I want to make an interface in Storyboard which scales automatically for all iPhone screen sizes as shown in the picture below:
What I want is for view 1 and view 2 to have a constant height, but cover equally much of the horizontal space, and for the UITableView below to stretch all the way up to the UIViews. How can I specify constraints to achieve this effect?
I know how to do this programatically, but I have made it sort of a goal to learn storyboard in this project.
Anybody have any tips?
If you want view1 and view2 to remain fixed at the top, that’s easy enough to do by constraining view1.bottom == tableView.top.
If you want view1 and view2 to scroll with the table view, then put them inside the table view’s header. (To make a header, drag a generic UIView to the space just above the prototype cells in the storyboard editor.) I don’t recommend using constraints to try to make something outside the table view scroll with it, even though that’s (sometimes) possible.
Control-drag from view1 to view2 and create an “equal widths” constraint to divide the space equally.
Related
I am looking for a way to build a UICollectionView with a vertical flow layout that is embedded in a UIView. the UIView acts as the datasource/delegate for the containing collectionview. The behavior I am looking for is that the collectionview itself has its scroll disabled and the containing UIView grows as you add more rows to the collectionview. How can this be achieved?
I think you can achieve this by following steps,
Embed the UIView which you currently have into a UIScrollView(Make its constraint respective to its super view).
Then add height constraint to your UIView and create an outlet for that height constraint in our view controller, so as of now when the height of UIView gets increased the scrollView content size will also get increased.
Then place the UICollectionView inside the UIView and make its top, bottom, left & right constraints to UIView.
Now increase the height constraint constant value based on the number of collection view cells in the collection view.
I hope this will work for your scenario.
But if in case you are free to explain why you need to achieve this kind of behaviour it would be nice, because I cannot able to figure out the need for it.
This kind of scenario could be achieved. Here is rule of the thumb:
You should not specify height of you view, that will be contains unscrollable collection, pinned to it, and it should be embedded in UIScrollView using equals width, and pinned to all sides with margin. Auto layout makes things work.
Otherwise, is there any important reason to disable scrolling and make UIView delegate / data source for collection?
I want to achieve consistent views across different screens. My layout constraints works on small screens perfectly but it scrambles on large screens.
I have made a view(Red Border indicating that view)and pin it in to the main super view. Then I have made sub views and put it inside that view. I have pinned the the top bottom trailing and leading edge of the layout which contains button of the it's parent view (Red Border indicating that view). The view containing button is looking like this in small screen (iPhone 5)
while it's looking in big screens like this (iPhone 6 and above)
I want this layout to have the same relative height in all the screens like the other views. How can I achieve this?
I guess you can use UIView that contains a button inside and set bottom,lead,trailing,top constraints for the UIView. Then you can set height constraint of that UIView and set multiplier values to have relative height to its superView(=Red box). Finally, you can set constraints for your button inside the UIView whatever you want. If you know how to use StackView, I recommend you to use it because it is easy and simple solution. Here is very good tutorial about StackView.
If height is constant for subview except that button view the layout will be like what you mentioned in the first image .If you kept height as constant for that button view the problem will be solved
I have been trying to get ScrollView to work for 2 days now, and it doesn't work at all. Most of the suggestions here on SO and other websites say that you need to pin the ScrollView to the root view and then place a ContentView (UIView) inside ScrollView and then pin it to all sides of the ScrollView (so that the scroll size can determine the contentSize... However this does nothing). There's also conflicting information out there, one video says that there needs to be a constraint from the bottom of the ScrollView to the ContentView. Neither solution has worked for me. Here is what I've been doing in most of the combinations I've tried:
UIView -> UIScrollView
Pin all sides of the UIScrollView to the UIView
Create a UIView (name it content view) and place it inside UIScrollView
Pin all sides of the UIView to the UIScrollView
Problem at this point: UIScrollView needs constraints for X or width AND Y or width. The only thing that seems to solve the complaint is setting the UIView inside the scroll view centered horizontally and vertically, but this does nothing to make scrolling work. Another option is setting the UIView equal height and width to scroll view, but again, that does nothing other than remove the complaint.
I don't understand. Isn't pinning the sides, setting the constraints? IB seems to think that this is not the case.
What are the correct constraints needed? All I need is a simple view with stacked controls (to fill out a form) and the screen needs to be able to scroll if the form is longer than the screen.
I'm using iOS for the first time, and building purely from IB for now... minimal code solution would be best.
You are half way there. First you need to decide what you are going to display in the scrollview, you have placed a content view, that needs to have an intrinsic size. You can choose to put there static or dynamic views. Static views will have their size defined at design time, and that will resolve the UIScrollView AutoLayout constraints. If instead you are doing it at runtime with dynamic views you will need to choose a default size for your content view, create an IBOutlet for the width and/or height of your views and then resize them at runtime altering the outlet in viewDidLayoutSubviews. The video you linked explains that quite clearly.
It's a fairly stupid question but here we go:
I am using Autolayout right now to create a UIScrollview with 3 different UIViews I am scrolling through. I all created it using Storyboard and it works perfectly -- the first View is in the middle of the frame, and the 2 other ones are horizontally out of the frame. When I scroll in the Simulator it works perfectly.
