uicollectionviewcell

问题 I have a Protocol inside my CellClass which is detect the function 'editCommentInFeed'. I have create an 'editButton' inside my Cell and define the handler with 'editCommentField' which is calling per Delegate the function and over give the 2 Parameters. This 2 Parameters are important I need this Informations from the cell to detect in future actions which will be provided. For example I had tried to print something when the Button ist Pressed inside the Cell. But even this Statement is not

问题 I'm facing the following problem, well I have a custom collection view, where I upload an image from the URL I get from a service, everything works fine at the moment but sometimes when scrolling or when I leave the screen and return, my collection view customized it is altered, it does not load correctly, I have seen several posts where they present the same problem in different cases, but trying to conclude that my problem is at the moment of using the SDWebImage library. I have seen that

问题 In Android it's easy to create a grid list with the next margins: I found this solution for iOS but it doesn't add margins between cell and parent view, only between cells let itemSpacing: CGFloat = 3 let itemsInOneLine: CGFloat = 2 flow.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0) let width = UIScreen.main.bounds.size.width - itemSpacing * CGFloat(itemsInOneLine - 1) //collectionView.frame.width is the same as UIScreen.main.bounds.size.width here. flow.itemSize = CGSize

问题 I have a UICollectionViewCell with a UILabel showing the day difference between two dates. I want to update it every second. I have tried using NSTimer to reload the data of the UICollectionview , but it makes the UI very slow. How do I go about achieving this? Thanks. 回答1: You do not reload the whole CollectionView or even the individual cells just to update the label. You have 2 options: Write a NSTimer in the ViewController and just refresh the content of the visible cells. Schedule a

问题 I have a stock standard UICollectionView in a UIViewController that is its delegate. However the shouldShowMenuForItemAt func is not called for a long press. I have added a didSelectItemAt func which does get called on clicking a cell to make sure the delegate is indeed wired up correctly. I also implemented the canPerformAction to return true and performAction in the delegate along with the canPerformAction and canBecomeFirstResponder to return true in my UICollectionViewCell subclass. None

问题 How to access a collectionView that is embedded in a parent collectionViewCell in the main UIViewController? My main ViewController is a UICollectionView which houses a UICollectionViewCell called BannerCell. BannerCell has a collectionView which contains 3 cells: Headlines cell Image cell Posts Cell Within PostsCell, there is a collectionView of cells which contains posts. I want to access the collection view within the postCell, but I can't seem to get the reference of this collectionView

问题 I have a ViewController mycollectionview and create a UICollectionView collection view in it and set size to the frame size. I have a Custom UICollectionViewCell CollectionViewCell class. Images sizes are different and I want to just show a one cell and full fitted to screen at the same time (when not scrolling). Here is mycollectionview code : - (void)viewDidLoad { [super viewDidLoad]; imgnum = @[@"1.jpg",@"2.jpg",@"3.jpeg",@"4.jpg"]; UICollectionViewFlowLayout *layout =

问题 In my project, my collectionview cell comprises of the entire screen width and height, i've set it to horizontal scrolling and for making it dynamic for all screensizes, i am using this method func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let height: CGFloat = view.frame.size.height let width: CGFloat = view.frame.size.width return CGSize(width: collectionView.bounds.size.width,

问题 I am developing a music app whereby users can browse from a selection of tracks and save them into a playlist. I am having an issue where if a track is saved into a playlist twice, once after the other, the play controls do not act as desired i.e. 2x track1 is added at the beginning of the playlist - if selecting 1st track1 - plays and pauses just fine, then if I select 2nd track1 (if 1st track1 has already been selected, or vice versa) it carries on playing/pausing as if it were the the 1st

问题 I have a ViewController with 3 views : Header (UIView) TabBar (UIView) UIView3 (UIView) In my UIView3 I have a collectionViewController. A key element is that I put my collectionViewController.scrollEnable = False because otherwhise, when I'm scrolling, only the UIView3 is scrolling and I want my entier screen to scroll (so that if we scroll enough my Header and Tabbar are hidden. So this is what I have : And this is how my screen looks like : Which is perfect. But , when I'm scrolling down,