Id like to keep some views with in the bounds of the screen but because of the uiscrollview when I add constraints it expands horizontally and my views become really big. The views should be contained with in the screen and the only scrolling that should be done is to access the views at the bottom. How would I do this? I do not want any horizontal scrolling, just vertical scrolling. Im using Swift 2.0 and Xcode 7
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i have an issue that is driving me mad! I am trying out Xamarin for iOS app development. My issue is the do with auto layouts and constraints, i have a simple UIView inside a scroll view, i cant get this to resize on both ipad and iphone. The scroll view also leaves a margin above the view of constraints. Anyone had any issues with this?
1 - Add constraint to the child UIView inside the scroll view: Bind Top, Left, Right and Bottom.
2 - Set fixed Height to the child UIView.
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 a simple screen, with a slider and a label positioned next to each other horizontally. I have embedded these inside a UIScrollView (I set this to fill the screen and used 'Add missing constraints'), because I will need vertical scrolling later down the line. I don't however, want horizontal scrolling. I have seen numerous posts on here and other sources about people wanting to disable horizontal scrolling, however I'm not sure that's what I want to do, I think I need to restrict the UISlider from causing the horizontal scrolling; I think it is trying to take up more width than the screen. I have added what I think are the necessary horizontal constraints:
Leading space to container for the UISlider
Horizontal spacing to the UILabel, and
Trailing space to container for the UILabel
But this still causes horizontal scrolling, and the UISlider's are the cause, they are taking up more room than I want, as seen below:
I have tried disabling horizontal scrolling in the code using a few techniques, one being:
func scrollViewDidScroll(scrollView: UIScrollView) {
if scrollView.contentOffset.x>0 {
scrollView.contentOffset.x = 0
}
}
but this does not seem to stop the horizontal scrolling.
Can anyone offer any suggestions?
Thanks in advance.
My suggestion is to never use Add missing constraints. It never does what you really want.
Here's the problem. You are laying out your UI on a ViewController in the Storyboard that is square. Apple did this to remind you that you need to be flexible in your design, but it doesn't match the size of any device. When you Add missing constraints, it uses the absolute dimensions of that square to create the constraints which are certainly wrong.
In your specific case, it is giving the slider a width that is too wide, which is why the slider goes off the right side of your screen.
Here's the trick about scroll views. If the contents inside of a scroll view are wider than the scroll view itself, then that content will scroll. The same applies vertically: if the contents inside of a scroll view are taller than the scroll view, then the contents will scroll.
In order to design this to work on all phones, you need to make sure that the contents of the scroll view are laid out correctly for each phone size. Which certainly means you don't want to use specific widths for both the label and the slider because you'll end up with the wrong width for some device, if not all of them.
The best way to do this is to:
Drag out the scroll view and add it to your ViewController. Add constraints to make sure it is properly sized on all phones, such as attaching it on all sides to its superview with a fixed distance.
Drag out a new UIView and drop it on the scroll view. Drag its edges until it exactly matches the size of the scroll view. This will be your content view. Pin all four edges of this content view to the scroll view with offsets of 0.
Here's a tricky bit. Even though you've pinned the content view to the scroll view, its size of free to grow because that is what allows it to be bigger than the scroll view itself and allow there to be content to scroll over. To keep your scroll view from scrolling horizontally, you need to make sure the content view has the same width as the scroll view on all devices. To do that, find the scroll view and the content view in the Document Outline to the left of the Storyboard. Control-drag from the content view to the scroll view and select Equal Widths from the pop-up.
You still haven't told your content view how tall it should be. For now, give it an explicit height constraint of 1000. That will be enough to scroll.
Now, add your label and slider to the content view. In addition to constraining them to each other and to the edges of the content view, you will need to give your label a width constraint. Then Auto Layout will have all of the information it needs to compute the width of your slider. Auto Layout knows how wide the content view is (which will be different on different devices), it knows how wide your label is, and how far everything is from everything else, so it will just stretch the slider to fill in the rest.
If you do all of this, you will have a UI that is properly sized for all devices in all orientations that scrolls vertically.
Just embed all view in your UIScrollView in a UIView, give it the required constraints then the slider and label will stay.
That worked for me just now.
UIScrollView is special when you want use AutoLayout with it, subviews can not be added directly, it needs a container view to constraint the contentSize of UIScrollView, Auto Layout Guide:Working with Scroll Views explains the detail reason, and you can find many solutions to solve UIScrollView's auto layout on Google, Such as this answer.
To be honest, it's confused and complicated to understand UIScrollView's auto layout, but if you overcome this, others auto layout question is easy to resolve.
I'm writing an ios application, which has child views (like fragments or subviews) which are placing in a simple UIView in a UIViewController and the height of UIView is approx 300px. Im just loading subviews in UIView, however every subview has its own content that may not be fit in 300px thus uiscrollview cannot got though out the last view.
My problem is, Im unable to solve the scroll view content in order to scroll from parent UIViewController along whith its child view controller subviews, as the subviews are longer than 300px and thus uiscrollview is unable to get te last element.
I tried to to give static scrollview.contentSize.height = 1000 and hence the scroll view can scroll below the screen but im unable to click on the later views as it seems uiscrollview is unable to read that element.
My question is, how can i assign dynamic uiscrollview height assuming that im using autolayout in my uiviewcontroller and I want to calculate scroll height according to children based in my UIViewController. Im using swift 2.0 and autolayout in storyboard.
Your constraints should be like,
scrollview - top,bottom,leading,trailing
view (content view) - top,bottom,leading,trailing,fix height and horizontally center in container
and add your all other stuff in that view. you will got desired result. it will scroll in small screen size then content view and will not scroll for bigger screen then content view.
second thing you need to increase height of your content view as more subviews add. your content view's height should be equal to all subview's height and spacing
After this setup if you unable to scroll then check content view's bottom constraint's constant in size inspector. make it zero (if unable to scroll then only).
hope this will help :)
I have a UIScrollView that fills the width of the device and it contains several UIViews laid out horizontally. The views all have the same width, so on the iPhone one has to scroll to see all the views, but on the iPad all of the views are visible.
My question is how can I perfectly horizontally center the views on screen? When the available space is large enough to display all views, they need to be centered but when it's not large enough to display all views they can be laid out as they are now, simply left to right.
The interface has been set up entirely in Interface Builder. The scroll view is set to fill the entire device width - leading and trailing to superview. The first view in the scroll view has leading set to its superview so it's stuck to the far left. The last button has its trailing set to the superview - to the far right of the scroll view, to define the scrollable content area. Each view in the middle is laid out relative to the view to the left of it - leading to the previous button.
Here's a graphical representation of the current layout:
Here's a graphical representation of what I'd like to obtain:
Additional info:
The scroll view doesn't have to always fill the device width, as it is actually completely transparent. When all views are visible I want to disable scrolling. This will need to be adaptive, such that upon rotating the device it can change the layout if needed, because on iPhone in landscape all the views should be visible but in portrait they won't be.
You can try setting the contentInset property of the scroll view, which has a type of UIEdgeInsets. This property simply provides the scroll view with a certain amount of "padding", adding to the scrollable area.
You can determine how much extra space you have at the end (right-hand side) of your view, divide it by 2, and use that value to provide equal-width padding on each side.
Another purely autolayout-based approach could be:
Constrain your middle view to be horizontally centered in the superview.
Constrain each view relative to the middle view in a chain