SwiftUINavigationViewnavigationBarTitleLayoutConstraints问题

这可能与最近推出的新 (12.3) 版本的 XCode 相关，但我有一个非常简单的 SwiftUI 视图：

import SwiftUI

struct HomeView: View {
    var body: some View {
        NavigationView {
            Text("Text")
                .navigationBarTitle("My Title")
        }
    }
}

我在控制台中收到此警告：

2020-12-15 18:25:06.506062-0800 Shopmatic[46177:9585655] [LayoutConstraints] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. 
    Try this: 
        (1) look at each constraint and try to figure out which you don't expect; 
        (2) find the code that added the unwanted constraint or constraints and fix it. 
(
    "<NSLayoutConstraint:0x600003636d00 'BIB_Trailing_CB_Leading' H:[_UIModernBarButton:0x7faf15d0dc30]-(6)-[_UIModernBarButton:0x7faf15c17500'Your Lists']   (active)>",
    "<NSLayoutConstraint:0x600003636d50 'CB_Trailing_Trailing' _UIModernBarButton:0x7faf15c17500'Your Lists'.trailing <= _UIButtonBarButton:0x7faf15c16140.trailing   (active)>",
    "<NSLayoutConstraint:0x600003631e50 'UINav_static_button_horiz_position' _UIModernBarButton:0x7faf15d0dc30.leading == UILayoutGuide:0x600002c18ee0'UIViewLayoutMarginsGuide'.leading   (active)>",
    "<NSLayoutConstraint:0x600003631ea0 'UINavItemContentGuide-leading' H:[_UIButtonBarButton:0x7faf15c16140]-(0)-[UILayoutGuide:0x600002c18e00'UINavigationBarItemContentLayoutGuide']   (active)>",
    "<NSLayoutConstraint:0x600003617160 'UINavItemContentGuide-trailing' UILayoutGuide:0x600002c18e00'UINavigationBarItemContentLayoutGuide'.trailing == _UINavigationBarContentView:0x7faf15e10000.trailing   (active)>",
    "<NSLayoutConstraint:0x600003632580 'UIView-Encapsulated-Layout-Width' _UINavigationBarContentView:0x7faf15e10000.width == 0   (active)>",
    "<NSLayoutConstraint:0x600003617520 'UIView-leftMargin-guide-constraint' H:|-(0)-[UILayoutGuide:0x600002c18ee0'UIViewLayoutMarginsGuide'](LTR)   (active, names: '|':_UINavigationBarContentView:0x7faf15e10000 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x600003636d00 'BIB_Trailing_CB_Leading' H:[_UIModernBarButton:0x7faf15d0dc30]-(6)-[_UIModernBarButton:0x7faf15c17500'Your Lists']   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.

这个简单的例子看起来不错，但是当我做一些更复杂的事情时：

import SwiftUI

struct ListDetailView: View {
    var list: List
    
    var body: some View {
        NavigationView {
            Text("Detail View")
            .navigationBarTitle("Detail View Title")
            .navigationBarTitleDisplayMode(.large)
            .navigationBarItems(
                trailing:
                    Button(action: {
                        print("Button Pressed")
                    }) {
                        Image(systemName: "ellipsis")
                }
            )
        }
    }
}

导航标题区域布局都搞砸了：

回答

       struct ContentView: View {
        var body: some View {
            NavigationView {
                VStack {
                    Text("Hello, world!")
                        .padding()
                    Spacer()
                }
                .navigationBarTitle("Hey there", displayMode: .inline)
            }
            .navigationViewStyle(StackNavigationViewStyle())
        }
    }

.navigationBarTitleDisplayMode(.inline)
.toolbar(content: {
     ToolbarItem(placement: .principal, content: {
     Text("Title")
  })})    

回答

var body: some View {
        NavigationView{
            Text("Hopefully will work this time")
                .navigationTitle("Error with constains")
        }
    }

var body: some View {
        NavigationView{
            Text("Yes it does!")
                .navigationTitle("Wow it works")
        }
    }.navigationViewStyle(StackNavigationViewStyle())

回答

import SwiftUI

struct HomeView: View {
    var body: some View {
        NavigationView {
            Text("Text")
                .navigationBarTitle("Hey there", displayMode: .inline)
        }
        .navigationViewStyle(StackNavigationViewStyle())
    }
}