I am very new to Swift and developing on ios but I cannot find a way to make the UIScrollView to scroll down and stay down. I have been trying tons of tutorials over this and still nothing. I have a ContentView element inside of my ScrollView element. This ContentView has all of my boxes that I want it to scroll through but it does not scroll. It does though bounce if that makes any difference...can anyone send me in the right direction?
Try setting the contentSize in viewDidLayoutSubviews
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
scrollView.contentSize = CGSize(width: 375, height: 1500)
}
I finally figured it out after 2 days and it was very simple. All I did was set the scrollView to the size of the screen but then set the content view height at 1500px and it started working. Thanks everyone!
Sounds like uou may not have set the contentSize for your scroll view. To do that if you're not using Auto layout:
scrollView.contentSize = // The size of your content.
If you are using Auto layout you need to make sure you have NSLayoutConstraints from each edge of your content to each corresponding edge of your UIScrollView. By doing this the content size of your UIScrollView will be set automatically.
Hope that helps.
Just wanted to add a note to FreeTheStudentsAnswer in case anyone had a similar issue to me - I set the scrollView to the size of the screen and then set the content view height at a larger value and it started working only when I set these in the viewDidAppear instead of viewDidLoad. Not sure if that will help anyone, but that fixed my issue
In scrollview, scroll happens only if the scrollview has enough space to scroll its content.
You said the scrollview and its content view have the same dimensions.
Then it won't scroll.
Scrollview.contentSize should be at least double the size of scrollview if you want it to scroll.
Hint: scrollview dimension should not be greater than the iPhone screen size. And scrollview content size should be greater than the scrollview.
Scroll view scrolls through its contentview.
SWIFT 4.0 Update
#IBOutlet weak var myScrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
myScrollView.alwaysBounceVertical = true
myScrollView.alwaysBounceHorizontal = true
myScrollView.isScrollEnabled = true
myScrollView.contentSize = CGSize(width: 375, height: 1000)
}
Try This
1.scrollView.bounds = YES;
2.scrollView.contentSize = CGSize(width: self.view.frame.size.width, height: YourContentView.frame.size.height);
Related
I am working with Swift 4.0 where I want UITableview with both vertical and horizontal scroll.
I have set contentSize of my UITableview. If I change the frame of UITableview programmatically then contentSize of UITableview is not working.
If the frame is same as it is set using autolayout then the contentSize of UITableview is working fine.
Below is the code I have tried :
let height : CGFloat = CGFloat((self.transactionArr.count*60)+70)
let width = self.view.frame.size.width*2
self.tblWidth.constant = self.view.frame.size.width
self.view.updateConstraintsIfNeeded()
self.tableView.contentSize = CGSize(width: width, height: height)
Don't hack UITableView - it is designed to scroll only vertically. Check out UICollectionView instead, it is designed for both vertical and horizontal scrolling (although you can make it scroll just one way if that's your need) - docs, or a tutorial.
You can put your tableview in a ScrollView. Make sure your ScrollView size is the same with tableview.
set your ScrollView width bigger than your container view and you can scroll your tableview horizontally.
I have a viewController into which I dragged a tableView, but when I load data in the tableView I get a scroll, what I want is to extend this tableView to its height to fill its superView. I tried to resize the tableView by setting tableView.frame.height = tableView.contentSize.height in viewDidAppear and it worked but I don't get a scroll in the superView, the tableView just got expanded and the content is down the view but I cant scroll, I tried to put this tableView inside a scrollView but still the same thing, what can I do?
yourTableview.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height)
Basically what you did was adjust the height of the tableView to be is the height if its content rather than the height of the screen (the content height is larger than the screen)
The table should carry the height of the screen (or any height you want) and if your content is bigger than the frame of your tableView it will automatically have the scrolling enabled.
Hope this helps!
