I am working on auto layout and making those UIIMages as Button.
I would like to make those button to be clicked and switch the images
as well as showing some words in the label.
In this case what should I do?
In addition, as it is shown, the auto layout ratio is different only from the iPhone SE. In. this case What should I consider?
Many thanks,
The first thing you need to learn is auto layout. Start with basic Always go with Apple's doc first
This one I likes he is good and you will also find how to use buttons as image view, using card game example, check other tutorials also very helpfull.
Stanford university autolayout by Michel Deiman
As far, your question just gives your label Horizontal in the container constraints(open storyboard in the right bottom third from last (allin) click on it popUp will open), and 20 bottom to the buttons and it will be in the centre. Every elements need x,y height and width so it knows exactly where to place, so you also need to give constraints to the buttons, Learn stackView to understand how to place your button without giving many constraints to each button and stack view will handle it for you, try hide and show to one of the button and magically stack view will adjust all adjustment. I suggest before staring Do read apple's doc first.
And Your question is too broad to answer, so read and try adding different constraints based on your need and ask a specific question(after trying by yourself) like why this label getting cut what constraints should i add so people know exactly what you want to achieve, people are always ready to help, just ask the right question.
happyCoding
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I'm new to programming and I'm trying to work with Xcode. I have no experience. I'm trying to make an app with Xcode. I'm done with the code, the only issue i have is with the storyboard constraints. I need some one who can help me to set them up.
So, i have 28 buttons as you can see in the picture, I want to keep the size of 65x65 pixels. that means that the distance between them should vary in different device sizes(4inch, 4.7inch and 5.5inch). i also should mention that i want it to be only in portrait view and only for iPhone.i hope someone can help because I'm to noob for this, I've searched a lot on the internet but I'm not able to do it.
UIStackView (iOS 9+)
UIStackView was introduced in iOS 9, which is very useful in your case.
Edit: Before getting started, make sure to have size classes to be w Any, h Any, this will make thing easier.
To use this, search UIStackView in your utility panel.
Drag an drop a Vertical Stack View on the view of your view controller and set the constraints so it spans the whole screen.
Select the stack view we just placed and set the distribution to Fill Equally.
Drag and drop a Horizontal Stack View onto the vertical one.
Select the horizontal one and set the distribution to Fill Equally.
Place your buttons in the Horizontal Stack View.
Copy and paste the horizontal stack view multiple times based on number of rows you want.
That's it.
You can control the buttons' background images to make it smaller (65px), or you can place a view as its' parent then align horizontally/vertically to place it to the center, like this:
Orientation
If you'd like to lock the orientation throughout the app, go to the settings of your project.
Sample project
I made a sample project for this question, you can check it out here: https://github.com/cyhsutw/UIStackView-example
I've been doing iOS for a while now, but when it comes to dynamically hiding / showing elements, I'm a bit lost.
Coming from Android, I'm used to being able to simply set views to visibility gone, but this doesn't exist on iOS.
So let's say I have the following scenario:
Basically I want to have a table, but the table should not fill the entire view controller. Instead it should leave place for optionally either a button, a multiline label, or possibly both at the bottom (if visible, these should be fixed, not scroll).
One way to solve this would be to use auto layout and modify constraints, like adding a zero height constraint. But that would make iOS kill one of the other constraints, which would make it hard to change it again. For the label, I wouldn't always want to have a height constraint, because it could be multiline, and should take the size it needs.
Maybe it's easier to skip autolayout here and modify frames instead, I don't know.
My question is: What approach would be best here?
Is there some other way of doing this I haven't thought of, or do I have to try to do what I described above?
I'm not primarily looking for code (code can be ok), but I'm more interested in a description of how it can be done.
I'd like to support iOS 7.
This problem had a variety of solutions, and opinion based, but I'm facing such questions a lot, when I don't know what to choose and what would be the "right thing".
So, I my opinion, the best solution here is using autolayout, you need to set height of label manually, but you have a few methods for this, at least you can play with it and if you don't succeed ask question about it. Using frames, you'll face same problem of calculating height, right? But with auto layout, you only need to set height, vertical space to 0, when you need to hide message.
You can also use constrains with priority lower 1000, and remove completely constraints from message (button, label) if you don't need it at all anymore.
For example, taking your layout image, you can make UIView with subviews: button, label. Top constraint connect to the UITableView, other constraints to the sides.Label and button will calculate the view's height. The only question here is label height.
