I have an app which shows two images housed within a UIScrollview.
The scrollview is of size (320, 530), underneath it is an imageview size (320,38), this acts like a dock at the bottom of this screen, ( in fact it has to be there at the bottom of all screens in this app).
As it stand the scrollview works fine and the images switch from one to anothr when the user
moves the scrollview.
The problem is, I need the scrollview height to go all the way down ( from 530 to 568), and end up behind the dock imageview, when I change its height and the height of images within it, it just stops scrolling.
Is this impossible in scrollviews? does it have to have all of its screen real estate as top view?
Any solutions for this?
Thanks.
Update :
so I worked on the alpha and the image constraints, and the bottom imnage is located properly,
still the scrolling is not functioning.this is the latest code with changes.
http://ge.tt/4LYJGWl/v/0?c
thanks.
This is certainly possible. Add a full height scroll view to the controller's view, then add the small image view to the bottom. In the scene list at the left move that image view up so it's directly underneath the main view, which will make it a subview of that view rather than the scroll view (you'll then need to move the scroll view up above the image view so the image view will appear on top). You'll probably have to change some constraints to pin it to the bottom, and give it an alpha value less than 1 so the scroll view will show through.
After Edit
This is the screen shot of the scene from your updated code:
You only have one view that's directly under the main view, your scroll view. Compare that to my image.
Related
I have an Imageview covering half of the screen height and a tableview below it. Both are wrapped inside a UIScrollView. I want to scroll the whole view. Means inner scroll of tableview won't work and when I scroll, outer scroll will scroll image view up and then showing cells of tableview. At the end, Imageview will hide behind scroll and tableview content will take entire space. Can anybody tell me how to achieve this. ?
Thanks
I don't think you need the outer scroll view(UIScrollView). Why don't you add only the inner table view and image view to where your outer scrollview is added. The image view can be added either above or below the table view. Let say your image view is below the table view then your image view will be covered by table view. In order to make it fully visible, set the talbview's content inset top to imageview's height and its background to clear color. then you can see both image and table view contents without one covering the other. The last thing you need to do is you have to handle the image view's y position when you scroll the table view so it looks like they are in the same scroll view. Use the scroll view delegate that is already available to you and play with scroll view's content offset and image view's y position.
I answered some similar question here with some sample code. Hand off parent container's pan gesture to nested UICollectionView
It does with collection view but the main idea is same.
To elaborate on my question, I've three scrollviews one top of another, let say base, middle and top. Base scroll view's content size is more so it will scroll, middle scrollview's content size is equal to its frame so it will not scroll, top scrollview's content size is more than its frame so it will also scroll.
Now when I scroll the top scrollview, once it reaches its end, I"m expecting it would scroll the base scroll view as middle is not scrollable. But it seems middle scroll view consumes all my scroll events and not letting the scroll event to go to base scroll view.
I"ve tried by setting more content size to middle scrollview, then it working as expected, first top scroll view scrolls fully then it passes the scroll event to middle scroll view then to the base scroll view.
Now it is more evident that middle scrollview (which is non scrollable) is consuming all of my scrolling event from going to base scroll view. How do I prevent that.
Note : As I've to support zooming, I need scroll view in all three levels.
Any help would be really appreciated.
Thanks.
I have a UIScrollView designed with IB.
UIView
UIScrollView
UIView
UITextField
UIButton
...
If I tap on the text field the view scrolls away towards the upper left corner of the screen before the keyboard is appearing. The space above the keyboards remains empty. I can scroll back the view if I drag in this empty space.
I have googled around, but found only postings where users want to scroll UIScrollView. I want the view to stay where it is.
Thanks in advance for any suggestions.
Here's what happened.
You designed the whole thing in Interface Builder.
The scroll view was not scrolling, so you set its contentSize in code to the size of the scroll view's primary subview (what I like to call the content view).
The scroll view was still not scrolling, so you munged the content insets - and this caused the problem that brought you here.
Your mistake was (3). Instead, you should have thought more about (2), i.e., why isn't my scroll view scrolling even though I have given it a nice big content size?
The answer is that, in a storyboard or xib that has auto layout turned on, that's not what you do. What you do is use constraints from the content view to its superview (the scroll view), on all four sides. Set the constant for all four constraints to zero. This causes the content size to match the size of the content view, automatically.
I have a view that contains a scroll view and that scroll view has another 2 views in it: on top a standard view, and under that another view. This last view has a scroll view inside it. (a matroshka doll has nothing on this app) .
The problem is there is a button that causes the bottom view to resize and increase it's height, but the outer scroll view doesn't increase content size. So the bottom part of the bottom view (now resized to be bigger) is not visible.
Any suggestions on how to fix this mess ?
i have a scrollView that fits the whole screen. In that View i show some UIImages that scroll horizontally. Like in the PageControl Project from Apple.
Then, when the user taps the screen, i fade in a scrollView at the bottom with some other images. Also horizontally scrolling. Like in the ScrollView Project from Apple.
My problem is, that when i come to the end of the scrollView which was faded in, the upper scrollView also starts to drag. How can i stop that during activation of the second scrollView?
Redraw the frame limits on your first scrollView when the second enters the screen. That way, your touches won't respond to both views. This means you need a container-view to keep both views seperated from each other.
Then you just rescale it back whenever your second scrollView disappears.
Edit: or disable scroll in your first scrollview while the second is open.