If you want your scrollview to be scrollable, you need to indicate its contentSize by dynamically calculating the height of its nested components:
scrollView.isScrollEnabled = true
scrollView.contentSize = imageView.frame.height + tableview1.frame.height + tableview2.frame.height + netLabel.frame.height
Notice that you may also have to include your margins' height
I just needed to add the constraint of height of my table as an Outlet like this #IBOutlet weak var myConstraint: NSLayoutConstraint!, and the do myConstraint.constant = myTable.contentSize.height in viewDidAppear
I'm attempting to make a UIScrollView only allow zooming in the horizontal direction. The scroll view is setup with a pure autolayout approach. The usual approach is as suggested in a number of Stack Overflow answers (e.g. this one) and other resources. I have successfully used this in apps before autolayout existed. The approach is as follows: in the scroll view's content view, I override setTransform(), and modify the passed in transform to only scale in the x direction:
override var transform: CGAffineTransform {
get { return super.transform }
set {
var t = newValue
t.d = 1.0
super.transform = t
}
}
I also reset the scroll view's content offset so that it doesn't scroll vertically during the zoom:
func scrollViewDidZoom(scrollView: UIScrollView) {
scrollView.contentSize = CGSize(width: scrollView.contentSize.width, height: scrollView.frame.height)
scrollView.contentOffset = CGPoint(x: scrollView.contentOffset.x, y: 0.0)
}
This works very nicely when not using autolayout:
However, when using autolayout, the content offset ends up wrong during zooming. While the content view only scales in the horizontal direction, it moves vertically:
I've put an example project on GitHub (used to make the videos in this question). It contains two storyboards, Main.storyboard, and NoAutolayout.storyboard, which are identical except that Main.storyboard has autolayout turned on while NoAutolayout does not. Switch between them by changing the Main Interface project setting and you can see behavior in both cases.
I'd really rather not switch off autolayout as it solves a number of problems with implementing my UI in a much nicer way than is required with manual layout. Is there a way to keep the vertical content offset correct (that is, zero) during zooming with autolayout?
EDIT: I've added a third storyboard, AutolayoutVariableColumns.storyboard, to the sample project. This adds a text field to change the number of columns in the GridView, which changes its intrinsic content size. This more closely shows the behavior I need in the real app that prompted this question.
Think I figured it out. You need to apply a translation in the transform to offset the centering UIScrollView tries to do while zooming.
Add this to your GridView:
var unzoomedViewHeight: CGFloat?
override func layoutSubviews() {
super.layoutSubviews()
unzoomedViewHeight = frame.size.height
}
override var transform: CGAffineTransform {
get { return super.transform }
set {
if let unzoomedViewHeight = unzoomedViewHeight {
var t = newValue
t.d = 1.0
t.ty = (1.0 - t.a) * unzoomedViewHeight/2
super.transform = t
}
}
}
To compute the transform, we need to know the unzoomed height of the view. Here, I'm just grabbing the frame size during layoutSubviews() and assuming it contains the unzoomed height. There are probably some edge cases where that's not correct; might be a better place in the view update cycle to calculate the height, but this is the basic idea.
Try setting translatesAutoresizingMaskIntoConstraints
func scrollViewDidZoom(scrollView: UIScrollView) {
gridView.translatesAutoresizingMaskIntoConstraints = true
}
In the sample project it works. If this is not sufficient, try creating new constraints programmatically in scrollViewDidEndZooming: might help.
Also, if this does not help, please update the sample project so we can reproduce the problem with variable intrinsicContentSize()
This article by Ole Begemann helped me a lot How I Learned to Stop Worrying and Love Cocoa Auto Layout
WWDC 2015 video
Mysteries of Auto Layout, Part 1
Mysteries of Auto Layout, Part 2
And so luckily, there's a flag for that. It's called translatesAutoResizingMask IntoConstraints [without space].
It's a bit of a mouthful, but it pretty much does what it says. It makes views behave the way that they did under the Legacy Layout system but in an Auto Layout world.
