SwiftUI NavigationView设置导航条颜色

SwiftUI NavigationView设置导航条颜色

    var body: some View {

        NavigationView {
                List {
                    }
              .navigationBarUIColor(ColorManager.mainColorBlue)

    }
extension View {
    
    func navigationBarUIColor(_ backgroundColor: Color?) -> some View {
        self.modifier(NavigationBarModifier(backgroundColor: UIColor(backgroundColor!)))
    }

}

新建一个文件

//
//  NavigationBarModifier.swift
//  SwiftUI2
//
//  Created by TongBin Mac on 2020/9/28.
//

import SwiftUI

struct NavigationBarModifier: ViewModifier {
        
    var backgroundColor: UIColor?
    var backColor: Color?
    
    init( backgroundColor: UIColor?) {
        self.backgroundColor = backgroundColor
        let coloredAppearance = UINavigationBarAppearance()
        coloredAppearance.configureWithTransparentBackground()
        coloredAppearance.backgroundColor = .clear
        coloredAppearance.titleTextAttributes = [.foregroundColor: UIColor.white]
        coloredAppearance.largeTitleTextAttributes = [.foregroundColor: UIColor.white]
        
        UINavigationBar.appearance().standardAppearance = coloredAppearance
        UINavigationBar.appearance().compactAppearance = coloredAppearance
        UINavigationBar.appearance().scrollEdgeAppearance = coloredAppearance
        UINavigationBar.appearance().tintColor = .white

    }
    
    func body(content: Content) -> some View {
        ZStack{
            content
            VStack {
                GeometryReader { geometry in
                    Color(self.backgroundColor ?? .clear)
                        .frame(height: geometry.safeAreaInsets.top)
                        .edgesIgnoringSafeArea(.top)
                    Spacer()
                }
            }
        }
    }
}

optinon + commond + P 看一下效果

ps 对于网上这个功能也收费，表示不明白为什么