let Obj = MtViewController()
Obj.modalPresentationStyle = .overFullScreen
self.present(Obj, animated: true, completion: nil)

//如果你想禁用滑动来消除它，添加行

Obj.isModalInPresentation = true

查看苹果文档获取更多信息。

我在ios 13中使用了swizzling

import Foundation
import UIKit

private func _swizzling(forClass: AnyClass, originalSelector: Selector, swizzledSelector: Selector) {
    if let originalMethod = class_getInstanceMethod(forClass, originalSelector),
       let swizzledMethod = class_getInstanceMethod(forClass, swizzledSelector) {
        method_exchangeImplementations(originalMethod, swizzledMethod)
    }
}

extension UIViewController {

    static let preventPageSheetPresentation: Void = {
        if #available(iOS 13, *) {
            _swizzling(forClass: UIViewController.self,
                       originalSelector: #selector(present(_: animated: completion:)),
                       swizzledSelector: #selector(_swizzledPresent(_: animated: completion:)))
        }
    }()

    @available(iOS 13.0, *)
    @objc private func _swizzledPresent(_ viewControllerToPresent: UIViewController,
                                        animated flag: Bool,
                                        completion: (() -> Void)? = nil) {
        if viewControllerToPresent.modalPresentationStyle == .pageSheet
                   || viewControllerToPresent.modalPresentationStyle == .automatic {
            viewControllerToPresent.modalPresentationStyle = .fullScreen
        }
        _swizzledPresent(viewControllerToPresent, animated: flag, completion: completion)
    }
}

然后放这个

UIViewController.preventPageSheetPresentation

的某个地方

例如在AppDelegate中

func application(_ application: UIApplication,
                 didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]?) -> Bool {

    UIViewController.preventPageSheetPresentation
    // ...
    return true
}

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];

以上的答案和建议是正确的，下面是另一个版本，和有效的方法使用编程。

创建一个UIView扩展

创建一个方法()

//#1
extension UIViewController {

//#2
func presentLocal(_ viewControllerToPresent: UIViewController, animated flag: 
Bool, completion: (() -> Void)? = nil) {

//Reusing below 2 lines :-)
viewControllerToPresent.modalPresentationStyle = .overCurrentContext
self.present(viewControllerToPresent, animated: flag, completion: completion)

  }
}

调用如下所示

let vc = MyViewController()
let nc = UINavigationController(rootViewController: vc)
sourceView.presentLocal(nc, animated: true, completion: nil)

OR

let vc = MyViewController()
sourceView.presentLocal(vc, animated: true, completion: nil)

class MyViewController: UIViewController {

    convenience init() {
        self.init(nibName:nil, bundle:nil)
        self.modalPresentationStyle = .fullScreen
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

而不是调用self。modalPresentationStyle = . fullscreen对于每个视图控制器，你可以子类化UIViewController并在任何地方使用MyViewController。

所有其他答案都足够了，但对于像我们这样的大型项目，导航是在代码和故事板中完成的，这是一项相当艰巨的任务。

对于那些积极使用Storyboard的人。这是我的建议:使用正则表达式。

以下格式不适用于全屏页面:

<segue destination="Bof-iQ-svK" kind="presentation" identifier="importSystem" modalPresentationStyle="fullScreen" id="bfy-FP-mlc"/>

以下格式适用于全屏页面:

<segue destination="7DQ-Kj-yFD" kind="presentation" identifier="defaultLandingToSystemInfo" modalPresentationStyle="fullScreen" id="Mjn-t2-yxe"/>

以下与VS CODE兼容的正则表达式将所有旧样式页面转换为新样式页面。如果您正在使用其他正则表达式引擎/文本编辑器，则可能需要转义特殊字符。

搜索正则表达式

<segue destination="(.*)"\s* kind="show" identifier="(.*)" id="(.*)"/>

正则表达式替换

<segue destination="$1" kind="presentation" identifier="$2" modalPresentationStyle="fullScreen" id="$3"/>