When UIImageView is empty...than resize the UILabel and hidden the UIImageView.
Anyone a idea?
You can either change label bottom constraint constant to either bottom spacing or image view top constraint - depending of visibility of image view or
(Available in iOS 8.0 and later.)
Create two bottom NSLayoutConstraint for label. One with lower priority to bottom of the view and one with higher priority. Change active property to YES/NO of the one with higher priority depending of image view visibility
Related
When using Auto Layout, I am unable to set up a simple UIScrollView in my view controller in Xcode 11 beta 7. 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?
I'm using beta 7 currently
I was finally able to successfully add a UIScrollView using storyboards in Xcode Version 11.0 (11A420a) after much trial and error.
You can add the scroll view directly to the root UIView of the VC or, if you needed to, add it to another UIView under the root view as needed by your UI Design. Constrain the UIScrollView parents normally for whatever your needs are.
Here is the key : when you add the UIScrollView to the storyboard, click on the Size Inspector with the UIScrollView selected. You have to UNCHECK the box that says "Content Layout Guides".
If you do this you can set the scroll view's contraints normally (I did 0-0-0-0 to superview). Then I added a UIView to the scrollview and set it's constraints to 0-0-0-0 and a height of 900 (which is what I wanted).
This will give you constraint errors in red when you set them. They will be fixed by setting the width of the UIView equal to the width of the UIScrollView.
Set the UIView width equal to the width of the UIScrollView view by Ctrl-right clicking on the UIView, dragging to the UIScrollView, and selecting the "Equal Widths" option. This should get rid of your constraint errors.
You actually can then go back to the UISCrollView Size Inspector and check the "Content Layout Guides" checkbox, no constraint errors will appear.
Disable the content layout guides in scrollview properties.
Hope it helps.. :)
I have created a UIView with two subviews; a uibutton and uitextfield. The button is on the left of the text field and constraints determine the horizontal position for the text field automatically. Similarly the UITextfield expands to fit it's text content dynamically using constraints too.
I want the superview (UIView) to expand to the width of the both controls automatically but can't find a way to do so. Could someone suggest a way to create constraints for a superview so it adjusts when it's subviews change size?
Thanks
D
Update
Heya, So I am trying to create a Tag-Textfield like the following, where the user can enter text on the right or press a button on the left to prompt a modal popover list:
I want to show a NSCollectionView inside a NSTableCellView. I have it setup correctly, and it works for the most part, but the collectionView's scrollview doesn't seem to resize properly against the NSTableCellView, even though I have auto-layout constraints setup for this.
Is there anything I can do to setup constraints in a way that the scrollview resizes against the NSTableCellView (which should also let the collectionView also resize itself)?
EDIT:
To elaborate, what I really want to do is have the collectionView expand and resize as the window is resized, and have it take up the same width as the tableViewCell, and depending on the number of items in the collection view, resize the height of the outlineView & hence determine the height of the outlineView's row. It works fine when the collectionView is part of an ordinary view, but I can't get it to resize itself inside a NSTableCellView.
Firstly, remove all of the constraints you've set for your collectionview/scrollview.
Now, you will need to make 4 constraints, one for each of the leading, trailing, top and bottom space from the scrollview to its superview. Make sure width and height are not constrained. I've done this in a recent app I've made and it worked rather well.
EDIT: Below in the comments we figured out the column wasn't resizing so the constraints were correctly set.
I'am using autolayout with NSSpliView, the setup is as following on the picture
The split view is in a window which can resize, when it resizes, the divider is changing proportional 50:50, how to change this, so that the height of the bottom view stays and the top view gets resized (but no more than 124px) but still have the freedom also to change it manually by dragging the split?
So just to recap you have three requirements,
Bottom view stays the same size on resize
Reduce the holding priority if the top view (select the NSSplitView to get the correct inspector)
Top view cannot resize more than 124px
Add a inequality constraint which sets the height of the view to less than or equal to 124px. You can do this in IB. It will also be a good idea to create a IBOutlet for this constraint in your custom view of controller class for the next step...
When the divider is moved the top view should be able to get smaller than 124px.
I not entirely sure but checkout the NSSplitView delegate method such as splitView:resizeSubviewsWithOldSize: or splitViewDidResizeSubviews:. When you resize with the divider the delegate method should override the height constraint to be the current resized size. So something like the following in the delegate method
self.heightConstant.constant = NSHeight(topView)
Or you could just remove the constraint and re-add it later when needed.
I have a NSView with a NSTableView inside of it.
If the view looks like this:
And the size & position properties for the Scollview (and tableview) look like this:
Then why when I resize the view, does it look like this:
Are my autosizing properties not set correctly? To my understanding they should be?
To make it clearer, you won’t see autoresizing behaviour whilst designing your view in Interface Builder unless the border of the subview coincides with the corresponding border of the superview and Live Autoresizing is enabled.
This behaviour exists because resizing the superview can be used to indicate that you want a certain margin between the subview area and the superview area — for instance, you might have a 100pt margin between the subview’s right border and the superview’s right border, and then increase that margin to, say, 200pt by dragging the superview handles.
Edit: On the other hand, if you want to resize the superview whilst keeping the margins according to the autoresizing mask, you can drag the superview handles whilst holding the alt/option key.
Use Cocoa Simulator (File -> Simulate Interface) in order to test your interface, including autoresizing behaviour.
The table with its scroll view will autoresize to your view's size only if you enter dimensions in by hand in Size info panel. They will not autoresize if you drag view's handles with mouse.