All my frames have proportional widths to the main Superview, which means that they take the whole screen's space.
My issue is that I can't access the two other views to add elements to them through the Storyboard because they are not in the frame -- even if I change the ViewController's size, all the Views just get bigger because their size is proportional to the main view's size.
I would like to add elements to the right side of my second UIView (the third one is even more to the right), but you can't drag n drop objects if it's not on the ViewController's frame.
How could I solve this issue without having to mess up all my constraints?
Thanks a lot !
One way to deal with this is go to your storyboard -> select your firstView -> View Constraints and edit the 'Leading Constraint to Superview' constraint negative multiples of width of the screen like -320, -640. It will then show you the second and third view respectively.
Image attached below.
Note: You need to remember to set this back to 0 once you are done editing.
You can drag new views into the view hierarchy shown on the left, and use the same to select any items to edit them, add constraints, etc.
In xcode 5 using storyboards how would one make a fully operational vertical scrolling scrollview, with AutoLayout ON?
Considering the subviews have hierarchy:
1.UIView
2.UIScrollView
3.UIView (lets call this UIDetailView to make things easier)
Please be specific from code to constraints to wether any of the views HAS to be smaller etc.
UIScrollView with Autolayout within Storyboards Just Works
I've seen a number of people recommending the 'Container View' approach, AKA brute force, to solving the problem that they don't understand. It is non-optimal since you now have lost a big advantage of the scrollview by making it think the content is the entire scrollview rather than the subviews immediately attached to the scrollview.
Here is how I did it in the example that follows
--UIScrollView
|-> UITextView
|-> UILabel
|-> UIOtherStuff
When placing a UIScrollView into a UIView in a Storyboard just pin the edges to the 4 sides of the UIScrollView to the UIView. Now add your content to the UIScrollView making sure that you provide a minimum of two constraints for each dimension. The great thing about Autolayout is that it figures out how big the contentSize of the scrollview, or UILabels for that matter, needs to be based upon the size of the content inside it. AKA intrinsicContentSize. So if you are given a warning 'Ambiguous content size for scrollView' you know that you have not given the content enough constraints. For example, you might have given Top, Bottom, Left, Right spacing distance between views but the subview you're constraining needs a height too since an infinite vertical plane like this UIScrollView could assume your view was from zero to infinitely high.
To put it another way the Apple guide on Autolayout by Example makes a simple 3 point plan for success:
Create the scroll view.
Place the UI element inside it.
Create constraints that fully define the width and height of the scroll view content.
That top TextView with 'Min melding til' is also growing as you type more lines into it and the whole ScrollView grows to contain it. While I override the UITextView class to return a modified height constraint, the ScrollView itself works correctly without coding.
One last thing, lots of posts related to Autolayout try the magical fix-all incantation translatesAutoresizingMaskIntoConstraints = NO. This is only necessary if the view is created programmatically.
This blog post details how to use a UIScrollView with Autolayout ON, using a pure autolayout approach. Note though that all constraints in the blog post are defined through the Storyboard.
The approach in the post assumes the following hierarchy:
1. View (main view of my UIViewController)
2. Scroll View (UIScrollView)
3. Container View (UIView)
4. Content View (e.g. UIImageView)
I guess the Container View will be your UIDetailView, and the Content View will be any UIView inside your UIDetailView.
https://happyteamlabs.com/blog/ios-how-to-use-uiscrollview-with-auto-layout-pure-auto-layout/
The documentation clearly states how to do this:
A UIScrollView in auto-layout will always resize itself to fit the content (UIDetailView).
So you have to set up your views like this:
UIView: Position with constraints.
UIScrollView: Bind to UIView with constraints.
UIDetailView: Set size (intrinsic content size), max out compression-resistance, set top-, bottom-, leading- and trailing constraints to UIScrollView to 0 manually.
I had a similar problem and i found relative simple solution similar to DJ S's from within Interface Builder using pure Autolayout without any code.
For proof-of-concept at first remove any constraint in View Controller to if see this works.
This is sample layout:
View (main view of my UIViewController)
Scroll View (UIScrollView)
Container View (UIView)
Content View (e.g. UIImageView)
A. Scroll View width/height should be smaller that Container View width/height
B. Container View should have some determinated width/height (may be explicit width/height )
C. Do Control-drag Container View to Scroll View and add only:
Leading Space to Container
Trailing Space to Container
D. Check out those two constraints and set "constant" value for both to 0
E. Run app and
Because of the new iPhone 6 and 6+ screen sizes, I had to make a few tweaks to DJ S's solution.
The goal
Position a UITextView inside a UIScrollView, and also have 15 pt spaces from the left/right screen edges.
Views
1. Main View (main view of my UIViewController)
2. Scroll View (UIScrollView)
3. Container View (UIView)
4. Text View (UITextView)
Solution
For the spaces, I added 15 pt horizontal trailing/leading spaces from UIScrollView->Main View. To make the UITextView's width relative to the screen width, I added an Equal Widths constraint from UITextView -> Main View and set the value to -30 (2 * the 15 pt horizontal space). Now, the UITextView's width will dynamically adjust for any screen size.
The UIScrollView should have Scrolling Enabled. The UITextView should not.