iOS 启动屏幕情节提要更改了用户界面其余部分的约束

不幸的是，您的应用程序是为一个特定设备设计的......

我尝试了一下（基本上）将整个应用程序放入“容器”视图中，但结果不是很好。

如果你想看到大致的想法 - 你也许可以让它为你工作......

添加一个 ：RootContainerViewController

RootContainerViewController.h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface RootContainerViewController : UIViewController

@property (nonatomic, strong) UIView *container;

@end

NS_ASSUME_NONNULL_END

根容器视图控制器.m

#import "RootContainerViewController.h"

@interface RootContainerViewController ()

@end

@implementation RootContainerViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor blackColor];
    
    self.container = [UIView new];
    self.container.backgroundColor = [UIColor redColor];
    [self.container setTranslatesAutoresizingMaskIntoConstraints:NO];
    [self.view addSubview:self.container];
    
    UILayoutGuide *g = [self.view safeAreaLayoutGuide];
    
    [NSLayoutConstraint activateConstraints:@[
        
        [self.container.topAnchor constraintEqualToAnchor:g.topAnchor constant:0.0],
        [self.container.bottomAnchor constraintEqualToAnchor:g.bottomAnchor constant:0.0],
        [self.container.widthAnchor constraintEqualToAnchor:self.container.heightAnchor multiplier:1024.0 / 768.0],
        [self.container.centerXAnchor constraintEqualToAnchor:g.centerXAnchor],
        
    ]];

}

- (UIStatusBarStyle)preferredStatusBarStyle {
    if (@available(iOS 13.0, *)) {
        return UIStatusBarStyleLightContent;
    } else {
        // Fallback on earlier versions
    }
}

@end

并将你的 ApplicationDelegate_Pad.m 更改为：

#import "ApplicationDelegate_Pad.h"
#import "MPRootViewController.h"
#import "MPDetailViewController.h"

#import "RootContainerViewController.h"

@implementation ApplicationDelegate_Pad

@synthesize tabBarController;
@synthesize splitViewController;
@synthesize rootViewController;
@synthesize detailViewController;
@synthesize splitViewControllerD;

-(void) makeSplitViewController {
    
    // Create an array of controllers that will correspond to each tab in the tab bar vc.
    NSMutableArray *controllers = [NSMutableArray arrayWithArray:self.tabBarController.viewControllers];
    
    int index = 0; 
    for (UIViewController *controller in self.tabBarController.viewControllers) {
        
        // Set the split vc in the Presentation tab to hold the playlist in the root vc and the presenter controls in the detail vc.
        if (index == 0) {
            // Set up a storyboard for the root vc and initialize the root vc.
            UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"PlaylistVC" bundle:nil];
            self.rootViewController = [storyboard instantiateInitialViewController];
            
            // Initialize the detail vc and assign it to the root vc.
            detailViewController = [[MPDetailViewController alloc] initWithNibName:@"MPDetailViewController" bundle:nil];
            self.rootViewController.detailViewController = self.detailViewController;
            
            // Set up a split vc to hold the root vc and detail vc we just created.
            splitViewController = [[UISplitViewController alloc] init];
            self.splitViewController.tabBarItem = controller.tabBarItem;
            self.splitViewController.viewControllers = @[self.rootViewController, self.detailViewController];
            
            // Set the split vc's delegate.
            self.splitViewController.delegate = self.detailViewController;
            
            // Other.
            self.splitViewController.presentsWithGesture = NO;
            
            // limit Primary Column Width to 320
            [self.splitViewController setMaximumPrimaryColumnWidth:320.0];
            
            // Add the split vc to the list of controllers that will correspond to each tab in tab bar vc).
            controllers[index] = self.splitViewController;
        }
        
        // Set the split vc in the Datasets tab.
        if (index == 1) {
            // Set up a storyboard for the root vc and initialize the root vc.
            UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"DatasetsVC" bundle:nil];
            self.splitViewControllerD = [storyboard instantiateViewControllerWithIdentifier:@"DatasetsVC"];
            
            // Set the title and icon of the Datasets tab bar item.  Tried to do this in Interface Builder, but it would
            // always show up blank.
            self.splitViewControllerD.tabBarItem.title = @"Data Catalog";
            
            // Add the split vc to the list of controllers that will correspond to each tab in tab bar vc.
            controllers[index] = self.splitViewControllerD;
        }
        
        index++;
    }
    
    // Set the tab bar's array of vc's with the split vc's controllers we just created.
    self.tabBarController.viewControllers = controllers;
    self.tabBarController.delegate = self;
    self.tabBarController.viewControllers = controllers;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    
    // Override point for customization after application launch.
    [super application:application didFinishLaunchingWithOptions:launchOptions];

    // This helps us to get a split view controller inside a tab.
    [self makeSplitViewController];
    
    // setup a new Root controller with a "container" view
    if (YES) {
        
        // instantiate RootContainerViewController
        RootContainerViewController *vc = [RootContainerViewController new];
        
        [vc loadViewIfNeeded];
        
        // add tabBarController as child of RootContainerViewController
        [vc addChildViewController:self.tabBarController];
        
        // add tabBarController's view to container
        [vc.container addSubview:self.tabBarController.view];
        // resizing mask
        [self.tabBarController.view setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
        // set frame to container bounds
        [self.tabBarController.view setFrame:vc.container.bounds];
        // finsish child load
        [self.tabBarController didMoveToParentViewController:vc];
        
        // window rootViewController is now RootContainerViewController instead of tabBarController
        self.window.rootViewController = vc;

    } else {

        // Set the window view to the tab bar vc.
        self.window.rootViewController = self.tabBarController;
        [self.window addSubview:self.tabBarController.view];

    }
    
    // Make the receiver the main window and display it in front of other windows.
    [self.window makeKeyAndVisible];
    
    // iOS 15 added a default vertical content offset (i.e., padding) for table views that is non-zero that
    // pushes the table view down. Force this offset to be zero for all table views.
    if (@available(iOS 15.0, *)) {
        UITableView.appearance.sectionHeaderTopPadding = 0;
    }
    
    
    
    return YES;
}

#pragma mark - Memory management

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
    /*
     Free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later.
     */
}

@end

结果...

首先，使用原始的 App Delegate 代码，而不使用：LaunchScreen

然后，*使用修改后的 App Delegate 代码：LaunchScreen

乍一看，它似乎可能会起作用，但是......拆分视图控制器的“辅助”窗格未正确调整大小（请注意，“叠加”按钮不可见，因为它超出了视图的边界）。

值得一提的是，苹果的文档指出：

尽管可以在其他一些容器视图控制器中将拆分视图控制器作为子级安装，但在大多数情况下不建议这样做。

因此，使用分屏视图控制器作为选项卡栏控制器中的选项卡会给该过程带来另一个麻烦。

您可能想尝试容器的想法，但我对它没有抱太大希望（不知道您的实际应用程序中还可能受到哪些影响）。

我认为你只需要“咬紧牙关”，重组你的应用程序才能在现代设备上运行。