I am using UIScrollview and top of a UIView but scrolling is not working.
for scrollview i added constraints all the side (0,0,0,0) then i have take container view and adedd constraints for (0,0,0,0) for all side . and one more constraints i added for this container view to View with equal width.
my scrollview hight is 504 and containner hight is 840. i am not getting any warning and suggestion constraints but not able to scroll . what is missing here .Please suggest me .
if you have added constraints properly . then add this
make property or your scrolview and container view as
#property (weak, nonatomic) IBOutlet UIScrollView *scrollview;
#property (weak, nonatomic) IBOutlet UIView *containerview;
then in .m file
#synthesize scrollview,containerview,
then add this
-(void)viewDidAppear:(BOOL)animated
{
[scrollview setContentSize:CGSizeMake(scrollview.frame.size.width, containerview.frame.size.height)];
}
I hope the will solve your issue.
There is no problem with autolayout in x-code 6.4 just try to check that you have properly bind the outlets of scrollview as well as give contentsize to scrollview that how much you would like to scroll your scrollview.
scrollview.ContentSize = CGContentSize(0, height);
--> Give height as float or integer as how much you want to scroll your scrollview.
For the ScrollView to work, reference it to your .h file by CTRL + Dragging the scroll view, and on your .m file add a
scrollView.contentSize(0,doubleTheSizeOfTheViewHeight);
if you want the scroll to be scrollable horizontally do the same with the width.
Hope this helps
Update
Or you can always use this for the storyboard way of doing it:
Storyboard UIScrollView contentSize?
To make UIScrollview scrolling, you have to uncheck checkbox with "Use Auto Layout" from XIB.
Related
I am designed my screen in xib using autolayout(xcode 6). I have to redesign the screen programmatically using autolayout.
I have 4 views in my screen horizontally. I have to hide the third view and move the fourth view to third view's position using autolayout.
How do I update the constraint programmatically.
You may use NSLayoutConstraint and assign proper IBOutlet to any of your constraints and then where you wants to change the view size use constant property of NSLayoutConstraint to change the value.
e.g
in your viewController.h
#property (strong, nonatomic) IBOutlet NSLayoutConstraint *tempConstraint;
some where in your viewController.m
tempConstraint.constant = 50; // or what ever you want
I am using autolayout. In xib i have a scrollview as a parent view. Added one view as a subview. For that subview i have added four child elements. Three are views(say view1,view2,view3) and one is label which is having multiline text.
I am using the below code to change the height of the view
#property (strong, nonatomic) IBOutlet NSLayoutConstraint *view1Height;
self.view1Height.constant = 200;
In this case there is no issues with content size the view2 and view3 frames are adjusted automatically.
But while coming to multiline label I am using the below code for setting label text
#property (strong, nonatomic) IBOutlet NSLayoutConstraint *textLabelHeight;
self.textLabelHeight.constant = expectedLabelSize.height;
But here I am facing issue with scroll content size. Unable to view the entire text. Similarly I want to place one more view below the label how to set constraints for it.
I'm using autolayout in my project and I have a scrollview that has a button centered in it. I have gotten the scrollview to scroll, but not to take up the entire screen.
I've tried to follow the tutorial here: https://developer.apple.com/library/ios/technotes/tn2154/_index.html, as well as I have checked out a few similar questions on here. The issue is that I want the contents of the scrollview to center, rather than be pinned to the top/bottom/left/right.
Here is my view hierarchy:
Could you please help me out?
You have added constrains between your scroller view and its super view. These constrains determines the frame of the scroll view. You can think of the scroll view as a window, through which you can see the the contents behind. The frame is the just the size of the window. Of course, you can slide the window, which gives you the sights of parts of the contents.
Now you have the size of the window, but you also need to tell Xcode the size of the contents. If you just say put everything in the middle without telling the width, how can Xcode know where is the middle?
So, you have to tell the width (as well as height). Let's think about a simple example, how to center a single label in a scrollview.
You should first pin the edges of the scroll view to its super view just as what you did. After that you should add constraints between the edges of the label and the edges of the scroll view, besides, you should also add the with and the height constraints of the label.
The leading space, the trailing space and the width together give the with of the contents, while the top space, bottom space and the height together give the height of the contents.
|---leading space---|label width|---trailing space---|
|---------- content with of the scroll view -------------|
But you may want to set the with of the content view equal to the with of your screen, then you need to do some programming. Set there outlet properties in you code
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *trailingSpace;
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *leadingSpace;
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *width;
In your viewWillLayoutSubviews do this
CGFloat contentWidth = self.view.frame.size.width;
CGFloat horiPadding = (contentWidth - self.width.constant) / 2;
_trailingSpace.constant = horiPadding;
_leadingSpace.constant = horiPadding;
Now you the label is at the horizontal center of you scroll view! Your scroll view has already knew the with of its contents, so you don't need to do this for any other view you added in your scroll view: you can just add the center constraint.
You can also do the same thing for the height.
I have a UIViewController with a UITableView set in interface builder.
In my h-file, I have connected the UITableView *myTableView.
(#property (strong, nonatomic) IBOutlet UITableView *tableView;)
In the bottom of my view, I have a toolbar. This toolbar covers the last cell of myTableView.
After reading around a lot, I find that I can set the height this way:
CGRect fr= CGRectMake(0, 0, myWidht, myHeight);
[self.myTableView setFrame:fr];
NSLog(#"test %f",self.myTableView.frame.size.height);
This logs : test "myHeight", but myTableView is still covered by the toolbar!!!
I have also tried to set the constraints in interface builder, but I still fail.
Is there a way to fix this issue, so the last cell in the tableview is not covered by the toolbar in the bottom of the view?
Resetting the simulator, and adjusting constraints in interfacebulder solved it :-)
I originally had a normal view with a bunch of stuff in it, and I want that view to be an UIScrollView, so I created a new ScrollView and dragged everything over. The view is not scrolling.
After looking around - I unchecked use autolayout, but that didn't work. I also realize that this could be solved by setting contentSize, but I have access to this view through a variable that is of type UIView, and not UIScrollView. In other words I would be doing -
self.someController.view.contentSize = //something
where self.someController.view is only an UIView and contentSize is not a property of UIView(or at least that's what I'm seeing- I get compiler warnings).
Why is this scroll view not scrolling?
EDIT -
So I stupidly forgot I can cast - I did that, but it's still not working -
UIScrollView* basicCardView = ((UIScrollView *)self.detailController.view);
basicCardView.contentSize = CGSizeMake(basicCardView.frame.size.width * 12,
basicCardView.frame.size.height);
You need to connect your scrollview to Iboutlet var in .m .
Create var in your interface:
IBOutlet UIScrollView *scrollview;
And connect to your scrollview in storyboard, then you can set contentsize.
[scrollview setContentSize:CGSizeMake(2000,200)];
Elto has it correct. To elaborate: In your view controller .m say it's called MyViewController:
#interface MyViewController ()
#property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
#end
Go back to storyboard, select your view controller and select the connections tab (last one on the upper right). You should now see an outlet called scrollView. Drag a connection from that outlet to the scroll view that you added to the scene.
Now the content size code can be written. Just to get it working, use large constants in content size, like:
self.scrollView.contentSize = CGSizeMake(1000, 1000);
The size you're setting in the post (on the wrong view) looks like it's just the size of one of the subviews. You want the content size of the scroll view to be more like a multiple of the scrollView's size. You want the rectangle it can scroll within to at least encompass the frame (not the bounds) of every subview it contains.