SwiftUI界面赏鉴demo之《墨竹图》@ObservedObject @Published使用

SwiftUI 和 Flutter时代编程将成为一个有品位的工作，为此特开辟新板块，用于显示SwiftUI制作的界面demo，供大家赏鉴。

功能

• @ObservedObject
• @Published
• UserDefaults
• 自定义Cell

效果

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代码

import SwiftUI

struct ContentView: View {
    
    @ObservedObject var settingsVM = SettingsViewModel()
    
    var body: some View {
        VStack(alignment: .center) {
            Text("《墨竹谱》")
                .font(.largeTitle)
                .foregroundColor(.white)
                .bold()
            Text("元代画家吴镇赠予其子佛奴的画作")
                .font(.system(size:26))
                .foregroundColor(.white)
            
            self.$settingsVM.isOn.wrappedValue ? Text("轻荫护绿苔").foregroundColor(.white):Text("儗与可笔意").foregroundColor(.white)
            Toggle(isOn: self.$settingsVM.isOn) {
                Text("")
            }.fixedSize()
        }.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
        
            .background(self.$settingsVM.isOn.wrappedValue ? Image("muzhu01") : Image("muzhu02"))
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

import Foundation

class SettingsViewModel: ObservableObject {
    
    @Published var isOn: Bool = UserDefaults.standard.bool(forKey: "isOn") {
        didSet {
            UserDefaults.standard.set(self.isOn, forKey: "isOn")
        }
    }
    
}

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