So in ios assuming that the background of both these objects is opaque only the front most view in the Heirarchy will be visible and interactable, An easy solution would be to change the different frames of these two things you need and make sure they are in the back of your view heirachy, and when you need them to appear use view.bringSubviewToFront(mySubview) and view.pushSubviewToBack(mySubview) to make it disappear again. View obviously would be referring to main view of your view controller.
I am designing a simple user interface for an app using Xcode and Auto Layout. I have a view controller with three basic outlets: a static image view, a label and a button. You can see it in the picture shown below.
As you can see, I'd like to have the image view horizontally and vertically centered in the view controller, the label just below it and the button somewhere in between the label and the Bottom Layout Guide.
The problem is that I am experiencing some appearance problem with the iPhone 6 I am using for testing. The interface items are not nicely centered as they are supposed to be, as you can see from this screenshot.
I am not asking for the solution to this problem, though. I would rather know whether there are best practices to design a good user interface. For example, is there some way to temporarily hide the label and the button from the view controller to focus only on the debugging of the image view without having to remove and redesign them again?
Select the label you want to hide,then uncheck the checkbox installed
You can simply set its alpha to zero .
This is the most complicated UI related problem I've come across yet. I've been trying to find a solution for literally weeks but no avail. Let em explain.
In this app I'm working on, I need to display a certain list. It's actually a schedule. Here's how it should look like,
The fields circled by red circles don't change. To explain what change means I have to show you this.
Its a set of filters which the user can show/hide certain fields and the ones that are circled in the first image are static ones. They can't be toggled on and off.
Now the problem arises with the ones that can be toggled. Here's what it looks like if you turn off the Show Actions flag.
A new label with a blue background replaces the bottom one you can see in the first image.
Here's another one where you disable Show Time option and the time labels are gone (yes it affects only for some. Its expected).
If this filter list were an option list, it would have been easy. Just create a custom cell for each option and you're good to go. But unfortunately the user is able to toggle multiple filters! For example the user can turn off both Show Actions and Show Time and it'd look like the last image but the bottom label would have the blue label in the third image.
To top it all off, the cells' height is dynamic. In iOS 8 creating self resizing cells are easy enough from the IB when you could just add auto layout constraints and done.
But it seems to me that creating these cells from the IB isn't an available option to me. Simply because there are way too many filter combinations a user can make. So the cell's subviews need to adjust to it.
My question is how can I create a dynamic cell like that? My best guess is through code, right? I haven't written my UI in code before so I tried creating a test project to familiarize myself with it. But the problems I'm facing is setting fixed frame sizes makes the dynamic nature obsolete. And how can I move a view to fill up a removed view's space (Last image. Time labels are gone so the name and the id labels move to the left to fill that space).
I know this question is a little too broad. I'm not asking for a straight answer either. I'd really appreciate some pointers, or even a better suggestion on how to approach this because I'm truly at the rock bottom on this issue.
Thank you.
It's hard to give you any precise help since your question is so broad. First, I would recommend watching the 3 videos on Auto Layout from the WWDC 2012 (sessions 202, 228, and 232).
To answer your one example, how to move a view to replace a view that's removed. You would need to make two left edge constraints from the view with the text (Kund Alof...). One with a constant of 0 to the time label with a priority of 1000 (that's the default), and another to the left edge of the cell, also with a constant of 0, but with a lower priority, say 900. As long as the time label is present, the constraint to it will determine the position of the text label, but when it's removed, the lower priority constraint to the left edge will take over and move the label over to the left edge.
I've read quite a bit about spacer views - they seem very handy in utilising all this auto layout stuff.
I understand all of the concepts behind them, that's fine... I'm looking to practice with them now but before I could even get started I've found myself getting stuck on a more fundamental issue that's really doing my head in... maybe I'm too tired.
How do I actually place a spacer view? I'm looking for some drag and drop, native kind of thingy... but I can't see any "spacer view" in the object browser.. do I have to create this view myself? Where does it come from?
Spacer views are just standard UIViews.
If you want to make them easier to use in IB then give them a coloured background and make them visible but in the runtime attributes give them a Boolean...
Hidden = YES;
That will hide them in the actual app.
The reason they are used with auto layout is because you can't create equal spaces. A space is the gap between two objects. It isn't an object itself so you can make two spaces equal (for example).
But you can replace the spaces by instances of UIView and now you can give these UIViews equal widths or heights. Make them hidden and the constraints still act on them but they cannot be seen.
There's a simple "UIView" widget you can drag and drop from the lower-right corner area of Interface Builder. I don't believe there's any official "spacer view" terminology in Apple's kit...