I am trying to do some horizontal collection view with dynamic height of each cell. Like citymapper does when you have aready choosen a trip. ¿Has anyone got any idea of how to do this? Even though if it's not with a collection view.
Video of the behaviour
One way of doing this is implementing the UICollectionViewDelegateFlowLayout of the collectionView.
One of the methods of this delegate is final public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize. Here you can return the size of the collectionCell depending on the content or whatever you use to determinate the height.
Hope it helps.
Related
I have implemented UICollectionView with the vertical scrolling and paging, first image showing properly but after scrolling layout get changed.
Code -
// MARK: - UICollectionViewDelegateFlowLayout
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: self.collectionView.frame.width, height: self.collectionView.frame.height)
}
I enable the paging from UICollectionView
Also attached images below.
Thanks in advance.
pls check below screen sort setting of collectionview into storyboard.
Estimate size none
others min spacing for cells & for lines are zero or not
I am currently trying to resize my cell within my CollectionView. I have already implemented the dataSource, CollectionViewDelegate and CollectionViewDelegateFlowLayout.
This is the code I have for the latter:
extension ViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout
collectionViewLayout: UICollectionViewLayout, sizeForItemAt
indexPath: IndexPath) -> CGSize
{
return CGSize(width: 100.0, height: 100.0)
}
}
The problem is that when I head over to my storyboard and select my CollectionView and then go to the Attributes Inspector to switch "Estimate Size" from "Automatic" to "None," I would get three columns after running my app [Image #1].
The result I am looking for is to be able to have one middle column with a bigger cell as I show on Image #2.
Has anybody dealt with this problem before?
In order to show a collection view cells as a list, you can change your cell width equals to the width of the collection view. Giving constant width will not work for different device size.
func collectionView(_ collectionView: UICollectionView, layout
collectionViewLayout: UICollectionViewLayout, sizeForItemAt
indexPath: IndexPath) -> CGSize
{
let width = collectionView.frame.width
return CGSize(width: width, height: 100.0)
}
}
And give your desired constraint values for the inner rectangular view to achieve the desired look. Make collectionView cell background to clear.
The horizontal scrolling in UICollectionView only returns one row and I need to make a horizontal scrolling collection view with 2 rows just like the image below
[1]: https://i.stack.imgur.com/Vs1kt.png :[1]
You need to set fix height of the CollectionView and then use sizeForItemAt() under UICollectionViewDelegateFlowLayout which returns CGSize. You have to manage the cell height something like this.
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: 50.0, height: collectionViewHeight / 2) //<-- Manage height and width accordingly.
}
Is there a way to make all items in a collection view fit in one row and not automatically place items in an another row? I'm trying to copy something like Instagram's story display like the link below:
However, In my collection view, I'm getting a count from a server, and displaying the information in a collection view but it always goes to the next line after 3 items are displayed.
// number of sections function
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return pictures.count
} // end of function
I think you don't want Vertical scrolling in Collection view.
For horizontal scrolling in collection view, select collection view in storyboard and change scroll direction to horizontal.
Refer this below pic:
you can add collectionViewLayout delegate method like this. CGFloat(3.0) is how many item you want, you have to divide it from collectionView's width
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let itemWidth: CGFloat = ((collectionView.bounds.size.width) / CGFloat(3.0))
return CGSize(width: itemWidth, height: collectionView.bounds.size.height)
}
I want to create a custom layout which should look like the picture here: Custom Layout
I found a tutorial by Ray Wenderlich (https://www.raywenderlich.com/107439/uicollectionview-custom-layout-tutorial-pinterest) which does more or less the same but it was to complicated for me so I wasn't able to shift this to my needs.
I just need the easy layout, and I also know the size for my cells, I don't have to calculate them.
Could anyone please help me.
In
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
of UICollectionViewDataSource create a switch for the variable indexPath.row and set the size of the cell:
cell.frame = CGMake(height: myHeight; width: myWidth)