I've been working with Xcode and Swift 3 for a couple of weeks and I keep encountering the same issue. When I have a UIScrollView with elements inside I always get a margin around the entire scroll view of about 20, this is even though all my constraints are set to 0 - so its pinned to all sides. I have copied code from various tutorials and read numerous StackOverflow posts but I just can't seem to sort this issue out.
My page is set out like this:
Scroll View (contraints: Align Centre X, trailing/leading/bottom/top spaces to the superview
Stack View (Child of the scroll, all constraints the same as above)
When I rotate the page it adjusts the size of everything perfectly using the auto layout stuff, but the margin is still there.
I have tried to manually adjust the size of the scroll view but whenever I run the app it makes no difference.
I am absolutely baffled how I can sort this issue.
A screenshot of my scrollview, more can be added if needed.
Double click on a constraint and it will open up the detailed view which shows the first item, relation and second item.
Click on "Superview.Trailing Margin" and untick "Relative to Margin"
Related
I have a window with a textview in a scrollview and two buttons. I have added constraints at all sides, leading, trailing, top, and bottom. For the buttons I have fixed width and height, and distance to bottom and edge.
I want it to look something like this:
And this is what Interface Builder keeps giving me:
It also keeps offering to fix ambiguities by adding missing constraints, but actually clicking the button has no effect. No constraints are added. The error (and the offer to fix it) remains.
I've tried added the constraints it is asking for, although I can't see why they would be needed and at least the buttons already have (fixed) width constraints. But I keep getting errors and the window keeps getting shrunk to nothing.
When actually running the program, the window looks fine. But I suspect these autolayout errors have something to do with this problem: NSTextView in magnified NSScrollView breaks on resize
The project is here: https://github.com/angstsmurf/spatterlight/tree/helpviewtest
(The branch helpviewtest is a cut down test case created specifically for this problem.)
You have a Text view embedded in a Clip view embedded in a Scroll view, none of which have an intrinsic content size.
IB has no idea what's going to go on at run-time.
So, while everything looks great when you run this, your code will have supplied enough information to lay things out as desired.
To get it to "look right" in IB (and avoid the errors/warnings), you can give the ScrollView a Placeholder Intrinsic Content Size:
Question: Can someone identify why I am getting the extra grey area shown in my add item (top screen in screenshot) and how to eliminate it?
I have tried manually setting the size of the background object, removing and re adding constraints, clicking all the Xcode generated solutions for handling the autolayout errors shown below, setting the presentation setting to full size ala this answer all to no avail; it refuses to be consistent with the main menu screen (bottom)
Context:
Running Xcode 11...I have two scenes in a generic barcoding app, the main menu and the add item scene, and I am designing with iPad's in mind. With the size class for ipad pro 9 (wR hR) and set to landscape orientation, my add item scene has a huge amount of gray area bordering the visible content, unlike the main scene (though there is also a little grey area in portrait)
Figured out what was causing my problem; was using the wrong form of segue between screens, per this answer, in my case, a modal segue when I should have just been doing a show segue. Deleting and adding show segues with the presentation set to Full Screen in the destination views Attributes inspector did the trick.
When using Auto Layout, I am unable to set up a simple UIScrollView in my view controller in Xcode 11 beta. I know that I must constrain the scroll view to the edges, and then set the scroll view width and height equal to the width and height of the entire view that contains the scroll view. However, I am not getting the option to set equal widths and heights when I attempt to do so.
When I do the right-click-drag from the scroll view to the entire main view, I get the following options:
Leading Space to Safe Area
Top Space to Safe Area
Trailing Space to Safe Area
Bottom Space to Safe Area
Center Horizontally in Safe Area
Center Vertically in Safe Area
In other videos, there is an "Equal Widths" and "Equal Heights" option that I don't seem to have.
Am I doing something wrong, or did Apple change the way scroll views work in Xcode 11?
Disabling the content layout guides in the size inspector (ruler icon) in properties
I was having the same issue, and by disabling the option it was gone.
I stacked with that problem as well.
Found a good guide that helped me:
https://useyourloaf.com/blog/scroll-view-layouts-with-interface-builder/
Basically what you need is 9 constraints (assuming you want to scroll only vertically):
1-4: ScrollView to Superview (top, bottom, leading, trailing). Make sure to connect it to parent view and not to safe area.
5-8: Content view to Content Layout guide (top, bottom, leading, trailing).
Content view Width equals width to Frame Layout Guide.
I also encountered this problem (Version 11.0 beta 3 (11M362v)). I solved this problem by first setting the layout in xcode10 and then running it in xcode11. I haven't found any official instructions yet, proving that this is a problem with xcode11, but for now, I guess this is a problem with xcode11 bate.
After spending a long time on this scrolling issue in Xcode-11. The conclusion on this issue is you have to choose the scrolling option while adding a new constraint.
You can refer to the following screenshot to resolve your issue.
These mentioned solutions worked for me.
Disabling the content layout guides in properties worked for me.
Well, I was facing this issue but I have found a solution.
Problem is the Safe Area.
