swift4--使用UIBlurEffect给图片加模糊效果(毛玻璃)_swift uiblureffect

纯代码的方式写：

效果图

下面是代码：  

import UIKit
 
class ViewController: UIViewController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
 
        let image = UIImage(named: "img1")
        let imageView = UIImageView(image: image)
        imageView.frame = CGRect(x: 0, y: 0, width: 300, height: 500)
        self.view.addSubview(imageView)
        
//        初始化一个模糊效果对象（可以制作毛玻璃效果）
        let blur = UIBlurEffect(style: .light)
//        初始化一个基于模糊效果的视觉效果视图
        let blurView = UIVisualEffectView(effect: blur)
        blurView.frame = CGRect(x: 40, y: 40, width: 200, height: 200)
        blurView.layer.cornerRadius = 30
        blurView.layer.masksToBounds = true
        imageView.addSubview(blurView)
 
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
 
 
}

storyboard的方式：

效果图

用到的控件