uicollectionviewflowlayout

问题 In this code I am trying to change the size of the first cell of the UICollectionView and the others with the same size but in the first row only one cell is coming out when I want two to come out: func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: if indexPath.row == 0 { return CGSize(width: collectionView.frame.width/1.5-2, height: collectionView.frame.width/1.5-2) } else { return CGSize(width: collectionView.frame.width/3.0-3, height: collectionView.frame

问题 iOS UICollectionView how to Create Horizontal Scrolling rectangular layout with different size of items inside. I want to create a Rectangular layout using UICollectionView like below. how can i achieve? When i scroll horizontally using CollectionView 1,2,3,4,5,6 grid will scroll together to bring 7. The Below are the dimensions of 320*480 iPhone Resolution. Updated Screen below. First 6 items have below dimensions for iPhone 5s. Item 1 Size is - (213*148) Item 2 Size is - (106*75) Item 3

问题 I am using func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { return CGSize(width: 400, height: 600) } to specify my CollectionView 's cell sizes. It works fine but as soon as I add a width constraint (UILabel.width == ContentView.width) to my UILabel inside the ContentView of the cell, the cell's width shrinks to the intrinsic width of the UILabel . I am using

问题 I'm using UICollectionReusableView as a header of UICollectionView section. I enabled "sticky headers" with: let layout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout layout?.sectionHeadersPinToVisibleBounds = true I'm inserting new sections to collection with: collectionView.performBatchUpdates({ self.collectionView.insertSections(IndexSet(integersIn: collectionView.numberOfSections...viewModel.numberOfSections - 1)) }, completion: nil) If the insertion happens when

问题 func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { if collectionView == self.collectionViewVideo { var collectionViewSize = collectionViewVideo.frame.size collectionViewSize.width = collectionViewSize.width/3.0 //Display Three elements in a row. return collectionViewSize } else { return CGSize(width: 60, height: 60) } } 回答1: You also need to take space in account. Space is your collection

问题 Hello i want to show the collectionView exactly as the above image. I know that it responsible for UICollectionViewFlowLayout, but unable to do it. Help is much appreciated. Here is my code func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let yourWidth = (collectionView.bounds.width - 4) / 3.0 let yourHeight = yourWidth return CGSize(width: yourWidth, height: yourHeight) } 回答1: Your

问题 For UICollectionView's dynamic height cells we use, if let layout = self.collectionViewLayout as? UICollectionViewFlowLayout { layout.estimatedItemSize = UICollectionViewFlowLayoutAutomaticSize } with the proper constraint of height and width, it works fine with iOS 11.* versions but it breaks and does not make the cells dynamic for iOS 12.0 回答1: In my case, I solved this by explicitly adding the following constraints to the cell's contentView. class Cell: UICollectionViewCell { // ...

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 Collection View with cells of dynamic height (based on a possibly multiline label and a textview inside), which adapts in height perfectly when I span it over multiple lines. However, when the text is just one word or it doesn't cover the entire screen width, the cell is just as wide as needed to be, resulting in cells next to each other instead of underneath each other. Take a look at the result with different lengths of text inside the textview. However, I want the cells to be

问题 I am using this code to get correct type but not getting the view what i want can any one tell me where am i wrong override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) screenSize = UIScreen.main.bounds screenWidth = screenSize.width screenHeight = screenSize.height videosCollectionView.delegate = self videosCollectionView.dataSource = self } func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return 4 } func