I used storyboard with autolayout enable. I put a UIScrollView in storyboard. Then drag a UITableView over the scrollview. I set the table view's width bigger than the scroll view's width. I then set the constraints with the trailing space to scrollview with a negative number and storyboard fill all other constraints without error. The structure look like:
UIView
UIScrollView
UITableView
in code, I set the scroll view content size:
self.scrollView.contentSize = CGSizeMake(500, 400);
the size matches table view's size. But it doesn't work. The table view will not scroll horizontally. What I am doing wrong and how to make a UITableView scroll horizontally. I mean the whole table, not the each cell scroll horizontally. Thanks for your help.
Related
Using Storyboard, in UIViewController using UIScrollView, UIView as content view
Scrollview Constraints - top, bottom, left, right
UIView as contentview constraints - top, bottom, left, right, equal width height to ViewController's View.
I am using these constraints, can anyone please help me out why button is not calling?
The button is not clickable because it is below the frame of the content view. You need to remove all auto layout constraints from your content view (the UIView inside the scrollview).
Then you can add all the objects that you need to add to the content view and set the height of the content view according to the height of the content.
So lets say that you calculated a height of 1000 for the content of the objects in the scroll view. You would then need to set the frame of the content view like this:
contentView.frame = CGRectMake(0,0,scrollView.frame.size.width, 1000);
And don't forget to set the contentSize for the scrollview so that the scrollview knows how much room it needs to scroll.
Just now found the answer with removing any autolayout constraints, for content view we have to set constraints like below:
Top, bottom, left, right
Align CenterX - here we have to set the content view height then for that constraint we have to set constant as scrollview content size height
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()
}
I have a ViewController. In it I put ScrollView with the View(contentView). Later I drag from contentView to View and set Equal Height. Now it scrolls, but not fully.
As you see there are it has continue below the textView, but it
doesn't scrolls. How can I fix it?
UIScrollView is able to automatically calculate it's content height and width, but you need to help it with this.
To do so you need to:
Bound contentView (in your case) to all sides of superview (which is Scroll View).
Let contentView to calculate it's sizes. Here is a small mistake in your approach. You've set height of the contentView equal to View's height. So basically Scroll View's contentSize.height is the same as View's height. Which is not really what you want with dynamic content.
Usually you want to set width of the contentView equal to View's width and do not set contentView's height. Instead you want to bind subviews of contentView to their superview in such a way that their superview (contentView) will calculate it's height automatically.
In your case I would bind:
pizza.jpg to left-top-right of superview (height of pizza.jpg will be set from intrinsic image size);
SAMPLE TITLE label - left-right to superview; top to pizza.jpg image;
Text View - left-bottom-right to superview; top to SAMPLE TITLE label; set a fixed height.
In this case contentView will define needed height by itself. Scroll View will set it's contentSize accordingly.
And your screen will be able to scroll vertically (it should be) ;)
You need to set the contentsize of the scrollview. Use the below code to do that:
func viewDidLayoutSubviews()
{
super.viewDidLayoutSubviews()
self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, self.contentView.frame.size.height);
}
To use Autolayout with UIScrollView is tricky.
In your code you have to update height constraint for your contentView by calculating height of subviews of contentView and that will automatically update the contentSize for your ScrollView and you can scroll through all subviews.
For more info to use Autolayout+UIScrollView your can read this.
According to this link (thanks to this Matt's answer first), UIScrollView acts differently with AutoLayout than the other views.
Subviews of a scrollView set their constraints from the contentView of the scrollView and not the scrollview directly. This allows the content to scroll.
So :
Add a UIView to your scrollView, this will represent the contentView of your scrollView. Add constraints to top, bottom, trailing, leading from the view to its superView
Interface Builder complains. Here you see the different between a basic view and a scrollView. The reason is a contentView has to be fill to know its size. So add a equal width from the contentView to the scrollView
The contentView knows now its width but not its height. So add your labels and your UIImage as subviews of the contentView. Add constraints from bottom to the top. Don't miss to add a height constraint to the UIImageView.
