Question

我想创建一个带有模糊和约束的UIImageView。但模糊不想使用约束。

我的代码：

    var notifBackground: UIImageView!
    notifBackground = UIImageView()
    notifBackground.backgroundColor = UIColor.clear
    view.addSubview(notifBackground)

    notifBackground.translatesAutoresizingMaskIntoConstraints = false
    notifBackground.widthAnchor.constraint(equalToConstant: 200).isActive = true
    notifBackground.heightAnchor.constraint(equalToConstant: 200).isActive = true
    notifBackground.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
    notifBackground.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true

    let blur = UIVisualEffectView(effect: UIBlurEffect(style: UIBlurEffectStyle.regular))
    blur.frame = notifBackground.bounds
    view.addSubview(blur)

Answer 1

当您将模糊的边界设置为imageview的相同边界时，尚未处理布局约束。你要做的就是为模糊设置类似的约束。通过这样做，模糊将具有类似的边界并出现在图像视图的顶部。

Answer 2

BLUR EFFECT

let blur = UIBlurEffect(style: UIBlurEffectStyle.regular)
            let blurView = UIVisualEffectView(effect: blur)
            blurView.frame = view.bounds
            blurView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
            view.addSubview(blurView)

UIImageView，约束和以编程方式模糊

2 个答案: