键盘可见/不可见时显示/隐藏navigationBarItems | SwiftUI

import SwiftUI

struct ContentView: View {
    @State private var isKeyboardVisible = false
    
    var body: some View {
        NavigationView {
            VStack {
                Text("Content")
            }
            .navigationBarTitle("Title")
            .navigationBarItems(trailing:
                Button(action: {
                    // 按钮操作
                }) {
                    Image(systemName: "plus")
                }
                .opacity(isKeyboardVisible ? 0 : 1) // 根据键盘可见性设置透明度
                .disabled(isKeyboardVisible) // 根据键盘可见性禁用按钮
            )
            .keyboardObserving { isVisible in
                self.isKeyboardVisible = isVisible
            }
        }
    }
}