Embed Scroll view in a UIview.
give Top, Bottom, Right and Left 0.
now give constraints of scroll view with this view.
Add Equal height and width of content view to this View.
parent view is automatically giving Safe Area. All you have to do is just embed your scroll view in a UIview and then give equal height and equal width of the content view to this view.
#Vadim's answer worked with a little adjustment.
Nothing else worked and I didn't want to disable 'Content layout guide'. Since apple enabled it, why disable it. So there must be something I'm missing or it's a bug.
Vadim's answer is:
I stacked with that problem as well. Found a good guide that helped me:
https://useyourloaf.com/blog/scroll-view-layouts-with-interface-builder/
Basically what you need is 9 constraints (assuming you want to scroll only vertically):
1-4: ScrollView to Superview (top, bottom, leading, trailing). Make sure to connect it to parent view and not to safe area.
5-8: Content view to Content Layout guide (top, bottom, leading, trailing)
9: Content view Width equals width to Frame Layout Guide.
All good, but it didn't work,
But then I realize that the above 6 and 8 (trailing and bottom constraints to 'Content Layout guide') constraints are a little weird. They had positive constant values instead of zero. Like the below image. (constant equals to width and height of the scroll view). I changed them to zero and now it all works.
For me, initially the Content Layout Guides is in disabled state by default in ScrollView. So I just enabled and disabled the Content Layout Guides then the error disappeared automatically.
Xcode 11+, Swift 5.
I solved my issue, I prepared video and code
I'm trying to update my app for the new iPhone X. After reading about the safe area feature and the check box "Safe Area Relative Margins" in each UIObject's "Size Inspector" (ruler tab), I didn't think this would be too bad. However, that feature does not seem to be working for me.
Nothing changed for regular iPhones, which is good, however for the X, the top of my app overlaps the top inset of the phone by a third. Is there any known way to fix this* or something I'm missing?
*By fix this, I mean make it so that my objects start below the outcrop, like the second picture.
What is happening:
Desired Behavior (from https://arstechnica.com/gadgets/2017/11/how-devs-updated-their-apps-for-the-iphone-xs-screen-and-the-notch/):
I too have wasted hours on this. And while I cannot answer your question of why this is broken in Xcode, I can provide a solution.
But first let me note than in Xcode 11.3.1, I experience the same issue in a new project created from scratch.
Set up your storyboard:
On your storyboard, select "Use Safe Area Layout Guides". This will add a safe area to each of your ViewControllers. It will also require you to target iOS9+. You might be able to skip this step though (see step 4 below).
View your storyboard as iPhone 4s.
Fix each ViewController:
Select all views under the top-level view.
Click Editor | Embed In | View Without Inset. This creates a new view and puts all your views inside.
Make this new view expand to the safe area by adding safe area constraints (by control-dragging your new view onto the top level view).
Leading space to safe area
Top space to safe area
Trailing space to safe area
Bottom space to safe area
If you did not opt into using a safe area storyboard above, you may be able to create four equivalent constraints by using the Top Layout Guide, Bottom Layout Guide, and the left/right sides of the top-level view. This may not work in landscape though. And I did not test this.
Set your new view as transparent.
Give your new view a name like "SafeAreaView".
In iOS 11, margins are inset from the safe area. Thus, your zero top margin becomes a 20 top margin — explaining your screen shot. If that's not what you want, set the view's insetsLayoutMarginsFromSafeArea property to false.
In my case modalPresentationStyle = .fullScreen has to be set to the view controller being presented
I have perhaps a beginner's question but have not found any solutions addressing this specific problem after searching endlessly on stackoverflow and other forums.
My detail view in the storyboard appears to be too zoomed in. At this point, zooming in and out simply zooms in and out on the storyboard, but not the detail view specifically.
Indicators of this are that the alignment arrow to the left of my button is not positioned at half-latitude of the Detail View box, although when I align my button to this marker I do see a crosshair indicating that my button is "centered".
Detail View - Further Out
Upon simulation, it is apparent that using these crosshairs produces a run-time alignment far right and up from being centered. Where my button is currently placed seems to be in the center of the simulator screen but would like my guidelines to allow the button to be centered using the guidelines suggested.
Simulator View
A) How do I "zoom out" within the Detail View so I can see the entire screen in the detail view?
B) How can I center my object if the guidelines are inherently off-center?
Thank you so much for you advice and input.
Are you using constraints to keep the various controls in place etc...?
If not try:
Select all elements in the UI of the detail view. Click on an empty spot somewhere in the View and press CMD + A.
Click on resolve auto layout issues at the bottom right of the Nib editor. (it's the right most icon)
Click on Clear Constraints
Click on resolve auto layout issues again, then Reset to Suggested Constraints
From here, tweak your constraints as per the UI you're working with i.e. iPhone, iPad and whatever orientation it's in etc...
I forgot to mention how I fixed the "too zoomed-in" problem.
In the storyboard controller, on the left navigator panel, within the file inspector, I simply unchecked "Use Size Classes" within the Interface Builder Document section. My view controller changed into a normal iPhone shape and everything finally fit into place.