Although #Anna's solution works, UIScrollView provides a way of working with Auto Layout. But because scroll views works a little differently from other views, constraints are interpreted differently too:
Constraints between the edges/margins of scroll view and its contents attaches to the scroll view's content area.
Constraints between the height, width, or centers attach to the scroll view’s frame.
Constraints between scroll view and views outside scroll view works like an ordinary view.
So, when you add a subview to the scroll view pinned to its edges/margins, that subview becomes the scroll view's content area or content view.
Apple suggests the following approach in Working with Scroll Views:
Add the scroll view to the scene.
Draw constraints to define the scroll view’s size and position, as normal.
Add a view to the scroll view. Set the view’s Xcode specific label to Content View.
Pin the content view’s top, bottom, leading, and trailing edges to the scroll view’s corresponding edges. The content view now defines
the scroll view’s content area.
(...)
(...)
Lay out the scroll view’s content inside the content view. Use constraints to position the content inside the content view as normal.
In your case, the GridView must be inside the content view:
You can keep the grid view constraints that you have been using but, now, attached to content view. And for the horizontal-only zooming, keep the code exactly as it is. Your transform overriding handle it very well.
I'm not sure if this satisfies your requirement of 100% autolayout, but here's one solution, where the UIScrollView is set with autolayout and gridView added as a subview to it.
Your ViewController.swift should look like this:
// Add an outlet for the scrollView in interface builder.
#IBOutlet weak var scrollView: UIScrollView!
// Remove the outlet and view for gridView.
//#IBOutlet var gridView: GridView!
// Create the gridView here:
var gridView: GridView!
// Setup some views
override func viewDidLoad() {
super.viewDidLoad()
// The width for the gridView is set to 1000 here, change if needed.
gridView = GridView(frame: CGRect(x: 0, y: 0, width: 1000, height: self.view.bounds.height))
scrollView.addSubview(gridView)
scrollView.contentSize = CGSize(width: gridView.frame.width, height: scrollView.frame.height)
gridView.contentMode = .ScaleAspectFill
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return gridView
}
func scrollViewDidZoom(scrollView: UIScrollView) {
scrollView.contentOffset = CGPoint(x: scrollView.contentOffset.x, y: 0.0)
scrollView.contentSize = CGSize(width: scrollView.contentSize.width, height: scrollView.frame.height)
}
I have a UIScrollView which contains many UIImageViews, UILabels, etc... the labels are much longer that the UIScrollView, but when I run the app, I cannot click and scroll down...
Why might this be?
Thanks
It's always good to show a complete working code snippet:
// in viewDidLoad (if using Autolayout check note below):
UIScrollView *myScrollView;
UIView *contentView;
// scrollview won't scroll unless content size explicitly set
[myScrollView addSubview:contentView];//if the contentView is not already inside your scrollview in your xib/StoryBoard doc
myScrollView.contentSize = contentView.frame.size; //sets ScrollView content size
Swift 4.0
let myScrollView
let contentView
// scrollview won't scroll unless content size explicitly set
myScrollView.addSubview(contentView)//if the contentView is not already inside your scrollview in your xib/StoryBoard doc
myScrollView.contentSize = contentView.frame.size //sets ScrollView content size
I have not found a way to set contentSize in IB (as of Xcode 5.0).
Note:
If you are using Autolayout the best place to put this code is inside the -(void)viewDidLayoutSubviews method .
If you cannot scroll the view even after you set contentSize correctly,
make sure you uncheck "Use AutoLayout" in Interface Builder -> File Inspector.
You need to set the contentSize property of the scroll view in order for it to scroll properly.
If you're using autolayout, you need to set contentSize in viewDidLayoutSubviews in order for it to be applied after the autolayout completes.
The code could look like this:
-(void)viewDidLayoutSubviews
{
// The scrollview needs to know the content size for it to work correctly
self.scrollView.contentSize = CGSizeMake(
self.scrollContent.frame.size.width,
self.scrollContent.frame.size.height + 300
);
}
The answer above is correct - to make scrolling happen, it's necessary to set the content size.
