries).

Xcode shows many incoherences in terms of change/impact relationship as shown below.

1. There is a setting to disable warnings (TARGETS > Build Settings > IBSC_WARNINGS), but this doesn't change anything to the number of warnings shown. Manually (depreciated) delete of ambiguous="YES" in Main.storyboard file doesn't help. I don't see anything bad in giving that a try (after a backup of Main.storyboard). The question probably boils down to why Xcode adds the ambiguous tag to Main.storyboard at a first place.

2. The project shows a yellow warning symbol top right corner of tab bar, as well as 10 warnings right of the target/device bar (very top of Xcode window). Clicking on that one opens the Issue navigator showing the 10 warnings. The storyboard shows however a red error symbol right of concerned tableview controller. Inside this list, only errors and no warnings (so now, errors or warnings?). The number is 16 errors, while the number of warnings in the top bar of Xcode shows 10 warnings. Trying to Add missing constraints doesn't do anything. My manually added constraints are apparently correct. See trivial example of OP (Reset settings). Lots of contradictory information across Xcode window.

3. Changing the Document label (Identity inspector) of a switch belonging to a cell issuing a warning (e.g. cell #16), the total number of warnings goes down to 0! This label is only used by Xcode storyboard interface and doesn't show up on app UI. So why does it have an impact to constraint warnings? Non-related change solves a problem?

4. If the warning count is 0 due (3.) above, restarting Xcode brings all back to previous state = 10 warnings. Why 0 warnings after a settting change, then again 10 warnings after restart?

5. As said before, the mess starts in cell #16. However this one is a copy/paste from cell #15, which doesn't generate any warnings.

6. View Debugging (Frames, Alignment rectangles) shows the interface correctly - on device and simulator.

When the app runs, the layout is actually displayed exactly as designed. These warnings don't seem to have any impact on actual operation. Also they didn't show prior Xcode 13.0.

There are quite some issues regarding layout ambiguities online, but rarely any solution. Most of the time, the author resigns by just accepting the nuisance. My intention is understand why these occur and to to fix potential hidden issues (if any).

Here its my model looks like

I am literally desperate. I don’t know why but every time I try to run my program this error comes out. I am using Netbeans, with Java 10.0.2 in order to have already installed JavaFX. I think it’s due to some problem with the FXML file. Can you help me?

I am using UITableView for a multi-section list. The issue I am seeing is a space above the cells of each section, even if I set tableView(_:heightForHeaderInSection:) to be 0. This occurs even when there is only one section and I set tableView(_:viewForHeaderInSection:) to be nil.

I have tried all other answers on StackOverflow relating to inset overrides/edge expanding but none have worked.

Example:

I'm creating a JavaFX application. I started developing it using local SDK and now I was trying to use Gradle. I created the build.gradle as follows:

UITableView with multiple sections without section footers is shown with an extra space between sections. Xcode's view debugger shows that it's not a view, but just an empty space.

In my case the behavior is unwanted.

Playing with adding a 1.0/0.0 height footer doesn't help. Neither does changing the table view's style.

Here's a sample code:

Ever since I downloaded Xcode 13 I have been unable to see the quick help window (option click) for objects/functions/variables I have created.

I can see the quick help window for other swift frameworks (option clicking tableView works, for example). Just not for my own.

I have tried

• running this in command line: