DevMemo

    List{                                  HStack(spacing:0){                         Text("xxx")                      Text("xxx")                 }.listRowInsets(.init(top: 0, leading: 0, bottom: 0, trailing: 0))           } Ref :  https://stackoverflow.com/questions/57202421/swiftui-remove-space-between-cells

  Rectangle ( ) . fill ( Color . red ) . frame ( width : 200 , height : 200 ) https://www.hackingwithswift.com/quick-start/swiftui/how-to-display-solid-shapes

https://qiita.com/owen/items/73473cd2206afda3c5d4

SwiftUI. How to change the placeholder color of the TextField?   https://stackoverflow.com/questions/57688242/swiftui-how-to-change-the-placeholder-color-of-the-textfield

Swift let a = [1, 2, 3, 4, 5] let b = a.map{$0 + 1} let c = a.filter{$0 > 2} let d = a.reduce(0, {x, y in x+ y} //let d = a.reduce(0, {$0 + $1})

 https://www.azul.com/downloads/?version=java-8-lts&os=macos&architecture=arm-64- bit&package=jdk

 https://qiita.com/KakeruFukuda/items/5c79a6d4c4b4e1458487

import UIKit import SwiftUI struct SecondView : View { var body: some View { VStack { Text ( "Second View" ).font(.system(size: 36 )) Text ( "Loaded by SecondView" ).font(.system(size: 14 )) } } } class ChildHostingController : UIHostingController < SecondView > { required init? ( coder : NSCoder ) { super . init (coder: coder,rootView: SecondView ()); } override func viewDidLoad () { super .viewDidLoad() } } Ref : https://stackoverflow.com/questions/56529488/is-there-any-way-to-use-storyboard-and-swiftui-in-same-ios-xcode-project Reif2 (Korean) https://mildwhale.tistory.com/37

  import SwiftUI import DateGrid struct ContentView : View {               @State var selectedMonthDate = Date ()     @State var mode = CalenderMode . month ( estimateHeight : 500 )          let dateInterval = DateInterval . init ( start : Date . getDate ( from : "2021 01 01" )!, end : Date . getDate ( from : "2021 12 11" )!)          let screen = UIScreen . main . bounds          init (){                  var dateComponents = DateComponents ()         dateComponents. year = 2021         dateComponents. month = 12         dateComponents. day = 11         let userCalendar = Calendar ( identifier : . gregorian ) // since the components above (like year 1980) are for Gregorian         let someDateTime = userCalendar. date ( from : dateComponents)                           //doen't work...         selectedMonthDate = someDateTime!                       }          var body : some View {                  ZStack {             VStack {           

 Project > Targets > Info > Custom iOS Target Properties add GADApplicationIdentifier Ref : https://software.small-desk.com/development/2021/09/08/xcode-no-infoplist-xcode13/

  struct HiddenNavigationBar : ViewModifier { func body ( content : Content ) -> some View { content .navigationBarTitle( "" , displayMode: .inline) .navigationBarHidden( true ) } } extension View { func hiddenNavigationBarStyle () -> some View { modifier( HiddenNavigationBar () ) } } ---------------------------------------------------------- .hiddenNavigationBarStyle() REF : https://www.hackingwithswift.com/forums/swiftui/removing-unwanted-and-unknown-whitespace-possibly-a-navigation-bar-above-a-view/7343

      NavigationView {             List{                 ...                }             }             .navigationBarTitle("")             .navigationBarHidden( true )             .navigationBarBackButtonHidden( true )         }   not NavigationView in NavigationView!  Ref :  https://www.hackingwithswift.com/forums/swiftui/removing-unwanted-and-unknown-whitespace-possibly-a-navigation-bar-above-a-view/7343