If you're using interface builder a neat way to do this is with user defined runtime attributes. Eg:
Try to resize the content size to huge numbers. I couldn't understand why my scroll view doesn't scroll even when its content size seems to be bigger than control size. I discovered that if the content size is smaller than needed, it doesn't work also.
self.scrollView.contentSize = CGSizeMake(2000, 2000);
Instead of 2000 you can put your own big numbers. And if it works, it means that your content size is not big enough when you resize.
The delegate is not necessary for scroll view to work.
Make sure you have the contentSize property of the scroll view set to the correct size (ie, one large enough to encompass all your content.)
Uncheck 'Use Autolayout' did the trick for me.
Environment:
xCode 5.0.2
Storyboards
ios7
In my case I had to set delaysContentTouches to true because the objects inside the scrollView were all capturing the touch events and handling themselves rather than letting the scrollView itself handle it.
Set contentSize property of UIScrollview in ViewDidLayoutSubviews method. Something like this
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
scrollView.contentSize = CGSizeMake(view.frame.size.width, view.frame.size.height)
}
if you are getting a message (IOS8 / swift) that viewDidLayoutSubviews does not exist, use the following instead
override func viewDidAppear(animated: Bool)
This fixed it for me
The idea of why scroll view is not scrolling because you set the content size for scrolling less than the size of the scroll view, which is wrong.
You should set the content size bigger than the size of your scroll view to navigate through it while scrolling.
The same idea with zooming, you set the min and max value for zooming which will applied through zooming action.
welcome :)
One small addition, all above are the actual reasons why your scroll view might not be scrolling but sometimes mindlessly this could be the reason specially when scrollview is added through code and not IB, you might have added your subviews to the parent view and not to the scrollview this causes the subview to not scroll
and do keep the content size set and bigger than parent view frame (duhh!!)
I made it working at my first try. With auto layout and everything, no additional code. Then a collection view went banana, crashing at run time, I couldn't find what was wrong, so I deleted and recreated it (I am using Xcode 10 Beta 4. It felt like a bug) and then the scrolling was gone. The Collection view worked again, though!
Many hours later.. this is what fixed it for me. I had the following layout:
UIView
Safe Area
Scroll view
Content view
It's all in the constraints. Safe Area is automatically defined by the system. In the worst case remove all constraints for scroll and content views and do not have IB resetting/creating them for you. Make them manually, it works.
For Scroll view I did: Align Trailing/Top to Safe Area. Equal Width/Height to Safe area.
For Content view I did: Align Trailing/Leading/Top/Bottom to Superview (the scroll view)
basically the concept is to have Content view fitting Scrollview, which is fitting Safe Area.
But as such it didn't work. Content view missed the height. I tried all I could and the only one doing the trick has been a Content view height created control-dragging Content view.. to itself. That defined a fixed height, which value has been computed from the Size of the the view controller (defined as freeform, longer than the real display, to containing all my subviews) and finally it worked again!
Add the UIScrollViewDelegate and adding the following code to the viewDidAppear method fixed it for me.
#interface testScrollViewController () <UIScrollViewDelegate>
-(void)viewDidAppear:(BOOL)animated {
self.scrollView.delegate = self;
self.scrollView.scrollEnabled = YES;
self.scrollView.contentSize = CGSizeMake(375, 800);
}
My issue was resolved by:
setting the contentSize on the scrollView to a large height
BUT also I had to fix top and/or bottom constraints on views within the scrollView, which meant the scroll indicators showed on screen but the content did not scroll
Once I removed top and/or bottom constraints bound to the safe area and/or superview, the views inside the scrollView could scroll again and didn't stay fixed to the top of bottom of the screen!
