Category: swift

Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. and the open-source community. First released in 2014, Swift was developed as a replacement for Apple’s earlier programming language Objective-C, as Objective-C had been largely unchanged since the early 1980s and lacked modern language features.

  • NSTableView custom highlight color with NSTableRowView

    Getting the right color when you select NSTableView’s row was frustrating for me since I didn’t know how to do it properly. But it is really simple, all you need to do is having a class inherit from NSTableRowView and override its method drawSelection(in dirtyRect: NSRect).

    import Foundation
import Cocoa

class MenuTableRowView: NSTableRowView {

    override func drawSelection(in dirtyRect: NSRect) {
        if self.selectionHighlightStyle != .none {
            let selectionRect = NSInsetRect(self.bounds, 2.5, 2.5)
            
            if let color = NSColor.init(named: NSColor.Name("menu_table_selection_color")) {
                color.setFill()
            }
            
            let selectionPath = NSBezierPath.init(roundedRect: selectionRect, xRadius: 0, yRadius: 0)
            selectionPath.fill()
        }
    }
    
}

    Change menu_table_selection_color value in Assets.xcassets file.

    Custom NSTableRowView

    Now go to your NSTableViewDelegate’s method add your custom NSTableRowView.

     func tableView(_ tableView: NSTableView, rowViewForRow row: Int) -> NSTableRowView? {
        return MenuTableRowView()
}

    Here you can see how my Storyboard looks like. Table view highlight value must be regular.

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  • This app is not allowed to query for scheme fb in iOS

    This app is not allowed to query for scheme fb in iOS

    I wanted to open a Facebook Group page in the Facebook app on my iPhone but I was getting that error since I did not have any LSApplicationQueriesSchemes in my Info.plist file.

    This is the code

    let fbPage = "fb://profile/" + FB_GROUP_ID // Your Facebook group id e.g 8794808798015
let fbURL = URL(string:fbPage)
let canOpenURL = UIApplication.shared.canOpenURL(fbURL!)
if (canOpenURL) {
    UIApplication.shared.open(fbURL!, completionHandler: nil)
}

    After adding ‘fb’ in my scheme it solves the issue.

    My Info.plist file

    This app is not allowed to query for scheme
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  • Navigation in SwiftUI with multiple views

    Navigation in SwiftUI with multiple views

    Navigation in SwiftUI video

    Download Complete Login app with Laravel API

    I was trying to build a simple app in iOS + SwiftUI with multiple views that uses NavigationView and NavigationLink.

    This app is very simple and uses a model to navigate between destinations. Enum ViewType tracks all the destinations. If you want to have another view, View4, just add a new case in ViewType enum.

    struct Menu: Identifiable {
    var id = UUID()
    var name: String
    var image: String
    var destination: ViewType
}

enum ViewType {
    case home
    case view1
    case view2
}

    Our all views must have a property with menu type

    struct HomeView: View {
    var menu: Menu
    
    var body: some View {
        Text("Home View")
    }
}

    Our MasterView which is the main view in root ContentView. Also, we added HomeView as our default view here.

    var body: some View {
        NavigationView {
            MasterView()
                .navigationBarTitle(
                    Text("Navigation Demo")
                )
            HomeView(menu: Menu(name:"Home",      image:"image",  destination:    .home))
        }.navigationViewStyle(DefaultNavigationViewStyle())
  }

    In our MasterView we have an array of Menu with title and destination view case, which populated in a list view. 

    let  view1 =  Menu(name:"Home",      image:"image",  destination:    .home)
let  view2 =  Menu(name:"View 1",          image:"image",  destination:    .view1)
let  view3 =  Menu(name:"View 3",       image:"image",  destination:    .view2)

var body: some View {
        let menus: [Menu] = [view1, view2, view3]

        return List {
            ForEach(menus) { menu in
                self.destinationView(menu: menu)
            }
        }
}

    function destinationView return a NavigationLink based on what item you choose on the list and take the user to the expected view. 

    func destinationView(menu: Menu) -> some View {
        
        switch menu.destination {
            case .view1:
                return NavigationLink(
                    destination: AnyView(View1(menu: menu))
                )
                {
                    Text("\(menu.name)")
                }
            case .view2:
                   return NavigationLink(
                       destination: AnyView(View2(menu: menu))
                   )
                   {
                       Text("\(menu.name)")
                   }
            default:
               return NavigationLink(
                   destination: AnyView(HomeView(menu: menu))
               )
               {
                   Text("\(menu.name)")
               }
        }
        
    }

    Download the source code

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