I need to display the layout I have in the picture in my app.
The view hierarchy is:
scroll view (scrollEnabled = true)
image view
label
webview (scrollEnabled = false)
table view (scrollEnabled = false, max amount of rows = 6)
The web view height is dynamically changed by it's delegate webViewDidFinishLoad.
func webViewDidFinishLoad(webView: UIWebView) {
webView.sizeToFit()
}
How can I set up the auto layout to move the table view below the web view?
First of all you need to add containerView in scrollView and then add subViews to containerView.
Below I’ve displayed the hierarchy you need to follow for displaying content in UIScrollView and the constraints you need to set.
scroll View (constraints :- leading,trailing,top,bottom)
Container View (constraints :- leading,trailing,top,bottom,widthsEqually to View,heightsEqually to View or height = 1000)
NOTE : If all subViews has specific height then there is no need to give height to ContainerView.
UIImageView (constraints :- leading,trailing,top,verticalSpacing,height)
UILabel (constraints :- leading,trailing,top,verticalSpacing,height)
UIWebView (constraints :- leading,trailing,top,verticalSpacing,height>=0)
UITableView (constraints :- leading,trailing,top,Bottom)
NOTE: give height to tableView if required. You will need to make changes in height constraint of UIWebView programmatically at run time based on your requirement.
For more reference please refer links below:
http://spin.atomicobject.com/2014/03/05/uiscrollview-autolayout-ios/
http://blog.surecase.eu/working-with-uiscrollview-in-storyboard-using-autolayout/
http://makeapppie.com/2014/12/11/swift-swift-using-uiscrollview-with-autolayout/
Related
I need to dynamically set a container height. This is in the event of using a container view with view controllers which may change.
let frame = viewController.view.systemLayoutSizeFitting(UILayoutFittingCompressedSize)
containerHeight.constant = frame.height
view.layoutIfNeeded()
I am using the above code for getting the required height of the new view controller so that I can set the container views height.
This seems to work fine on any view which doesn't contain a scroll view. If the view has a scroll view so for example I have a view with a title, tableview and button at the bottom of the tableview. The height calculated doesn't account for the tableview.
Is there anything special I need to do when calculating the height of a view which has a scroll view
how to expand the view width after loading ios?
I have a view that will be initialized with self.view.bounds
I want this view to have another frame after loading how can I do that?
FYI this view is a sub view of Scrollview.
So I am initializing a view, that is subview of a scroll view, inside a view.
If you are using storyboard and autolayout,
Update constants of width constrain of the view. You can create directly IBOutlet of the constraint and
int desiredWidth = 150;
_modifyViewWidthConstraint.constant = desiredWidth;
If the views are created programatically, then simply change the frame
modifyView.frame = CGRectMake(modifyView.frame.origin.x, modifyView.frame.origin.y,desiredWidth,modifyView.frame.size.height);
Keeping all its x,y and height same as previous.
If you are using Auto Layout on view and given width constant to view then change property of that constant,change relation from == to >= and change priority from 1000 to 250.Hope it will work you.
I'm developing a little app in Swift 2.0. I have a View with the following hierarchy:
Now, the elements placed in this view can't be displayed entirely in it, so I would like to use a ScrollView in order to be able to scroll all the content.
How I can embed all the content of my Viewto a new ScrollView? Can I do this programmatically by code?
UPDATE: There's an easier way to do this which I didn't know when I posted this answer
1) Go to the viewcontroller on the storyboard and click on something in it and press Command + A. This will select all the elements in the view.
2) Go to Editor -> Embed In -> Scroll View. This will embed all the labels, views, etc into a scrollView.
3) Select the scrollview that you just embedded. Press Control and drag it to the respective class file of the viewcontroller and create an outlet scrollView.
4) Add this to your viewDidLoad()
scrollView.contentSize = CGSizeMake(self.view.frame.width, self.view.frame.height+100)
Make sure the height for the contentSize is more than the size of your view.
ADDING SCROLLVIEW MANUALLY
1) Drag and drop a scrollview from the Object Library onto your viewcontroller in the storyboard and create an outlet to your program as 'scrollView'.
2) Click on your viewcontroller and go to the size inspector and note down the width and height.
3) Click on your scrollview and set the width and height the same as the viewcontroller. and set the X and Y values to 0
4) Click on the scrollView and drag it a little bit to the side
5) Press Command+A to select all the elements including scrollView. Press Command and click on the scrollView to deselect the ScrollView
6)You will have all the elements except the scrollView selected now. Now click and drag them into the scrollView.
7) Now click on the scrollView and set the X and Y values to 0 from the Size Inspector.
8) Add this to your viewDidLoad()
scrollView.contentSize = CGSizeMake(self.view.frame.width, self.view.frame.height+100)
Make sure the height for the contentSize is more than the size of your view.
That should create a scrollView for your view. Some of the elements might be in a slightly different position. You can easily fix them by moving them on your storyBoard.
It can be done even simpeler than ebby94's answer.
1) Go to the viewcontroller on the storyboard and click on something in it and press Command + A. This will select all the elements in the view.
2) Go to Editor -> Embed In -> Scroll View. This will embed all the labels, views, etc into a scrollView.
3) Set the constraints of the Scroll View to the View's edges.
And you're good to go! No need for an outlet.
If you are using Snapkit or creating programmatically.
class ScrollViewController: UIViewController {
lazy var contentViewSize = CGSize(width: self.view.frame.width, height: self.view.frame.height + 320) //Step One
lazy var scrollView : UIScrollView = {
let view = UIScrollView(frame : .zero)
view.frame = self.view.bounds
view.contentInsetAdjustmentBehavior = .never
view.contentSize = contentViewSize
view.backgroundColor = .white
return view
}()
lazy var containerView : UIView = {
let view = UIView()
view.frame.size = contentViewSize
view.backgroundColor = .white
return view
}()
override func viewDidLoad() {
self.view.addSubview(scrollView)
self.scrollView.addSubview(containerView)
//Now Set Add your Constraints in the container View.
