[英]UIViewController blur background turns into gray
I would like to use blur background for my view controller but as soon as the view is loaded, the whole thing turns into gray. 我想为我的视图控制器使用模糊背景,但是一旦视图被加载,整个东西就会变成灰色。
I present the view controller by performing a segue from another view, and in the viewDidLoad()
method of the view controller, I implement the blur effect as given below 我通过从另一个视图执行搜索来呈现视图控制器,并且在视图控制器的
viewDidLoad()
方法中,实现了如下所示的模糊效果
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.clear
let blurBgView = UIVisualEffectView(effect: UIBlurEffect(style: .extraLight))
blurBgView.translatesAutoresizingMaskIntoConstraints = false
view.insertSubview(blurBgView, at: 0)
NSLayoutConstraint.activate([
blurBgView.heightAnchor.constraint(equalTo: view.heightAnchor),
blurBgView.widthAnchor.constraint(equalTo: view.widthAnchor),
])
}
This is how it looks like 看起来像这样
How can I implement a blur background for my view controller? 如何为视图控制器实现模糊背景?
I use XCode 9.3, Swift 4.1 我使用XCode 9.3,Swift 4.1
Thanks 谢谢
Present your view controller and set its modalPresentationStyle
from your initial vc: 展示您的视图控制器,并从初始vc设置其
modalPresentationStyle
:
let newController = NewViewController()
newController.modalPresentationStyle = .overCurrentContext
present(newController, animated: true, completion: nil)
Or, if you are preparing for the segue: 或者,如果您正在准备进行测试:
let newController: NewViewController = segue.destination as! NewViewController
newController.modalPresentationStyle = .overCurrentContext
And in the NewViewController
class in viewDidLoad()
add your code. 并在
viewDidLoad()
的NewViewController
类中添加您的代码。
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