uicollectionview

问题 I have a view controller with a tableview inside it , in the table view i implemented a collection view with horizontal scrolling, the data appears correctly but i want to go to another view controller when i click on the collection view cell passing a string to that view , how can i handle this process . thanks in advance 回答1: You have two choice 1) Implement Collection view delegate & datasource inside view controller. You can do this in tableview's cellForRowAt method like cell

问题 I have a UIViewController and a UICollectionViewController . I add the UICollectionViewController to the UIViewController using the following: UICollectionViewFlowLayout* flowLayout = [[UICollectionViewFlowLayout alloc]init]; [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal]; self.toolsCollectionViewController = [[ToolsCollectionViewController alloc] initWithCollectionViewLayout:flowLayout]; self.toolsCollectionViewController.view.backgroundColor = [UIColor clearColor]

问题 I am trying to make a timeline where each section is a day and each day has many items (records). Here is my section (day) class: class YearMonthDay: Comparable, Hashable { let year: Int let month: Int let day: Int init(year: Int, month: Int, day: Int) { self.year = year self.month = month self.day = day } init(date: Date) { let comps = Calendar.current.dateComponents([.year, .month, .day], from: date) self.year = comps.year! self.month = comps.month! self.day = comps.day! } func hash(into

问题 I dynamically set width of each cell of UICollectionView according to text inside it. The problem is that most of the time the width size is correct but sometimes cell size is not correct. These are strings i displayed in cell let tabs = ["1st tab", "Second Tab Second", "Third Tab", "4th Tab", "A"] func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let text = tabs[indexPath.row] let font

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 In my project there is a grid of users. I made grid using collection view. When user taps on cell I need position or frame of selected cell. I have used touch event of view but it's not working in the case of collection view. override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { let touch = touches.first! let location = touch.location(in: self.view) print(location) } also this method works when you touch rest of UIView expect collectionView items. 回答1: You can use the

问题 I have a UICollectionView and only one section. Is there a way to set the background color of every row? (in my case it would be a gradient from black to white) 回答1: CollectionViews don't really have a concept of a rows because it's designed to have a flexible layout. Your best option is likely to have the background of the cells have your pattern and remove all the padding/margin between the cells. This will be a problem if the last row isn't full, so if the number needs to be flexible you

问题 Does anybody know how to subclass a UICollectionView in Xamarin.iOS? I tried this public class MyCustomUICollectionView : UICollectionView { [Export ("initWithFrame:")] public InfinitiveScrollingUICollectionView (CGRect frame) : base(frame) { // initialization } } but I get The best overloaded method match for UIKit.UICollectionView.UICollection(Foundation.NSCoder) has some invalid arguments Argument #1 cannot convert CoreGraphics.CGRect expression to type Foundation.NSCoder`. I also tried to

问题 Does anybody know how to subclass a UICollectionView in Xamarin.iOS? I tried this public class MyCustomUICollectionView : UICollectionView { [Export ("initWithFrame:")] public InfinitiveScrollingUICollectionView (CGRect frame) : base(frame) { // initialization } } but I get The best overloaded method match for UIKit.UICollectionView.UICollection(Foundation.NSCoder) has some invalid arguments Argument #1 cannot convert CoreGraphics.CGRect expression to type Foundation.NSCoder`. I also tried to

问题 I have to add a UICollectionView inside a UITableViewCell . The collectionView can have a different number of items. So the collectionView should adjust properly inside the tableView . I have implemented this inside my Project: https://github.com/vishalwaka/DynamicCollectionViewInsideTableViewCell In my case, the height of the cell is not being the adjusted after the height of the collectionView is set. How can I set the collectionView to not be scrollable and also show all content inside the