I have an image in which i want to change it's size when scrolling down and return it's original size when scrolling up ... something similar to this:
so i have imageview and then scroll view .. when scrolling down the imageview height shrink and it's image change and when scrolling back to top the imageview height returns and the big image returns as well ..
how can i achieve this? is there any library or something that helps me with this?
Related
I have a scrollview.Horizontal and vertical scrollbars are removed because it is ugly and I have space constraint.
When I populate items into content of the scrollview as shown in the image
I can't scroll. The view is moving but doesn't scroll.
When I scroll, just scroll to some extent and scroll back to the original position.
What could be wrong?
Check if you have Vertical checkbox enabled on Scroll Rect component.
On your content object after adding ContentSizeFitter, you need to select either Min Size or Preferred Size to make the scroll view content automatically resize. The unconstrained option doesn't drive the height so your scroll view won't scroll.
Make sure that the Height parameter in the Content object is not equal to zero:
What happens when you press play:
Now let's set Height to something much bigger than zero:
Here is what we get when we press play this time:
(The scroll bar appeared!)
Credit: Unity scrollview can't scroll to the end
I have put 14 items in scroll view but it gets stuck after 6 items. I have not put any code, just did all from interface builder (items are arranged vertically). I can see the items below but it jumps to 6 items when I release the touch. It is not that the scroll view is not working, it is just not showing as much I want it to show.
Has any-body got any idea what is happening? any help is appreciated.
You should set the content size of your scrollview.
e.g.
[scrollview setContentSize:CGSizeMake(scrollview.contentSize.width, heigth)];
Where set height that contains all your sub controls in scrollview.
Scrollview content size is not set properly. Use setContentSize: to set the content size of the scrollview
You added the content into scrollview so now you have to make scroll know to what size it shoul scroll and show the content
Do
Set an outlet and then add this code in viewDidLoad
[scrollview setContentSize:CGSizeMake(width, height)];
From Docs
contentSize
The size of the content view.
#property(nonatomic) CGSize contentSize
Discussion
The unit of size is points. The default size is CGSizeZero.
Here is a nice tutorial since you are a beginner .
may be its too late, but here is how i solved it:
put the items in a UIView and stretch that view as much as it need to be stretched.
put that UIView in the scrollview.
put a scroll view in the main uiview, the height and width will be similar to uiview.
I have an array of images and must be scrolled horizontally which i could manage, But in each image the description of the image but be scrolled upwards above the image something like i shown in the image. How it is possible?
Thanx
Jacu
Use a (horizontal) UIScrollView that contains UIView's. Each of the UIView's then contains an UIImageView, and another (vertical) UIScrollView that contains the UITextView's.
Make sure that:
the contentSize.height of the horizontal UIScrollView is smaller than or equal to its height
the contentSize.width of the vertical UIScrollView is smaller than or equal to its width
the UIImageView is added before the UIScrollView to the containing UIView
the background of the UITextView is (semi-)transparent
By the way, if the text is not editable, then you'll be better off using UILabel instead of UITextView
I am trying to create something like this (look at the time), you can basically slide it horizontally.
Can anyone give me any suggestions on how to do this in iOS?
You'd use UIScrollView which you can constrain to just horizontal movement. The Scrolling demo may help to get you started.
It is pretty easy:
create a scrollview with frame of (xOrigin,yOrigin,SCREEN WIDTH,Height).
set the content size to (CONTENT WIDTH, Height).
setShowsHorizontolScrollIndicator to no to hide the scroll indicator.
Note: Width of the contentSize property should be greater than the frame width to make it horizontally scrollable.
Setup: I have a UIView with a scroll view nested within it. Within the scroll view I have a label, uiimage, and a tableview (grouped). The label, uiimage, and tableveiw are populated by a webservice. The last section in the grouped table view contains text that will never be the same and could be as long as 5 characters to 250+. Also, this view is pushed from a basic tableview (so it has a navigation bar. If that matters at all).
Expected: The uiview should extend in height depending on the height tableview extends to. Then I will be able to set the scrollview to accommodate the height I need to be able to scroll.
Problem: I'm not quite sure how to approach the issue. I really only know how to change the height to fixed values, which will not work properly in almost any scenario.
Am I using UIScrollView incorrectly? Do I need to resize the UIView at all?
You don't have to modify your UIView frame size, which has to be the size of your screen. The UIScrollView frame size must also be the same, it represents the part of its view actually displayed.
What must change is the UIScrollView contentSize, which defines height and width for data inside it ;)
You can calculate it using each inside element's height and by adding the correct margin.
Thus, you could have a UIScrollView content size of 320 * 600, which will let you automatically scroll down.
In fact, you have to display your content independently of the final frame size. If you have a content of 500*500, just display it inside your UIScrollView. Then tell it the size of it's content, and it will automatically set scrolling possibilities if needed.
Turns out I had to create a UIView programmatically and set it as the header of the UITableView. It works perfectly now. :)