Is it possible to have a View with autolayout , such that the subview has equal height with parent minus a constant?
The Hierarchy is UIView > UIScrollVIew > UITableView. The view is also embedded in a UINavigationController
Yes. You simply pin the subview to the top and bottom of its super view with the constant set to the offset you wish.
As the outside view changes, the inner view will change to match and maintain the offset. You will need to set left and right constraints as well using the same mechanism.
Edit after discussion:
The UIScrollView needs to know the size of your content. You can not simply use auto layout without a few adjustments.
Assumption is your view layout is:
UIViewController -> UIScrollView -> UIView -> UITableView
For your UIView, pin the top, bottom, left and right to the UIScrollView.
To see things properly in storyboard you also seem to have to center the UIView horizontally and vertically. Once you add this you should see the content fill the scroll view bar any edge offsets you set in your pinning.
Pin your UITable to the UIView top, bottom, left and right.
You are going to have to adjust the width in your code somehow to the size you want to scroll horizontally.
In Interface Builder:
Clear constraints on your subview
Select your subview
Choose Pin in right bottom corner of IB view
Select bottom pin and enter your constant (I entered 30), select top pin and enter 0.
Select other constraints if needed.
Accept with button Add x constraints
Related
In my storyboard, I have a parent UIScrollView in which I have a UIView of height about 2000px.
I have designed the whole view & placed an another UIView at bottom of parent scroll view so that it will be fixed in the UI. But at the specific point, I need to place that UIView(i.e.fixed) to get scrolled. Like after I scroll a UILabel, I want to scroll that UIView below that & get disappeared from the bottom.
I know its hard to explain but I am stuck at it for so long.
P.S. I'm using AutoLayout.
In this case it is probably best to have the view outside the scroll view but connect constraints to the inner view as well. You use priorities to control those constraints.
In your case you would decrease your bottom constraint priority (to 500 for instance). And you would add a constraint like outsideView.top <= insideView.bottom. So connect the outside view to one of the views inside the scroll view and create the relation be smaller (or greater if the 2 items are reversed) or equal to that view point.
To create a demo of this start a new project and open Main.storyboard:
Add a scroll view with constraints to leading, trailing, top, bottom
Add a blank UIView (now called innerView) inside the scroll view and add leading, trailing, top, bottom constraints
Add a height constraint to innerView to 2000
Add an equal width constraint between innerView and your scroll view
Set bottom constraint between innerView and scroll view to 100
Set a distinct color to innerView to see the effect
All other constraints should be set to 0
Add another UIView on the top level (now called outerView)
Pin outer view to leading, trailing and bottom. Also add a height constraint to 50
Set a distinct color to outerView to see the effect.
By now you should have a scrollable scroll view and a fixed view at the bottom if you run the app.
Now connect outerView with innerView and select "vertical spacing"
Double click the newly created constraint and modify it:
(If needed) Reverse first and second item so that the outer view is first item
Change relation to "less then or equal"
(If needed) select outerView.top
(If needed) select innerView.bottom
Set constant to zero
Select outerView and find bottom constraint to safe area (or superview) and set its priority to 500.
Now run the app. If all is correct your fixed view will be fixed until you scroll down far enough. After 2000px is visible the fixed view will be scrolling with scroll view.
You can naturally pin it to any view in scroll view to get any possible effect you need.
I hope this is descriptive enough. Good luck.
I've been trying to create a UIScrollView for user registry but with no success. I'm using auto layout and all of the fields that go inside the scroll view are static. Because of the usual ambiguous height issue, I've added a UIView inside the scroll view, set the constraints to the margins of the scroll view and centered aligned it. After that I added all of the fields inside that Content View, in the storyboard.
The content fields have their constraints setup as you would expect, but when I get to the lowest field and set the bottom constraint to the bottom of the Content View then everything breaks.
I'm asked by Xcode to set the priority of some views, and when I do as is says, the Content View size stays the same and the views are shrunken.
I tried not to put the last bottom constraint and resize the Content View by code but the height is not resized as is should.
I'm looking for a good solution to do this in storyboards and auto layout.
Update: I added a bottom constraint with a low priority, but the content scroll view is not expanding to show all of the fields.
Add&Set ScrollView(UIScrollView)
Add&Set ContentView(UIView) with subviews
! Set ContentView Width equal to View Width
Set all subviews constraints
View1 should be tied to the top of the ContentView
View4 should be tied to the bottom of the ContentView
All SubView (View1, View2, View3, View4 ...) must have a height and distance between each other
P.s. In your case, if iOS > 9.0 you can replace ContentView with UIStackView
You are using auto layout so the size of the content view is determined by constraints. Follow the below steps to provide proper constraints:
Drag the Scroll View inside main view and provide constraints Top, Bottom, Leading and Trailing in align with Super View (Main View) as
per screenshot.
