下面是Objective-C的解决方案

UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
ViewController *vc = [storyBoard instantiateViewControllerWithIdentifier:@"ViewController"];

vc.modalPresentationStyle = UIModalPresentationFullScreen;

[self presentViewController:vc animated:YES completion:nil];

这对我很有效

let vc = self.storyboard?.instantiateViewController(withIdentifier: "storyboardID_cameraview1") as! CameraViewController
  
vc.modalPresentationStyle = .fullScreen
    
self.present(vc, animated: true, completion: nil)`

一个衬套:

modalPresentationStyle需要在正在呈现的navigationController上设置。

iOS 13及以下的iOS版本fullScreen with overCurrentContext和 导航控制器

经过测试的代码

let controller = UIViewController()
let navigationController = UINavigationController(rootViewController: controller)
navigationController.modalPresentationStyle = .overCurrentContext
self.navigationController?.present(navigationController, animated: true, completion: nil)

modalPresentationStyle需要设置在navigationController。

快速的解决方案。上面已经有了很好的答案。我还添加了我的快速2点输入，在截图中显示。

如果你不使用导航控制器，那么从右菜单检查器将显示设置为全屏 如果你使用导航控制器，那么默认情况下它会显示全屏，你什么都不用做。

设置导航控制器。modalPresentationStyle到。fullscreen已经重复了一千多次了，但让我给你们展示另一个阻止器，它会导致UIViewController / UINavigationController没有在全屏显示，即使所有的属性都设置正确。

对我来说，罪魁祸首就藏在这条线里

navigationController?.presentationController?.delegate = self

显然，当设置UIAdaptivePresentationControllerDelegate时，你需要在可选的delegate方法中指定表示样式

    public func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
        presentationStyle
    }

这是我在objective - c中使用类别的修复版本。使用这种方法，你将拥有默认的UIModalPresentationStyleFullScreen行为，直到另一个显式设置。

#import "UIViewController+Presentation.h"
#import "objc/runtime.h"

@implementation UIViewController (Presentation)

- (void)setModalPresentationStyle:(UIModalPresentationStyle)modalPresentationStyle {
    [self setPrivateModalPresentationStyle:modalPresentationStyle];
}

-(UIModalPresentationStyle)modalPresentationStyle {
    UIModalPresentationStyle style = [self privateModalPresentationStyle];
    if (style == NSNotFound) {
        return UIModalPresentationFullScreen;
    }
    return style;
}

- (void)setPrivateModalPresentationStyle:(UIModalPresentationStyle)modalPresentationStyle {
    NSNumber *styleNumber = [NSNumber numberWithInteger:modalPresentationStyle];
     objc_setAssociatedObject(self, @selector(privateModalPresentationStyle), styleNumber, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (UIModalPresentationStyle)privateModalPresentationStyle {
    NSNumber *styleNumber = objc_getAssociatedObject(self, @selector(privateModalPresentationStyle));
    if (styleNumber == nil) {
        return NSNotFound;
    }
    return styleNumber.integerValue;
}

@end