I am very new to flutter and modern programming languages at all. At the moment I am working together with someone in order to create an app.
We are having problems with the layout of the grid and cards with different screen sizes and orientations.
Vertical Screen Screenshot
Horizontal Screen Screenshot
As you can see, the cards are messed up as soon as the screen width is too high. I don't have access to the source code right now, as the person programming it, is not available at the moment.
I read a lot about different techniques to build a card grid like that in a responsive way.
My guess the problem is, that the cards are not in containers with a fixed size. If they were, the pictures / buttons and texts inside that container would always look the same. Is that assumption correct?
Then my other idea was to use ResponsiveGridListBuilder to solve the problem that too few cards are shown in horizontal mode.
But as I said ... I am a newbie in flutter, so if any of you could make suggestions, I would be happy!
If possible, some code as an example would also help a bunch.
So far the programmer only tried different calculations of the cards in comparison to the screensize, but this didn't help as you can see.
Cheers!
I think it's better you use Wrap to fill the Row even in horizontal or vertical screens. but if i was in your shoes i would develop the items that are suitable and has const size for vertical and horizontal sizes, and let them to fill theirselves in the row depends on the width screen size that it has.
if you didn't understand what i mean i can explain it more my friend :)
happy coding...
Related
I am working on building a mobile application using flutter and am stuck on building a resposive login screen layout. To be precise, I am using the MediaQuery to find the screen size and to find the safe area and based on that I am spacing and building containers based on percentage of screen height. I would like to know if this is the best way or if I am unnecessarily complicating the entire process. I did come across a few youtube videos where most of them give random numbers but when I try doing that, my layout most often than not ends of overflowing!
So far, I have mostly done this with just mathematical calculations. i.e. I have stuck to calculating the available height (total height - safe area) and then built all my containers based on this height (including their spacing). But, I am struggling with getting the right font size and this constant struggle to balance the UI in both android and iOS setup is eating up most of my time.
I built hundreds of screens in Flutter. It is very rare that you need to use exact screen height for a layout. Most screens fall into one of the three categories:
There are too many elements to fit into a screen of any size.
In this case you wrap your layout in SingleChildScrollView widget that has a Column child, and then put all other widgets in that Column. Users scroll down to see all visible elements they need to see.
There are too many elements to fit into smaller screen sizes, but they fit into larger screens.
In this case you still wrap your layout in SingleChildScrollView widget. Then you make your layout look nice on larger screens, but users on smaller screens still have to scroll down. This is not ideal, but sometimes it's the right solution. Making design elements smaller on a small screen often makes it hard to use or even totally unusable. Plus, having various calculations related to a screen size in your layout logic makes it a nightmare to test your app: you have to test it on all sorts of screen sizes.
All design elements can fit into a small screen.
In this case you should use Flex widgets (like Column, Row, Spacer, Center, etc.) to create your layout. These widgets already have a logic for spacing their children in the available space (for example, using mainAxisAlignment and crossAxisAlignment properties in Column and Row).
There are also widgets that can take a specified percentage of a screen (or their parent widget), but I never use them. I can imagine situations where these widgets can be useful, but for the vast majority of designs using Flex layout is a better option that results in better looking screens.
If you post your design and the layout you came up with, we can point if there are ways to optimize it.
I am having severe difficulties finding a clear working world example of auto layout on multiple screen sizes. Most tutorials have basic stuff like a button thats centralised and then after adding constraints in Interface Builder it scales with the device. One button is simple but in my example for the iPhone 4:
There are quite a lot of labels / buttons and some that are not central. The above screen shot is exactly how I want it to look on all devices.
The app is for portrait only but I want to target all devices. I tried slowly adding constraints to items from the bottom up using a multiple of the superview to position and size items and then applying aspect ratio to UI Objects (got as far as the got it button but not the red arrow buttons) but as you can see in the next picture for the iPhone 8 plus... the white space isn't going to perfectly fill like in the iPhone 4 which will leave me with a big gap at the top.
Is there a way I can change just the iPhone 8 plus layout in Interface Builder to build a layout that caters for the extra screen size?
The iPhone 8, SE and X layouts are equally awkward with extra white space.
I tried size classes but that changes it for all phones.
Is there a way to centre what I have done so far?
How do you guys position objects in auto layout that are not centred?
Am I going about it the wrong way by applying X / Y constraints using a multiple of the superview? - same for the width. I'm only specifying widths as a multiple of the superviews width then adding aspect ratio.
I just need a real world working example I can learn the basics from or a system to create for multiple devices that I can follow. I don't want to use a 3rd party library.
I really hope someone can help point me in the right direction!
Krivvenz.
I have a problem in Swift with UITableViewCell background image. Let's say that it shows quite fine one iPhone5 but on iPhone 6Plus it is stretch and thus it looks bad. This is probably due to Aspect fill or something which I really couldn't manage to change and achieve what I want so would be the best if someone could poke sample code I am providing as well as image how it should look, so anyone can check it out and maybe give me some hint or tip or sample code or even fixed demo version.
So here it is:
Note that on left side there is a curve (like half a circle) around right side of icon. On bigger phones or tablet, that curve gets super stretch thus completely destroying the look.
Demo code link
Thanks all in advance for any help. I am pretty stuck with this one.
You can stretch an image while preserving the aspect ratio of a portion of that image using slicing. Xcode offers a graphical interface for doing this. The idea is that you decide what parts of the image are allowed to stretch and which aren't.
https://developer.apple.com/library/ios/recipes/xcode_help-image_catalog-1.0/chapters/SlicinganImage.html
I'm having some issues with the constraints in my app. Here is how it looks on the iPhone 4 (that's how i want it to look, and how i usually setup my interface, is this the proper approach or not?)
Now, when i switch to the iPhone 5 screen it looks like this
and as you can see, the blue dots (which is UIButtons) are not placed where i want them to be. I made my constraints rely solely on the right side of the view (since that is the one re-sizing, i found that in order for you'r views to align themselves accordingly, it doesn't help to align them to the left side). I don't really know how to fix this. I am finding this new iPhone screen to be a real pain in the arse. Any good advice on how to work with this new screen without a lot of headache would be appreciated :)
Thanks on advance
It looks to me like the are still the same distance from the right side of your view, as you said you set them to be, while the background has stretched to fit the new size. I suspect it's actually the background that isn't doing what you want it to do (keep the same aspect ratio and show more stuff on the left), or try keeping the buttons relating to left and right to stay aligned with the stretched background image.
I am a complete novice to iPhone/iPad development, but I have OOP experience in other languages. I apologize in advance if this question is rather vague.
What I really want to know is this:
My app idea needs to work in a single view where the view is a scrollable area that is a fixed height (bigger than the viewport). Various different events can happen within this scrollable area. The app will have an immersive feel to it (quite texture/image intensive), but it is not a 'game' as such (think scrollable bookshelf).
Which apple project would be a good way to start this? View-based? OpenGL ES?
How easy is it to make a fixed scrollable area?
From what you describe making a simple UIKit app will suffice. You should start either a window or view based project.
Adding a fixed scrollable are is very easy using a UIScrollView.
http://developer.apple.com/iphone/library/documentation/uikit/reference/UIScrollView_Class/Reference/UIScrollView.html