I have a
UIScrollView
Labels
Labels
UICollectionView
I have disabled the UICollectionViews scrolling functionality, so I only want to scroll with the Scrollview. My problem is that I don't know how I can calculate the UICollectionViews height so I can update my UIScorllView. If it's many elements inside the UICollectionView, it's get clipped.
I have created this little HTML example to show what I'm looking for
http://jsfiddle.net/hDwPH/
Dummy code
So my suggestion would be to use a single UIScrollview. Create your own view (we'll call it A) with whatever you are trying to repeat in the Collection view and addSubview A to the UIScrollview over and over for however many times you want.
Another way that just came to mind would be to use entirely a collectionview create two collectionviewcells, one that has your labels and you only display it for the first cell and the other collectionviewcell for all the others
Related
I am trying to layout a vertical scrolling collection view cells to layout like this
When I tried to size the cells like that it made the bottom right one go onto the next line instead of group them together.
Take a look at the UICollectionViewLayout class. There you should find methods you need to achieve your desired look.
https://developer.apple.com/library/prerelease/tvos/documentation/UIKit/Reference/UICollectionViewLayout_class/index.html
I need to have iOS app with screen like this:
screen
The idea is when user start to scroll down the first UIView to move up until the second UIView reach the top where it will stick and only UICollectionView will continue to move up.
Currently I'm using this structure
UIScrollView (main scroll)
UIView (some banners)
UIView (UISegmentedControl)
UICollectionView (grid with items, scroll is disabled, main scroll is used)
I manage to do it, but I needed to set UICollectionView height constraint manually in the code (calculated based on all items in grid) in order to appear in UIScrollView (everything else is handled by AutoLayout in Storyboard). The problem with this is that UICollectionView think all cells are visible and load them, so the whole recycling & reusing thing does not work. It's even worst because I use willDisplayCell method on UICollectionView to load more data when last cell is displayed, but now it load all pages at once.
My question (actually they are 2)
How can I fix the issue above?
What is the right way to achieve this functionality? Maybe my whole approach is conceptually wrong?
Collection view is a scroll view itself. So maybe you could have same functionality only with Collection view with sections or even custom layout?
I want to add a subview to a UICollectionView in order to make a left panel that scrolls with the collectionview.
Using
[self.collectionView addSubview:myView]
all touches become disabled and I can no longer scroll the view. I've read that adding a subview to a collectionView like this is bad practice.. is this true? Why does it disable touches from reaching the collectionView event when
userInteractionEnabled = NO
I'm trying to do this: imgur link by grabbing the frame position of the first cell in each section, and adding a dot with to myView with the same y value.
Thanks for any help!
Adding subviews using the addSubview: method to a UICollectionView is very bad practice. It can cause a lot of different problems in the normal behaviour of the CollectionView. It can obstruct the views underneath it, capture the touch events, preventing them from reaching the actual scrollView inside the CollectionView, etc. The subviews added using this method will also not scroll as the other elements in the CollectionView do.
The correct way to do what you want is to implement a new type of UICollectionViewCell for the dots, and compute their locations in the prepareForLayout and layoutAttributesForElementsInRect: methods. Basically you'll have either one or two cells in each row. Which ones will have two rows will be determined by you in the methods I've mentioned.
In fact, Apple's docs have a perfect example that's even more complex than what you're trying you achieve. You should check it out from this link.
May I know the purpose of that scroll view ? Because, if you're looking for a subview that displays only a label or image etc., You can use custom collectionview cell instead if I am not wrong... Hope it helps :) :)
I currently have a UICollectionView that scrolls vertically and this is the perfect layout for my content, however now I need each element in that collection to be a flip through of pages just like the UIPageViewController. I can't seem to figure out how to combine these two types of views. The collectionview cell (if I understand correctly) cannot contain a viewcontroller. What would be an approach to achieve this?
I want to implement a UICollectionView with multiple sections which each section scrolls horizontally and independently like the attached image
I suggest you to use UITableView with customized UITableViewCells with UIScrollView as subview on its contentViews.
There are many samples, for example here
You can use multiple UICollectionViews in table cells. The tableView will scrolls vertically and The collection views can be configured to scroll horizontally by setting particular set of properties which will restrict them to scroll vertically, and they will only scroll horizontally. One constraint to consider is it is much more difficult to do animations that need to move from one table cell to another and you can't use a neat single change of collection view layout to animate all the items in your table view. But if these constraints aren't a problem then this is a relatively easy solution. I also tried it once. It worked for me. Hope that it works for you as well.