I have my own xib-file looking like this:
Now I programmatically add multiple instances of this XIB-View to my original View which is a UIStackView with full width inside of a UIScrollView which takes the whole screen size.
I want to achieve, that every instance of my xib-view has the whole displayWidth. This is what I tried:
myView.frame.size = CGSize(myView.frame.size.height, view.frame.size.width())
But I can't change the view's width with this code. How do I achieve to change the width?
Edit: This is how I add the views (it is in java because I am using multi-os-engine but It is almost exactly like in objective-c)
#Override
#Selector("viewDidLoad")
public void viewDidLoad() {
UIView checkBox = instantiateFromNib("CheckBoxView");
for (UIView v : checkBox.subviews()) {
if (v instanceof DLRadioButton) {
((DLRadioButton) v).setTitleForState(option.getName(), UIControlState.Normal);
}
}
configView.addArrangedSubview(checkBox);
}
private UIView instantiateFromNib(String name) {
return (UIView) UINib.nibWithNibNameBundle(name, null).instantiateWithOwnerOptions(null, null).firstObject();
}
I want to create a page which has a vertical but no horizontal scroll. It must adjust width of the content and vertical scroll automatically as per screen size.
Something similar to this:
I can not use UITableView since, my page may not have necessarily homogenous elements. It could have a combination of textfields , dropdown etc.
The previous answer was quite right, but not right at all. Indeed I tried to solve this problem using the method described before, but to make it work, I made some adjustments.
Your view's hierarchy has to be as follow :
UIScrollview :
View1
View2
View3
You don't need a container inside the UIScrollview, because apart the fact that it will be an extraview that you don't need, there is the problem that if you use this container-view you will get problem getting touch events in the views added.
So, let's make a step-by-step process:
Add scrollview to your viewController
The first step is to add the scrollview to your viewController, and we can simply do this programmatically in the following way:
UIScrollView scrollView = new UIScrollView();
scrollView.TranslatesAutoresizingMaskIntoConstraints = false;
View.AddSubview(scrollView);
View is the main-view of the viewController you are working in (aka Self.View).
Put attention to set TranslateAutoResizionMaskIntoConstrains property of the scrollview to false, otherwise autoresizing will mess your constraints.
Add constraint (autolayout) to your scrollView
You need to ensure that you layout will adjust for every different iPhone-screen, so simply use auotlayout to pin your scrollView to the viewController main-view (is the View used in the next code sample):
scrollView.TopAnchor.ConstraintEqualTo(View.TopAnchor, 0).Active = true;
scrollView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor, 0).Active = true;
scrollView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor, 0).Active = true;
scrollView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor, 0).Active = true;
In this way your scrollView is pinned to the bound of the main-view.
Create the view to be added
You need to create the view that you will add to the scrollView:
UIView viewToBeAdded = new UIView();
viewToBeAdded.TranslatesAutoresizingMaskIntoConstraints = false;
viewToBeAdded.Frame = new CGRect(0, 0, UIScreen.MainScreen.Bounds.Width, 200);
We have created a new UIView that setting its frame large as the screen (UIScreen.MainScreen.Bounds.Width) so it won't scroll horizontally, and with an arbitrary height (200 in the sample).
NOTE : even in this case you have to set TranslateAutoResizingMaskProperty to false, otherwise you will get a mess.
Add the view to the scrollView
Next step is to add our new view to the scrollView as follow:
scrollView.AddSubview(view);
Nothing more.
Set constraint for the view added in relation to the scrollView
Once you have added your view you have to said which will her behavior related to the scrollView. We assume that we will add several view to the scrollView, so we have to made a distinction, to the behavior of the FIRST view, the IN-BETWEEN views, and the LAST view.
So to be clear we assume that we are adding only 3 views, so we will have the three different cases.
FIRST VIEW
The important thing is that the first view has to be pinned to the top of the scrollView, we do this as follow :
firstView.TopAnchor.ConstraintEqualTo(scrollView.TopAnchor, 0).Active = true;
and then we set the others constraints:
firstView.WidthAnchor.ConstraintEqualTo(firstView.Bounds.Width).Active = true;
firstView.HeightAnchor.ConstraintEqualTo(firstView.Bounds.Height).Active = true;
IN-BETWEEN VIEW
The in between views (in our sample the secondView) need to be pinned to the previous view added (in our case the first view). So we do as follow:
secondView.TopAnchor.ConstraintEqualTo(firstView.BottomAnchor).Active = true;
So the top of the secondView is pinned to the bottom of the firstView.
And then we add the others constraints:
secondView.WidthAnchor.ConstraintEqualTo(secondView.Bounds.Width).Active = true;
secondView.HeightAnchor.ConstraintEqualTo(secondView.Bounds.Height).Active = true;
LAST VIEW
The last view (in our case the third view) instead needs to be pinned to the bottom of the previousView (in our case the secondView) and to the bottom of the scrollView.
thirdView.TopAnchor.ConstraintEqualTo(secondView.BottomAnchor).Active = true;
thirdView.BottomAnchor.ConstraintEqualTo(scrollView.BottomAnchor).Active = true;
And the usual other constraints for width and eight:
thirdView.WidthAnchor.ConstraintEqualTo(thirdView.Bounds.Width).Active = true;
thirdView.HeightAnchor.ConstraintEqualTo(thirdView.Bounds.Height).Active = true;
In this way the eight of the scrollView will adapt to the eight of the views added, due to the fact that the views inside are pinned to the top and the bottom of the scrollView.
CONCLUSIONS
If you follow these simple instruction you will get everything work. Remember to disable autoResizingMask, as this is on of the common mistake.
Hope it was helpful.
