swift - Xcode12 静态导航栏

Question

我正在尝试设计带有呼叫按钮的导航栏。但是，标准导航栏在滚动时从大到内联，这使得呼叫按钮不再适合导航栏？滚动时有没有办法阻止导航栏切换？还是有一种特定的方法可以在滚动时将按钮保留在导航栏上？任何帮助将不胜感激！谢谢！

这就是我目前正在使用的东西！

.navigationBarTitle("Elevate", displayMode: .large)
        
        .navigationBarItems(trailing:
            HStack
            {
                Button(action: {
                    if let url = NSURL(string: "tel://\(1234567890)"), UIApplication.shared.canOpenURL(url as URL) {
                        UIApplication.shared.openURL(url as URL)
                    }
                    print("Edit button was tapped")})
                {
                    Image(systemName: "phone.fill")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: 30)
                        .padding(.top)
                        .accentColor(.black)
                }
                
                Button(action: {
                        print("Message button was tapped")})
                {
                    Image(systemName: "message.fill")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: 30)
                        .padding(.top)
                        .accentColor(.black)
                }
                
                Button(action: {
                        print("Settings button was tapped")})
                {
                    Image(systemName: "gearshape.fill")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: 30)
                        .padding(.top)
                        .accentColor(.black)
                }
            })

Answer 1

如果您使用的是 SwiftUI，则需要创建一个具有 .inline 显示模式的 NavigationView，这样您就不会使用 .large 并在滚动时获得大标题。

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("This is a View!")
            .navigationBarTitle("Elevate", displayMode: .inline) //set inline display
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button(action: {
                        if let url = NSURL(string: "tel://\(1234567890)"), UIApplication.shared.canOpenURL(url as URL) {
                            UIApplication.shared.openURL(url as URL)
                        }
                        print("Edit button was tapped")})
                    {
                        Image(systemName: "phone.fill")
                            .resizable()
                            .aspectRatio(contentMode: .fit)
                            .frame(width: 30)
                            .padding(.top)
                            .accentColor(.black)
                    }
                }
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button(action: {
                            print("Message button was tapped")})
                    {
                        Image(systemName: "message.fill")
                            .resizable()
                            .aspectRatio(contentMode: .fit)
                            .frame(width: 30)
                            .padding(.top)
                            .accentColor(.black)
                    }
                }
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button(action: {
                            print("Settings button was tapped")})
                    {
                        Image(systemName: "gearshape.fill")
                            .resizable()
                            .aspectRatio(contentMode: .fit)
                            .frame(width: 30)
                            .padding(.top)
                            .accentColor(.black)
                    }
                }
            }
        }
    }
}

如下所示：

使用 .large 而不是 .inline：

编辑：显示 SwiftUI 而不是 UIKit - 感谢 @jnpdx 指出 OP 的原始请求。