Hope this stops someone else from hours of pain with this particular issue.
yet another fun case:
scrollview.superview.userInteractionEnabled must be true
I wasted 2+hrs chasing this just to figure out the parent
is UIImageView which, naturally, has userInteractionEnabled == false
Something that wasn't mentioned before!
Make sure your outlet was correctly connected to the scrollView! It should have a filled circle, but even if you have filled circle, scrollView may not been connected - so double check! Hover over the circle and see if the actual scrollview gets highlighted! (This was a case for me)
//Connect below well to the scrollView in the storyBoard
#property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
Alot of the time the code is correct if you have followed a tutorial but what many beginners do not know is that the scrollView is NOT going to scroll normally through the simulator. It is suppose to scroll only when you press down on the mousepad and simultaneously scroll. Many Experienced XCode/Swift/Obj-C users are so use to doing this and so they do not know how it could possibly be overlooked by beginners. Ciao :-)
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(scrollView)
// Do any additional setup after the view
}
override func viewWillLayoutSubviews(){
super.viewWillLayoutSubviews()
scrollView.contentSize = CGSize(width: 375, height: 800)
}
This code will work perfectly fine as long as you do what I said up above
If none of the other solutions work for you, double check that your scroll view actually is a UIScrollView in Interface Builder.
At some point in the last few days, my UIScrollView spontaneously changed type to a UIView, even though its class said UIScrollView in the inspector. I'm using Xcode 5.1 (5B130a).
You can either create a new scroll view and copy the measurements, settings and constraints from the old view, or you can manually change your view to a UIScrollView in the xib file. I did a compare and found the following differences:
Original:
<scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" directionalLockEnabled="YES" bounces="NO" pagingEnabled="YES" showsHorizontalScrollIndicator="NO" showsVerticalScrollIndicator="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Wsk-WB-LMH">
...
</scrollView>
After type spontaneously changed:
<view clearsContextBeforeDrawing="NO" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" customClass="UIScrollView" id="qRn-TP-cXd">
...
</view>
So I replaced the <view> line with my original <scrollView> line.
I also replaced the view's close tag </view> with </scrollView>.
Be sure to keep the id the same as the current view, in this case: id="qRn-TP-cXd".
I also had to flush the xib from Xcode's cache by deleting the app's derived data:
Xcode->Window->Organizer->Projects, choose your project, on the Derived Data line, click Delete...
Or if using a device:
Xcode->Window->Organizer->Device, choose your device->Applications, choose your app, click (-)
Now clean the project, and remove the app from the simulator/device:
Xcode->Product->Clean
iOS Simulator/device->press and hold the app->click the (X) to remove it
You should then be able to build and run your app and have scrolling functionality again.
P.S. I didn't have to set the scroll view's content size in viewDidLayoutSubviews or turn off auto layout, but YMMV.
If your scrollView is a subview of a containerView of some type, then make sure that your scrollView is within the frame or bounds of the containerView. I had containerView.clipsToBounds = NO which still allowed me see the scrollView, but because scrollView wasn't within the bounds of containerView it wouldn't detect touch events.
For example:
containerView.frame = CGRectMake(0, 0, 200, 200);
scrollView.frame = CGRectMake(0, 200, 200, 200);
[containerView addSubview:scrollView];
scrollView.userInteractionEnabled = YES;
You will be able to see the scrollView but it won't receive user interactions.
adding the following code in viewDidLayoutSubviews worked for me with Autolayout. After trying all the answers:
- (void)viewDidLayoutSubviews
{
self.activationScrollView.contentSize = CGSizeMake(IPHONE_SCREEN_WIDTH, 620);
}
//set the height of content size as required
The straightforward programmatically way
To wrap it up
Create a UIScrollView
private lazy var scrollView: UIScrollView = {
let scrollView = UIScrollView()
scrollView.translatesAutoresizingMaskIntoConstraints = false
return scrollView
}()
Use a Single Child View to Hold All of Your Content Subviews
private lazy var contentView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
Add your views
contentView.addSubview(firstSubView)
contentView.addSubview(lastSubView)
scrollView.addSubview(contentView)
view.addSubview(scrollView)
Usually, you only want your content to scroll in one direction. In most cases to scroll vertically. Therefore set the width of the content view to be the width of the scroll view.