Cheers
In a custom renderer for Xamarin.Forms i've written my UITableViewController like this:
_controller = new InfoFieldItemsTableViewController();
_controller.TableView.SeparatorStyle = UITableViewCellSeparatorStyle.None;
_controller.TableView.SeparatorColor = UIColor.Clear;
_controller.TableView.AllowsSelection = false;
// http://useyourloaf.com/blog/self-sizing-table-view-cells/
_controller.TableView.RowHeight = UITableView.AutomaticDimension;
In my controller i am doing this to register all potential cell candidates:
private void RegisterCells()
{
foreach (var tuple in InfoFieldCellMapping.Map)
{
this.TableView.RegisterNibForCellReuse(tuple.Value.Item1, tuple.Value.Item2);
}
}
public override void ViewDidLoad()
{
RegisterCells();
base.ViewDidLoad();
}
I am doing this in my controller so cells resize themselves depending on how much height they need:
public override nfloat EstimatedHeight(UITableView tableView, NSIndexPath indexPath)
{
return 100;
}
Now all you need to do is create cell files from within your IDE which should be .xib files and design them in the editor using autolayout (so they can adapt to orientation changes automatically).
Within your TableViews datasource all that's left to do is mapping between your data item and it's corresponding cell similar to:
public override UICollectionViewCell GetCell(UICollectionView collectionView, NSIndexPath indexPath)
{
var dataItem = Items[indexPath.Row];
var key = ""; // use info from data item to figure out which key identifies your table cell to dequeue the correct kind of cell
var cell = collectionView.DequeueReusableCell(key, indexPath) as UICollectionViewCell;
}
That's all you need really. In my scenario i am mapping fields which may contain different controls for date entries, number entries, long texts, short texts etc etc.
I hope that helps
1.Add Leading,Trailing,Top,Bottom Constraints on scrollView to it'superview.
2.Add UIView as containerView of scrollview and add 6 Constraints from containerView to scrollview as below.
a)Leading b)trailing c)top d)bottom e)Center Horizontally.
3.Make sure top elements in container view must bind to top by adding top constraints and also bind bottom most element to bottom of container view by adding bottom constraints.And also all the items between topmost and bottommost in the container view must be vertically connected to each other so it will define the content size of container view.
it will define the actual content height for scrollview.
and finally define content size for scrollview in code.
As I mentioned here .
Refer to Step 1 and Step 2 ,set constraints on Scrollview and containerView.
I remove the margin between Scrollview and View , and I add some controls on the containerView , so it looks like as below:
Notice
Since we set the containerView's width equal to scrollview's width, the width is fixed, so we can scroll vertically not horizontally.
Height of controls and spaces between them should be set clearly, because the contentSize is auto calculated by adding them. (If contentSize is greater than the height of screen ,the scrollview can be scrolled)
I saw you set those constrains on controls , but you can't scroll down to see the controls out of screen, I think you are missing to set bottom margin on the last control(the downmost one).
Let us do a test.
1. We set the margin (between button and textfield ) to 1000 and don't set bottom margin between the textfield and containerView.
Result : can't scroll down to see the textfield out of screen.
2. Set the margin 1000 and add a bottom margin(10) between textfiled and containerView.
Result: can scroll
Demo Link
There're some good example of implement custom pager view using ScrollView like:
https://github.com/MarcBruins/BWWalkthrough-Xamarin-iOS
https://github.com/ariok/BWWalkthrough
Above sample work well, but if I have a UINavigationController as root contorller, and push above pager view as a child;
when scroll to switch page(drag and move both horizontally and vertically before drop), the whole pager view also moves vertically, this is not as expected.
does any has idea how to disable this vertically move(or bounce) ?
public override void ViewDidLoad(){
...
_pagedViewController.View.Frame = new CGRect(0, topMargin + pagerHeight, frame.Width, frame.Height);
...
//AddChildViewController(_pagedViewController);
View.AddSubview(_pagedViewController.View);
//_pagedViewController.DidMoveToParentViewController(this);
...
}
I've wrap page view inside container controler, and had code above, I've now fix issue by comment out two lines above.
I've found if I change pageview's height, also got vertical scroll problem, but this can be avoid by other fix.
I'm trying to create a signup form in a storyboard in the Xamarin Studio editor, but I can't get i to scroll.
I have set AutoLayout to false.
My Document outline can be seen at the picture:
And in my CreateUserViewController I have the following:
public override void ViewDidLoad ()
{
ScrollSignup.ContentSize = new CoreGraphics.CGSize (1000, 1000);
base.ViewDidLoad ();
}
The view is set to 700 in height
Solved it myself. Just needed to a a view in the scroll view and let that view contain the elements
It appears that like in native Xcode, in Xamarin studio for ioS if your first sub-view in a view hierarchy is a UITextView, then adding a top-layout constraint to this view will cause a large block of empty space to appear at the top of the scroll view.
This is similar to the Xcode version of the question here
iOS 7 UITextView vertical alignment
I solved this programmatically by adapting
Tanguy-G's answer for native Objective-C by setting AutomaticallyAdjustsScrollViewInsets to false in the constructor of my view controller.
public MyLovelyViewController (IntPtr handle) : base (handle)
{
this.AutomaticallyAdjustsScrollViewInsets = false;
}
EDIT: If you are setting any other aspects of the text view in question programmatically, make sure to call
this.AutomaticallyAdjustsScrollViewInsets = false;
after any other adjustments, otherwise the space will reappear, e.g:
confirmSummary.Editable = false;
confirmSummary.Selectable = false;
this.AutomaticallyAdjustsScrollViewInsets = false;
(I did this in the override of ViewDidLoad)