I want to change the value with a slider control. slider(value: $value) ... ... ... value = 1 Can't change slider value when debugging. slider value want to change and I want to change it by user's operation. how to do?

at iOS. In Swift,I'm thinking of launching an app using a URL scheme UIApplicatio.shared.open(URL(string:"AppURLSchemeName")) I get a Error. Error: Domain = NSOSStatusErrorDomain Code = -50 "invalid input parameters" UserInfo=`{NSDebugDescription = invalid input parameters,_LSLine =249, _LSDLine = 249, __LSFunction = _LSDOpenClient openURL:filehandle:options: completionHandler } the environment is macOS Ventura 13.0 XCode vertion 14.0.1 iPhone 13 mini iOS 16.1 what's the issue

I need to use UnsafeMutablePointer <> to use a third party API. I'm using swift to create an iOS app. I use after declare, I was told that initialization was needed. after initialize, i Get a Error "Editor placeholder in source file". How should I initialize it? Below is a code. var value : UnsafeMutablePointer value.initalize(from; UnsafePointer , count: NumberOfArray)　　// I get an error hear.

I'm using SwiftUI I want to object is call by reference when the screen transitions from ContentView to RemoteController @ObservedObject became an error with "Cannot assign to property:'self' is immutable" I want to use the same object for both ContentView and RemoteController Is there any solution? Below is the code struct ContentView: View{ @State var Object : Controller? @ObservedObject var inputObject : SDController var body: some View{ NavigationView{ VStack{ Button(action: { Object = Controller.init(postEventsToMain: true) inputObject = Object! // error "Cannot assign to property:'self'is immutable" }) NavigationLink( destrination: RemoteController()){ RemoteController().environmentObject(inputObject) } } } } struct RemoteController:: View{ @EnvironmentObject private var inputObject : Controller var body: some View{ ........ } } class Controller: ObservableObject{ ........ init(postEventToMain : Bool = true){ ......... } }

I was studying swiftUI at SwiftUI Tutorials. On the way, the preview of swiftUI is in a state where the preview does not open with the error "cannot preview in this file --Failed to install". open the Diagnostics FailedToInstallAppError: Failed to install "appname.app" Could not install the preview host "appname.app" on iphone8 I get the error I created a new project and tried it, but I get the same error. Did the settings change? I would like advice on how to deal with it.