AutoLayout | 自动适配所有机型的分辨率，来自鸿雁大神，推荐大家使用

I am a beginner in Android development. I am trying to study the use of Graphstream (https://graphstream-project.org) in an android app. I have created a basic activity with a drawer layout which includes a navigationview and frame layout where I intend to display the graph.
I have tried to use the code samples from here - https://github.com/graphstream/gs-ui-android-test/blob/master/app/src/main/java/ui/graphstream/org/gs_ui_androidtest/Activity_withXML.java

This is my code:-

I'm currently adding a UIImageView to a Table Cell, and when the cell is populated with data, I'm adding a UIImage (if it exists) to the UIImageView, however, the UIImage is offset like this:

I'm using AutoLayout to setup the Cell, as follows:

I'm pretty new with SwiftUI and I'm encountering a really unnerving issue.

I've created some custom views that are being shown with the right height inside the preview. When I try to add them inside a VStack, they behave instead like I'd set .frame(minHeight: 0, maxHeight: .infinity). Adding a Spacer() after the custom view, inside the VStack, do not solve the issue.

I don't know the size of those views in advance so I can't set a fixed frame size, is there anything I can do to prevent this behaviour? I even thought about calculate their content size and apply a fixed size accordingly, but it sounds like a developer nightmare :|

Thanks for reading, and for the help!

EDIT: The most simple code that raises the issue:

I have a UICollectionView where some of the cells should have a dashed border and some of them should have a solid border. Also, the cells can be of varying size depending on the content that is present in the data model.

The problem I am having is that I cannot get the dashed border to be the same size as the collection view cell and again, the cell size can change based on the content. But basically, the cell should either have a dashed border or a solid border. The solid border is easy to get to resize to the correct size.

Here is a picture of what it looks like right now. The dashed border is colored green just to make it easier to see.

Here is the view hierarchy debug view. There are two dashed borders here because I have been experimenting. The green border is a sublayer on the UICollectionViewCell's root layer. The grey border is a sublayer of a separate view that is a subview of the collection view cell's contentView property.

Here I am trying to add a UIView subclass that has a dashed border. Then, when I need to show the dashed border or hide the dashed border, I just set the hidden property of the view accordingly. This works fine, except I cannot get the dashed border sublayer to resize.

The view is resizing to be the correct width and height based on the AutoLayout constraints, as can be seen in the view hierarchy debugger screenshot above. But the sublayer is still the original size (approximately 50px x 50px, which I guess is coming from the UICollectionView because I am not specifying that size anywhere).

For this implementation, I have a custom UIView subclass called MyResizableSublayerView. It overrides layoutSublayersOfLayer to handle the resizing of the sublayer, or at least that is what is supposed to be happening, but clearly it is not working.

But then the MyResizableSublayerView class is used in the collection view cell to add the dashed border to the view hierarchy.

I've been scratching my head about this all day. I am try to have the iphone 6s reflect what the iphone 12 is showing. I'm not good at autolayout but I'd just like an idea or a point in the right direction so I can make it look like its counterpart. All help is appreciated.

(P.S I'm using storyboard and have never tried to do it programmatically.)

All help is appreciated.

I'm working on making scrollview programmatically using snapkit, it works scroll but the problem is that the last element(systemTeal color tempView) can't see fully.

I create contentView inside Scrollview, which is containing every element.

I am trying to get the second last value in each row of a data frame, meaning the first job a person has had. (Job1_latest is the most recent job and people had a different number of jobs in the past and I want to get the first one). I managed to get the last value per row with the code below:

first_job <- function(x) tail(x[!is.na(x)], 1)

first_job <- apply(data, 1, first_job)

I was tasked to solve this bug in the app (It's for comercial use so I can't link the project). I'm also completely new to Objective-C or IOS development and I have no idea why the following happens. Reminder, I'm using custom cells.

When the tableview loads, everything looks fine. Click here to see the example

But when I scroll up and back to the same postion the cell becomes blank, as if it had no data. Blank cell

If I repeat the same process everything looks fine again.

Here's the code for cellForRowAtIndexPath:

I am trying to implement a table view that allows the user to "show more" rows to toggle the full number of rows or a smaller number of rows. I have all the data upfront when the view is loaded, so I do not need to fetch any extra data.

I am able to get it working, but the problem I am having is that my table view does not smoothly animate when expanding or collapsing. What happens is that if the "show more" action is triggered, the size of the table is updated all at once to the full height of the table with all the data in it. Then the rows will animate.

Likewise when hiding rows, the table height will shrink all at once to the end height and then the rows will animate.

Here is a picture of what is happening. It just "jumps" to the full height and then it animates the rows. But what I would like to happen would be for it to smoothly expand the height of the table unveiling the data as it smoothly expands downward. I would like the opposite, where it smoothly slides upward when pressing "show less".

The way my app is laid out is as follows:

• UIScrollView
  • UIStackView
    • UIViewController
    • UIViewController
    • UITableView <-- the section I am working on here
    • UIView
    • ...

Basically, I have a scrollable list of sections of different data. Some sections are tables, some are just ad-hoc views arranged with AutoLayout, others have collection views or page view controllers or other types of views.

But this section is represented by the UITableView in the previous list.