Take View which will contain your content and drag inside Scroll View. and provide the constraints Center X, Center Y, Top, Bottom,
Leading and Trailing in align with Scroll View as per screenshot
Put all the element inside content view which is a subview of scroll view and provide Top constraint relative to the element above
it, to make equal space between the elements (eg. label, button etc.)
(Make sure you provide required constraint for X-position)
Last element is "Register Account" button make sure you provide the Top Constraint relative to country and Bottom constraint relative to
superview (content view) and change the priority for Top or Bottom
constraint as per screenshot, otherwise it gives error.
I am trying to implement UIScrollView from Storyboard using Interface Builder. The ViewController im working on have UINavigationBar.
This is the steps i perform within my Storyboard
adding UIScrollView and set the top, bottom, left, right spacing to 0 (not to margins).
add UIView and set it to be a child of the scrollView. set its spacing to: top, left, right to 0 and it width and hight to the value listed, also set spacing to bottom of the viewcontroller.
The strange behavior is that the top constraint get way high than expected,
What am i missing here?
Thanks!
Well what you can do is select your view controller from the heirarchy on the left and in the attributes inspector uncheck "adjust scroll view insets".
I have a UIScrollView added to my ViewController. And a View on top of that Scrollview. I have done the following:
Placed scroll view inside my original View and set top, left, right, and bottom constraints. Unchecking Constrain to margins.
Added a UIView within the scrollView (to hold my labels and such) and added the top, left, right, and bottom constraints, constrain to margins unchecked. And set equal widths to the original View
I then add an image view and three labels inside the view placed within the scroll view. And add top, left, right, bottom, and height constraints for them.
The scroll view works and my view does scroll and my labels and image view are centered but everything is very wide.
I am wondering how I make it so the View is not wide and I cannot scroll horizontally, only vertically.
Add an equal-widths constraint between the view inside the scroll view, and the root-level view of the view controller.
I just recently figured this out. Try doing this:
Make a scroll view
Put all of your labels and buttons into a stack view (If you don't know about stack views, check this out: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIStackView_Class_Reference/
Constrain the stack view's width and make sure the Allignment and Distribution are set to fill
Put the Stack View inside of the scroll view
Constrain the Scroll view to your hearts desire
Putting the labels and what you want in the scroll view should help with the width boundaries. Here's a picture of my successful scroll view. Hope this helps :)
In short, the contentsize is no effect while you use autolayout.
if you want you scrollview can scroll, uou should add a container inside scrollview and add origin subviews to the container.
For example, use snapkit (maybe some typos here):
you have a scrollview.set it's equal self.view's frame by autolayout
[import]then you add a containerView as scrollview's subview. set contraints:
make.edges.equalTo(scrollview) // mean its frame equal to scrollview
make.width.equalTo(self.view) // set width equal to self.view
make.height.equalTo(yourheight).priorityLow() // the actual height,if no changes,you can ingore .priorityLow()
add your sunviews to containerView,add the contraints must set to containerView,can't set to scrollview's.forexample,:
containerView.addSubView(myview)
myview.snp_makeConstraints { (make) -> Void in
make.left.equalTo(self.containerView)
make.top.equalTo(self.containerView)
make.right.equalTo(self.containerView)
make.height.equalTo(267)
}
Read this official doc -
Technical Note TN2154 UIScrollView And Autolayout.
I making a article detail view like Facebook.
This view have content(profile image, writer, date, content text) and comment write view.
So Top view is UIScrollview, Bottom view is UIView.
UIScrollView have UIImageview, UILabel*3,
UIView have UITextView, UIButton.
When touch UITextView in UIView, the keyboard comes up.
So UIScrollview will be smaller and UIView position will be moved.
And User will write text, UITextView line will be added so UIView Size will be extended.
Eventually UIScrollview and UIView height not Determinate.
How to set autolayout this view?
Instead of having UIView for textView and button, what i would suggest you is, just add one scrollView set its constraints as below
Then add a UIView as container view inside scroll view, (select scroll view go to Editor, select Embed In, and select View) and set its constraint as below
Now add your imageView, labels, textView and button one by one, and make sure your set imageView's top space to view and button's (which is at the bottom of screen) bottom space to view, and all other view's top space and bottom space to their nearest views, this way scroll view can easily determine the height required for it.
One last thing, when user click inside textView you might need to move scrollView upward in order to make textView visible to user while he is typing, to do this one easy solution is just download the library 'TPKeyboardAvoiding' from here add all classes to your project and once done, set your scrollView's custom class to 'TPKeyboardAvoidingScrollView'. Clean and run the project, it should work..
May try it:
What I say below is about constraint:
UIScrollView top, left, right equal self.view top, left, right
UIScrollView bottom equal UIView bottom
UIView left, right, bottom equal self.view left, right, bottom UIView height equal 200(you set it)
OK, when you UITextView is touched, set the UIView height constraint to what you want(maybe 300)
I think it works!