脚本中的自定义AlertViewController

你需要以模式呈现它,所以让vc给出它的标识符并将其加载到任何地方

let vc = self.storyboard?.instantiateViewController(withIdentifier: "popupID") as! PopupViewController

vc.sendedStr = "someContent"

vc.myImage = UIImage(named:"flag.png")     

vc.providesPresentationContextTransitionStyle = true;

vc.definesPresentationContext = true;

vc.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext

self.present(vc, animated:true, completion: nil)

//

class PopupViewController : UIViewController {

    var sendedStr:String?

    var myImage:UIImage?      
}

更重要的是在ib中设置这样的视图背景

ViewController 不会一直占据整个屏幕。这只是默认设置。

套 .modalPresentationStyle 子控制器的属性 .overCurrentContext 并以模式呈现。

现在,如果您查看的控制器有一个透明的背景,它将显示为一个警告。

故事板中的第一个设计viewcontroller并记住viewcontroller主视图背景颜色应该是透明的,或者将其alpha更改为0.5。

在扩展下面添加

extension UIViewController {
    open func presentPOPUP(_ viewControllerToPresent: UIViewController, animated flag: Bool, modalTransitionStyle:UIModalTransitionStyle = .coverVertical, completion: (() -> Swift.Void)? = nil) {

        viewControllerToPresent.modalPresentationStyle = .overCurrentContext
        viewControllerToPresent.modalTransitionStyle = modalTransitionStyle

        self.present(viewControllerToPresent, animated: flag, completion: completion)

    }
}

之后你可以像下面这样使用它

if let alerVC = self.myStoryBoard.instantiateViewController(withIdentifier: "AlertMessageVC") as? AlertMessageVC {
       self.presentPOPUP(alerVC, animated: true, modalTransitionStyle: .crossDissolve, completion: nil)
}

您也可以将modalTransitionStyle更改为以下选项

 .coverVertical
 .flipHorizontal
 .crossDissolve
 .partialCurl

希望能帮上忙。:)