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HomeKit with SwiftUI: A Smarter Way to Control Your Home🦾

Are you tired of manually turning on your lights and adjusting your thermostat?

Do you want to control your home with just a few taps on your iPhone? Well, look no further! HomeKit with SwiftUI is the perfect solution to help you make your home smarter and more efficient.


What is HomeKit?


HomeKit is a built-in framework in iOS that allows you to control your smart home devices. You can use the framework to discover and configure devices, control their state, and create automation rules.


Using HomeKit with SwiftUI


To use HomeKit with SwiftUI, you need to add the HomeKit framework to your project and import it into your code. You can then use the HMHomeManager and HMAccessoryBrowser classes to discover and control your home devices.


Here’s an example of how to use HomeKit with SwiftUI:

import HomeKit
import SwiftUI

struct HomeView: View {
    
    @ObservedObject var homeManager = HomeManager()
    
    var body: some View {
        NavigationView {
            List {
                ForEach(homeManager.homes, id: \.self) { home in
                    NavigationLink(destination: RoomView(home: home)) {
                        Text(home.name)
                    }
                }
            }
            .navigationBarTitle(Text("Homes"))
        }
    }
}

struct RoomView: View {
    
    var home: HMHome
    
    var body: some View {
        List {
            ForEach(home.rooms, id: \.self) { room in
                NavigationLink(destination: DeviceView(room: room)) {
                    Text(room.name)
                }
            }
        }
        .navigationBarTitle(Text(home.name))
    }
}

struct DeviceView: View {
    
    var room: HMRoom
    
    var body: some View {
        List {
            ForEach(room.accessories, id: \.self) { accessory in
                HStack {
                    Text(accessory.name)
                    Spacer()
                    SwitchView(accessory: accessory)
                }
            }
        }
        .navigationBarTitle(Text(room.name))
    }
}

struct SwitchView: View {
    
    var accessory: HMAccessory
    
    var body: some View {
        Toggle(
            "",
            isOn: Binding(
                get: {
                    accessory.services.first(where: { $0.isPrimaryService })?.characteristics.first(where: { $0.characteristicType == HMCharacteristicTypePowerState })?.value as? Bool ?? false
                },
                set: { value in
                    accessory.services.first(where: { $0.isPrimaryService })?.characteristics.first(where: { $0.characteristicType == HMCharacteristicTypePowerState })?.writeValue(value, completionHandler: { error in
                        if let error = error {
                            print("Error writing value: \(error)")
                        }
                    })
                }
            )
        )
    }
}

class HomeManager: NSObject, ObservableObject {
    
    @Published var homes = [HMHome]()
    
    private let homeManager = HMHomeManager()
    
    override init() {
        super.init()
        homeManager.delegate = self
        loadHomes()
    }
    
    private func loadHomes() {
        homes = homeManager.homes
    }
}

extension HomeManager: HMHomeManagerDelegate {
    
    func homeManagerDidUpdateHomes(_ manager: HMHomeManager) {
        loadHomes()
    }
}

In this example, we’ve created a HomeView that displays a list of homes, a RoomView that displays a list of rooms in a selected home, a DeviceView that displays a list of accessories in a selected room, and a SwitchView that allows you to control a selected accessory with a toggle.


Customizing Your HomeKit Views


You can customize the appearance and behavior of your HomeKit views to fit your app’s style and functionality. For example, you can add icons to your accessories, group them by type, or even create your own custom controls.

Here’s an example of how to customize the appearance of a switch:

struct CustomSwitchView: View {
    
    var accessory: HMAccessory
    
    var body: some View {
        VStack {
            Image(systemName: accessory.category.iconName)
                .resizable()
                .frame(width: 50, height: 50)
            Toggle(
                "",
                isOn: Binding(
                    get: {
                        accessory.services.first(where: { $0.isPrimaryService })?.characteristics.first(where: { $0.characteristicType == HMCharacteristicTypePowerState })?.value as? Bool ?? false
                    },
                    set: { value in
                        accessory.services.first(where: { $0.isPrimaryService })?.characteristics.first(where: { $0.characteristicType == HMCharacteristicTypePowerState })?.writeValue(value, completionHandler: { error in
                            if let error = error {
                                print("Error writing value: \(error)")
                            }
                        })
                    }
                )
            )
        }
    }
}

In this example, we’ve added an icon to the switch by using the accessory.category.iconName property to retrieve the icon name for the accessory category.


Conclusion


HomeKit with SwiftUI is a powerful tool that allows you to easily control your smart home devices. With just a few lines of code, you can create a customized interface that fits your app’s style and functionality. So why not make your home smarter and more efficient today? Who knows, maybe your smart home will be so good that it will start making jokes of its own!

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