NSLayoutConstraint.activate([
contentView.widthAnchor.constraint(equalTo: scrollView.widthAnchor)
Attach four constraints (top, bottom, left, right) from our single content view to the scroll view.
contentView.topAnchor.constraint(equalTo: scrollView.topAnchor),
contentView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
contentView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
contentView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
Make sure you have constraints attached to all four sides of the content view so that it will expand to the size of your content.
// After Adding your subviews to the contentView make sure you've those two constraints set:
firstSubView.topAnchor.constraint(equalTo: contentView.topAnchor),
.
.
.
lastSubView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
])
Reference: Using UIScrollView with Auto Layout in iOS
After failing with the provided answers in this thread, I stumbled upon this article with the solution.
There are two things not intuitive about setting up the scrollview with autolayout:
The constraints you set up as margin between the contentview and scrollview do not influence the size of the contentview. They really are margins. And to make it work, the contentview should have a fixed size.
The trick to the fixed size is that you can set the width of the contentview equal to that of the scrollview's parent. Just select both views in the tree on the left and add the equal widths constraint.
This is the gist of that article. For a complete explanation, including illustrations, check it out.
I found that with this AutoLayout issue... if I just make the ViewController use UIView instead of UIScrollView for the class... then just add a UIScrollView myself... that it works.
I had the same issue in IB.
After setting the leading, trailing, top and bottom of the scrollView to its superView. I made the following changes to make the containerView scrollable, which worked.
To make the scrollView only scroll on horizontal direction make the constraint with scrollView's centerY = ContainerView's centerY
and to make it vertically scrollable make the scrollView's centerX = ContainerView's centerX
You don’t have to set the content size of the scroll view.
Technical Note TN2154
In case someone made the same mistake like me, I'd like to share my case.
In my case, I mistakenly add a constraint to one of the subviews of scrollview which makes the subview's space to the topLayoutGuide fixed, thus it's location can't be changed, so the scrollview can't be scrolled.
I have a UIView like iPhone's Springboard. I have created it using a UIScrollView and UIButtons. I want to disable horizontal scrolling on said scrollview. I want only vertical scrolling. How do I accomplish this?
You have to set the contentSize property of the UIScrollView. For example, if your UIScrollView is 320 pixels wide (the width of the screen), then you could do this:
CGSize scrollableSize = CGSizeMake(320, myScrollableHeight);
[myScrollView setContentSize:scrollableSize];
The UIScrollView will then only scroll vertically, because it can already display everything horizontally.
UPDATED: (After #EranMarom pointed out on his comment)
You can stop horizontal scrolling or vertical scrolling in the ScrollViewDelegate Method.
Here it is how,
Stops Horizontal Scrolling:
If you want to scroll horizontally, then you need to increase the contentOffset.x. Preventing that stops the scrollview scroll in horizontal direction.
- (void)scrollViewDidScroll:(UIScrollView *)sender {
sender.contentOffset.x = 0.0
}
Stops Vertical Scrolling:
If you want to scroll vertically, then you need to increase the contentOffset.y. Preventing that stops the scrollview scroll in vertical direction.
- (void)scrollViewDidScroll:(UIScrollView *)sender {
sender.contentOffset.y = 0.0
}
Above code prevents the changes in x and y of a scrollview contentOffset and it leads to stop the scrolling in scrollViewDidScroll: method.
since iOS7 use
self.automaticallyAdjustsScrollViewInsets = NO;
//and create you page scroller with 3 pages
self.pageView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
[self.pageView setContentSize:CGSizeMake(self.view.frame.size.width*3, self.view.frame.size.height)];
[self.pageView setShowsVerticalScrollIndicator:NO];
[self.pageView setPagingEnabled:YES];
[self.view addSubview:self.pageView];
Swift solution
Create two outlets, one for your view and one for your scroll view:
#IBOutlet weak var myView: UIView!