It should look like this :
Hope this helps
Read this (from Matt once again) for further informations
I'm trying to make layout inside scrollview using this one tutorial link
And get the following result link
It will be appreciated for any advices or tutorial links. It needs only vertical scrolling
I am sure there must be other ways to do this but a quick fix is :
1.) Create a width constraint on ContentView in Storyborad.
2.) IBOutlet that widthContraint and set its value to the view frame width in viewDidLoad.
Suppose the name of the constraint outlet is contentViewWidthContraint.
contentViewWidthContraint.constant = self.view.bounds.size.width;
Another alternative to do so from Storyboard, is to fix the Contentview width to the view's width from the storyboard or to the Scrollview, if Scrollview already has a Equal width contraint with superview . Add the "Equal Width" contraint from Contentview to either self.view or to Scrollview (if scrollview, already has the width contraint)
Have you set up the "ContentView" width to match with the scroll view width? I had the same problem and I fixed with "Equal Widths".
"Equal Widths" will tell to your "ContentView" to use the same width of the "Scroll View", which should be fitting the screen if you have set up the constrain properly.
You can do this easily on the storyboard.
Drag and drop, with right click (important!!!), from "ContentView" to "ScrollView"
Release the click, you will be prompted with a menu, select "Equal Widths".
This should fix your problem using the scrollview with AutoLayout from Storyboard editor.
You can find a full tutorial how to use ScrollView with Autolayout and Storyboard here.
I hope this is useful for you :)
In the Storyboard set the width of the elements contained in your UIScrollView equal to the width of this UIScrollView (by selecting all elements and the UIScrollView holding in the panel on the left of your Storyboard and then setting the 'Equal Widths' constraint under 'Pin' on the bottom of your Storyboard). Just pinning the right sides of the elements to that of the UIScrollView won't work as it will adjust the size of its "display view" to the width of the largest element and if this is smaller than the width of the UIScrollView all elements will just appear aligned to its left side.
There is also another possibility that offers a very good result.
You can mark a checkbox:
O programmatically:
scrollView.alwaysBounceVertical = true
Try to set it's width to 0 & height equal to content size like this:
self.scrollView.contentSize = CGSizeMake(0, self.scrollView.contentSize.height);
This will work as you want. Try it & tell if still facing any issue.
For disabling the horizontal scroll, you can set the content size in the -(void)scrollViewDidScroll method.
[self.scrollView setContentOffset: CGPointMake(0, self.scrollView.contentOffset.y)];
self.scrollView.directionalLockEnabled = YES;
This is because scroll view have no idea where your content should end.
But when at least one item inside your scroll view has its "trailing space" constraint attached to a view outside the scroll view (usually a view the scroll view is sitting in or some other view of a higher level, which "knows" its width) - the scroll view will automatically get an idea about your wanted width and won't scroll horizontally (unless that trailing constraint implies having your content outside the screen).
Better if all items inside scroll view have their "trailing space" constraints connected either to each other or to a view outside the scroll view. But not the scroll view itself.
No additional code or extra constraints needed for this to work.
Too set UIScrollView constraints as like below code so it will occupied whole screen.Not exceed the screen size.
Leading Space = 0 from mainView
Top Space = 0 from mainView
Bottom Space = 0 from mainView
Trailing Space = 0 from mainView
You need to set the width of UIScrollView equal to or less than the width of your Parent View. Two ways to do it:
1) You can do this in Storyboard via layout constraints
2) You can do this programatically:
self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, self.scrollView.contentSize.height);
I have one screen where I have added 1 scroll view on self view. Tab bar and navigation bar both are there and for iPhone 4 view height is 455.I have added more content on scroll view.the height of scroll view and self view is same.but when i am unable to set content size for scroll view.even i set too it is not working.Please help me.
Thanks
Here is how to set up the size of the contentView in Auto Layout:
Add a view to your scrollView. This should be the only top level view on your scrollView and it will serve as your contentView.
Constrain the left, top, right, and bottom edges of this contentView to the left, top, right, and bottom of the scrollView with offsets of 0.
To size the contentView, add width and height constraints to the contentView. If you want it to scroll, the width and height must be larger than the width and height of the scrollView itself. If you only want to scroll vertically, set the width of the contentView to be equal to the width of the scrollView.