}
}
Above accepted answer explanation is enough to achieve the scroll view but I would prefer to create my complete application programatically and I don't use storyboards in my project. This code is for the folks who don't prefer to use storyboards.
Explanation
Step One: Determine your content Size. Here I am taking Exact width and adding 320 more to the height of the screen.
Step Two: Create a scroll view and add desire behaviour of the scroll view. Now, the contentSize of the scroll view should be same as the contentSize you've created above at step one.
By Following Step one and Step Two. You Will be able to set a scroll view on the top of the view. But If you want to add a stretching behaviour then You should follow Step Three
Step Three: Create a container view of the same size of the contentView which you've calculated in step one and set it to the frame of the containerView. By doing this you'll be able to achieve stretching header and footer behaviour in your screen.
Please read make sure to add constraints in the same order as it is set.
Answer Edits are welcome.
I had the same issue. I needed to add scrollview to the existing view.But my main container view has a lots of view inside it. And they were connected to each other. So i was afraid. Finally i did it. the process given below.
Duplicate your View (root View). For this first select the root view then press Command + D
Now delete all the child view view inside the root view
Now add a scroll view to the root view and set constraint to 0,0,0,0
Now add the duplicate(That you duplicated) view to the scroll view and set constraints to 0,0,0,,0 also set the height that you want.
Set width of the duplicate view by equal width with the root view.
Now select the viewController, go the size inspector, select free form size. Then set the height that you entered with duplicate view.
You have almost done. Now you have to connect the child view with outlet or action that you gave in the viewController class.
Thats all.
Selecting all elements and embedding scroll view (editor->embed in->scrollView) works fine.
Adding constraint is much more easy by selecting the constraint warning (Add Missing Constraints).
It's simple. Command A and Command X to specific view controller in StoryBoard. After that take scroll view. On scroll view, just take one view with view controller view height and width equal to scroll View width. Again do Command V and rearrange the constraints. Your problem will be solved.
I have a UIScrollView, inside this UIScrollView I have a UIView and inside the UIView I have some UITextField's, some UILabel's and at the bottom there is a UITableView.
I want the UITableView to fit it's content height, the UIView to fit it's content height and the UIScrollView to fit it's content height.
The UITableView height might change as I add / remove cells from it during usage.
What is the best way to handle it using AutoLayout?
- UIViewController
-- UIView
--- UIScrollView
---- UIView
----- UILabel
----- UITextField
----- UITextView
----- UITableView (at the bottom of the superview)
or as in the xib:
The best way to implement this is to scrap the hierarchy that you have now and do the following...
- UIViewController (or UITableViewController)
--- UITableView
----- UIView (as the tableView.tableHeaderView)
------- UILabel
------- UITextField
------- UITextView
----- Rest of the cells for the table view.
The tableView.tableHeaderView is a single (not reusable, concrete) view that is placed at the top of the content of the table view and scrolls with the content of the table view. It doesn't stick to the top of the screen like a section header view does.
This will allow you to delete the scroll view and place everything inside the table view and still doesn't change the methods that you are using to populate the cells as that remains untouched.
#Jan Greve is correct. But if you still want to do it
Set Bottom Space to Container constraint between the Table View and its super view to 0
Increase/decrease the height constraint of the Table View with each insert/delete (You will have to do this programmatically)
Set the content offset of the scrollview to the new view height
The best part of AutoLayout is now you don't have to worry about UIScrollView content size.
If you set all constraints properly(without any warnings) AutoLayout manage content size for scrollView itself.
Set all subview's constraints but don't add height and width constraints.
And for contentSize add bottom constraint of inner view (subview of scrollview) to UIScrollView. This will increaser scrollView content size and height as per inner view expand or shrink.
For more details: I asked question for same, you can check it. You can find code in question itself.
You can set a fixed height to the tableView and link the constraint to an outlet. Then you'd need to override viewDidLayoutSubviews() in order to set the height dynamically based on the contentSize of the table:
#IBOutlet weak var dynamicTVHeight: NSLayoutConstraint!
internal override func viewDidLayoutSubviews() {
let height = min(self.view.bounds.size.height, self.tableView.contentSize.height)
self.dynamicTVHeight.constant = height
self.view.layoutIfNeeded()
}
After so much trouble i am able to scroll the scrollview, and it is working fine. Now my question is how to set the dynamic height of scrollview and main view after adding view inside scroll view. As adding height from IB make it static and inside content height may very.
steps that i followed are.
Added a uiview controller inside my storyboard.
Then inside this uiview added one uiscrollview.
Set the height of the main view to 1000 and scrollview to 1000.
Selected the uiscrollview and reset it to suggested constraint.
In this uiscrollview i added many labels, uiviews, textviews, etc programatically.
Now the main isuue is this 1000 height that i set in step 3 is static and the content is dynamic, so how to set height dynamically. and also is it necessary to follow step 4, when i am doing it programatically.
If you know the new subview's height, you can change the frame size by
// Add your subview to scroll view
...
// Set new height
CGRect newScrollFrame;
newScrollFrame.origin = MyScrollView.frame.origin;
newScrollFrame.size = CGSizeMake(MyScrollView.frame.size.width, MyScrollView.frame.size.height + MyNewSubView.frame.size.height);
MyScrollView.frame = newScrollFrame;