So I have the following view hierarchy :
A full size scrollView in my viewController's view with the following constraints :
These are the constraints on containerView (ignore the second last one, its a hacky semi-fix for my problem):
I have the status bar, the navigation bar and the tab bar visible.
The thing is that when I set a breakpoint to check the scrollView's contentInset, it shows 64 on top and 49 on bottom, left and right are zero.
There is no way to set contentInset in IB, I tried setting it in an IBAction to UIEdgeInsetZeio, but that didn't fix it either. This is screwing up my scrollview by adding space above and below my contentView, how can I fix this?
By default the view controller extends the view under the top navigation bar so your content will blur under a translucent navigation bar. This is controlled by edgesForExtendLayout which is managed in Storyboard via the Extend Edges setting.
By default, the scrollview will automatically adjust its content inset so the content appears below the top layout guide. This is controlled by automaticallyAdjustsScrollViewInsets which is also managed in Storyboard.
What you did was constrain the top of your scroll view to the top layout guide instead of the top of its superview. By doing this, you manually offset it by 64 points. However, the scrollview is still automatically insetting its content by 64 points, which is why you're seeing additional space above and below your scroll view.
Either constrain your scrollview to its superview (so its content scrolls under the top/bottom bars), or disable the view controller from automatically adjusting the scroll view inset.
Related
I got an NSTabView inside an NSView. That NSView is in an NSClipView, which in turn is in an NSScrollView. It looks like this (NSTabView in green, and NSView in red):
As you can see, the content of NSTabView gets clipped, and no scrollbars appear (since the view doesn't expand beyond the window).
How can I make NSTabView take up as much space as it needs (doesn't clip out), and expand the NSView with it? Then, NSScrollView can deal with the scrolling of the overgrown NSView.
Since my content changes dynamically, I don't want to put in some hard values for the width and height of NSTabView's superview.
This is only part of it; here's now the overall hierarchy looks:
I want the NSTabView's superview to be scrollable instead of clipping out, like this:
The setup I'll describe is for an NSTabView that will pin to the top, left, and right sides of the scroll view. Note the NSTabView could be replaced with any other NSView, the setup is the same.
Starting with you putting a scroll view into the xib/storyboard, you'll have NSScrollView -> NSClipView -> NSView (document view). Constrain the NSScrollView to the edges of the window. Drop your NSTabView onto the NSView instance. Add constraints so that your NSTabView edge constraints equal the NSView and define a height constraint either explicitly or implicitly with other content inside the tab view that defines it.
Personally I like to change the NSView instance (document view) layout to use constraints, by default it uses autoresizing masks and this makes it difficult to keep it in sync with the NSTabView. We want the document view to be pinned to the top, left, and right sides of the scroll view. The size of this view is what determines the scrollable region so we want it to be the same size as the NSTabView so the height of the tab view will determine the scrollable area.
To change this, select the document view, and under the Size Inspector we want to change the "Layout" type to "Automatic".
Lastly, add constraints to the top, left, and right and you should be good to go.
If you want the scroll view to start at the top rather than the bottom, you should subclass the document view and override isFlipped:
class FlippedView: NSView {
override var isFlipped: Bool { true }
}
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.. :)
Recently I'm testing to do a very complicated view in xcode using nothing but scrollview and programatically added imgviews. Like this
What I did is, I put a UIView called contentview in a scrollview and I then add a lots of ImageViews in the contentview. The real thing is much much complicated than the illustration so I can't use tableview. Sorry for the poor illustration but I think you will get the idea.
Everything is fine until I tried to add the last constraint in code, which marked red in the picture. When I did it, it breaks the entire chain of constraint.
In another word, this is working
V:|-[view1(30)]-[view2(30)]-[view3(30)]
This is not
V:|-[view1(30)]-[view2(30)]-[view3(30)]-|
And btw, what is the proper way to do it anyway? I tried to add imageviews directly into the scrollview itself but I can't make the view to use autolayout like this
H:|-[view]-| The superview here is a scrollview
The result, this view will be very narrow in width. I guess scrollview doesn't have a width value or sth? that's my guessing. That's why I added a contentview as a holder for all the imageviews.
Try this, it will work. - http://natashatherobot.com/ios-autolayout-scrollview/
To summarize -
Add scroll view to main view.
Add a UIView (lets call it content view) to scroll view.
Now add all your views to the above UIView.
For each of them set the constraints so as the separation on all sides is 0. And finally add equal height and equal width constraints between the content view and the main view.
Ok, finally I did my own work.
The key to make scrollview and contentview and everythin else inside work automatically using nothing but autolayout is this.
1, Manually add scrollview to self.view, and a contentview to scrollview. Set both scrollview and contentview to setTranslatesAutoresizingMaskIntoConstraints(false)
2, set scrollview to H:|[scrollview]| and V:|[scrollview]|, set contentview to be H:|[contentview]| and V:|[contentview]|
3, Now try to add Views to content view and set their constraints to the contentview. You should see that when the views are larger than the current window size, the scrollview started to scroll. IE, this setting will automatically set the scrollview.contentSize using autolayout
UIScrollview scroll is not working when i tested application in device (iPhone 5), But scroll is working properly in iPhone 5/5s/6/6 Plus simulator. I am developing application using Xcode 6 and UIStoryboard with AutoLayout.
I set the top, bottom, left and right constraints of UIScrollview with relative to Superview. And i also set the constraints of every UIControl which is in the UIScrollview.
Has any one have solution regarding this issue?
Please see below screenshot for reference.
It's probably easiest to have the scroll view contain a single view, which then contains all of your scrollable content. That single view should be anchored to all 4 sides of the scroll view, and if it's only meant to scroll vertically (which is what your screenshot makes it look like), then set the content view to be the same width as the parent of the scroll view.
To make sure an UIScrollView scroll, you have to check
Size
Your content View is bigger than your Scroll View. If you want it to be scrolled vertically, make sure its higher; horizontally, wider.
Constraints
Make sure your Scroll View is pinned to its super view, Top, Bottom, Leading, Trailing.
Make sure your Content view of Scroll View DOES NOT have CenterY constraint set to Scroll View, cause that'd make content view stuck with Scroll View and it'd never be able to scroll. (That happens to me the last time I was stuck)
Interface Builder settings
Make sure the check in Interface Builder under Scroll View is checked:
Scrolling section, Scrolling Enabled.
In my custom drawn window I have a NSTextView under which I'd like to have NSScrollView separated by empty space. That's how I've set it up in xib.
In interface builder it looks fine, with nice space between the two of them
But when I run the program, the scroll view gets moves upwards, actually covering the text view:
But when I disable vertical autoresize of the scroll view, everything is working as it should.
text view and scroll view are under NSView so they are siblings to each other.
Most probably it was shortcoming of the system as the scroll view was being completely hidden and so then it was probably moved.
I've worked it out by subclassing NSScrollView and overriding
- (void)resizeWithOldSuperviewSize:(NSSize)oldSize_;
So now I can position the scroll view exactly as I wish.