ios - 如何减少 UIVisualEffectView 上的模糊效果

Question

如何减少 UIVisualEffectView 上的模糊效果，它为我提供了光、额外光和暗的选项，这对我来说还不够好，我正在尝试实现这样的目标

Answer 1

我们完全可以使用动画师以本地方式做到这一点，并具有正确的预期外观

用法:

let blurEffectView = BlurEffectView()
view.addSubview(blurEffectView)

BlurEffectView实现:

class BlurEffectView: UIVisualEffectView {
    
    var animator = UIViewPropertyAnimator(duration: 1, curve: .linear)
    
    override func didMoveToSuperview() {
        guard let superview = superview else { return }
        backgroundColor = .clear
        frame = superview.bounds //Or setup constraints instead
        setupBlur()
    }
    
    private func setupBlur() {
        animator.stopAnimation(true)
        effect = nil

        animator.addAnimations { [weak self] in
            self?.effect = UIBlurEffect(style: .dark)
        }
        animator.fractionComplete = 0.1   //This is your blur intensity in range 0 - 1
    }
    
    deinit {
        animator.stopAnimation(true)
    }
}