#IBOutlet weak var scrollView: UIScrollView!
Then in your viewDidLayoutSubviews you can add the following code:
let scrollSize = CGSize(width: myView.frame.size.width,
height: myView.frame.size.height)
scrollView.contentSize = scrollSize
What we've done is collected the height and width of the view and set the scrollViews content size to match it. This will stop your scrollview from scrolling horizontally.
More Thoughts:
CGSizeMake takes a width & height using CGFloats. You may need to use your UIScrollViews existing height for the second parameter. Which would look like this:
let scrollSize = CGSize(width: myView.frame.size.width,
height: scrollView.contentSize.height)
In my case, with Swift 4.2 you can use:
Disable vertical scroll:
func scrollViewDidScroll(_ scrollView: UIScrollView) {
scrollView.contentOffset.y = 0.0
}
Disable horizontal scroll:
func scrollViewDidScroll(_ scrollView: UIScrollView) {
scrollView.contentOffset.x = 0.0
}
In my case the width of the contentView was greater than the width of UIScrollView and that was the reason for unwanted horizontal scrolling. I solved it by setting the width of contentView equal to width of UIScrollView.
Hope it helps someone
You can select the view, then under Attributes Inspector uncheck User Interaction Enabled .
Introduced in iOS 11 is a new property on UIScrollView
var contentLayoutGuide: UILayoutGuide
The documentation states that you:
Use this layout guide when you want to create Auto Layout constraints related to the content area of a scroll view.
Along with any other Autolayout constraints that you might be adding you will want to constrain the widthAnchor of the UIScrollView's contentLayoutGuide to be the same size as the "frame". You can use the frameLayoutGuide (also introduced in iOS 11) or any external width (such as your superView's.)
example:
NSLayoutConstraint.activate([
scrollView.contentLayoutGuide.widthAnchor.constraint(equalTo: self.widthAnchor)
])
Documentation:
https://developer.apple.com/documentation/uikit/uiscrollview/2865870-contentlayoutguide
#Gulfam Khan's answer is the correct one, I am adding imagery to help the concept get more visibility.
When we set the contentView to have equal width's with the Scroll view, if the multiplier is even slightly greater than 1:1, then we will get horizontal scrolling.
Here is what it produces:
If you do not want horizontal scrolling, you most likely do not have horizontal content that exceeds the width of the superview.
Therefore if you ensure the contentView width does not exceed the width of the scroll view, that will automatically resolve the problem as UIKit recognizes there is no horizontal content to scroll to. Like so:
Now you should only see vertical:
I had the tableview contentInset set in viewDidLoad (as below) that what causing the horizontal scrolling
self.tableView.contentInset = UIEdgeInsetsMake(0, 30, 0, 0);
Check if there are any tableview contentInset set for different reasons and disable it
I struggled with this for some time trying unsuccessfully the various suggestions in this and other threads.
However, in another thread (not sure where) someone suggested that using a negative constraint on the UIScrollView worked for him.
So I tried various combinations of constraints with inconsistent results. What eventually worked for me was to add leading and trailing constraints of -32 to the scrollview and add an (invisible) textview with a width of 320 (and centered).
Try This:
CGSize scrollSize = CGSizeMake([UIScreen mainScreen].bounds.size.width, scrollHeight);
[scrollView setContentSize: scrollSize];
Disable horizontal scrolling by overriding contentOffset property in subclass.
override var contentOffset: CGPoint {
get {
return super.contentOffset
}
set {
super.contentOffset = CGPoint(x: 0, y: newValue.y)
}
}
Once I did it replacing the UIScrollView with a UITableView with only 1 cell, it worked fine.
Use this single line.
self.automaticallyAdjustsScrollViewInsets = NO;