swift5

问题 In SwiftUI I'm noting to use a Timer that: Try 1 - This doesn't work as get "Use of unresolved identifier 'self'" var timer2: Timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { self.angle = self.angle + .degrees(1) } Try 2 - Works, but have to put in an "_ = self.timer" to start it later var timer: Timer { Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) {_ in self.angle = self.angle + .degrees(1) } } // then after need to use " .onAppear(perform: {_ = self.timer}) "

问题 So I want I my base tableView, upon which I've derived others, to centralize drag-n-drop operations. Each of these tableViews have a distinct array controller as its dataSource, with each item class conforming to pasteboard reading and writing protocols. But I'm stuck on its setup override func mouseDragged(with event: NSEvent) { let arrayController = self.dataSource as! NSArrayController let itemClass = arrayController.objectClass let objects = arrayController.arrangedObjects as! [itemClass]

问题 I have four item in tab bar. 1> Watch. (Black Colour) 2> On Demand. (Black Colour) 3> Search. (Black Colour) 4> Settings. (My Colour) How can i change the colour of item text in tab bar to match with its icon colour. (Right now Performance is selected in the tab bar) enter image description here How can I change the color of "1,2,3" text in tabbar to match with its icon color. (Right now Performance is selected in the tab bar) I tried to set TitleTextAttributes. UITabBarItem.appearance()

问题 This question already has answers here : swift: how to get the indexpath.row when a button in a cell is tapped? (14 answers) Closed 3 months ago . In tableview, on the cells there are buttons in it, need to get the index of tableview means, which index cell's button is clicked. So, not able to implement it in swift 5. So far tried is but this give me wrong value. let position: CGPoint = sender.convert(CGPoint.zero, to: organizationsTableView) if let indexPath = organizationsTableView

问题 I have an image looking like this But it should look like this : I added the line : cameraUIButton.imageView?.contentMode = .scaleAspectFit It doesn't works BUT if i click on the button it fit !! What append in swift when you click on the button that recalculate the fit of the image ? I already tried cameraUIButton.setNeedsDisplay() cameraUIButton.imageView?.setNeedsDisplay() cameraUIButton.imageView?.layoutIfNeeded() cameraUIButton.layoutIfNeeded() self.view.layoutIfNeeded() and all in

问题 I saw in some article that @state has many limitations that we shouldn't use it with complex models and its preferable to use it with the simple property like string, bool, ... etc. and we should use it inside the view itself. I tried to make a struct model and mark it with @state in the contentview (ParentView) and pass this model to its child views by wrapping it with @binding it worked just fine, so i don't understand why we still need @objectbinding as we can pass the same value to these

问题 I need to change the UITabBar height to 95. I can do that in the older version of iOS Swift. This is my code that work in the older version. override func viewWillLayoutSubviews() { super.viewWillLayoutSubviews() tabBar.frame.size.height = 95 tabBar.frame.origin.y = view.frame.height - 95 menuButton.frame.origin.y = self.view.bounds.height - tabBar.frame.size.height - 10 shadowBtn.frame.origin.y = self.view.bounds.height - tabBar.frame.size.height - 15 } 回答1: Try it in viewDidLayoutSubviews

问题 I encountered a weird behavior. The best way I can put it is … Not overridden protocol methods in a class extension are not called while the superclass already conforms to the protocol (via extension) . However this happens only while it's build with the release build configuration. class A: UIViewController {} extension A: UIScrollViewDelegate { func scrollViewDidScroll(_ scrollView: UIScrollView) { print("scrollViewDidScroll in superclass") } } class B: A { // A tableView (and its data

问题 In info.plist file I configured URL Identifier and URL Scheme successfully. Also I am able to open app using custom URL. The problem is when app launches first time the method func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) does not call. I have some dependent functionality based on above method. So when app launches first time I am not able to see anything in my app. Also I added code in method func scene(_ scene: UIScene, willConnectTo session:

问题 I'm experimenting with SwiftUI and would like to fetch an update from my REST API with a search string. However, I'm not sure how to bring the two components together now. I hope you have an idea. Here my Code: struct ContentView: View { @State private var searchTerm: String = "" @ObservedObject var gameData: GameListViewModel = GameListViewModel(searchString: ### SEARCH STRING ???? ###) var body: some View { NavigationView{ Group{ // Games werden geladen... if(self.gameData.isLoading) {