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.
Related
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 want a screen with scroll, and I want to scroll until a part of the view. When I reach this, this part will be fixed on the top and you can go on scrolling. In the image:
You begin scrolling until the buttons part, then, the buttons stay fixed in the top and you can scroll more. It's like the spotify app effect in the lists, more or less, if you know it.
Thank you in advance
You could probably achieve this by implementing the -scrollViewDidScroll: method in your scroll view's delegate. When the view scrolls, check the offset to see if the button is visible. If it is, and if it's close to the correct position, you could remove it from the scroll view and position it above the scroll view in the position you want.
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.
Setup:
I have a full-screen, parent UIScrollView that has paging enabled. Then I have a small, second UIScrollView inside of the first one, with also paging enabled.
Problem:
If I swipe the second UIScrollView, it scrolls fine untill it runs out of pages, then the parent UIScrollView takes over scrolls. For example, if I am on the last page on the second UIScrollView, swipe to left, the parent UIScrollView begins to scroll to right. I tried enabling exclusiveTouch, but no change.
Question:
Is there a way if I scroll the second UIScrollView, only that will scrolls and stops, the parent UIScrollView will never move from that original swipe?
You can set scrollView.scrollEnabled = NO; when other scroll is moving. You can detect when scroll begin dragging and didScroll.
You can get everything with basic scrolling with full screen view from this one
https://github.com/zvonicek/ImageSlideshow
Trust me it really work and also work at rotating device.
UIScroll view lets me declared a scrollable area when I have too much content for one page. Strangely, the scroll view in question behaves as desired in the X-axis, with no scrolling whatsoever allowed. Unfortunately, the Y axis -- where scrolling is necessary -- doesn't 'clip' the allowed scroll area to the content size. The user can scroll outside of the content size, and only after they let go does scroll view 'bounce' back to the allowed zone.
I want to prevent the user from scrolling further up than there is content to view (down doesn't bother me) because it looks 'wrong' to have the header at the top of the scroll view pull down, leaving the regular background behind it.
If you are making your UIScrollView in interface this is as simple as deselecting the
"Bounces, Bounces Horizontally, and Bounces Vertically"
check boxes in your scrollView's attributes. If you are designing the UIScrollView in code you can add this.
self.textView.alwaysBounceHorizontal = NO;
self.textView.alwaysBounceVertical = NO;
self.textView.bounces = NO;