效果图
代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
| import UIKit
class ViewController: UIViewController {
var effectView : UIVisualEffectView!
var mySegcon : UISegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.cyanColor()
let image = UIImage(named: "test")
let imageView = UIImageView(frame: self.view.bounds)
imageView.image = image
self.view.addSubview(imageView)
mySegcon = UISegmentedControl(items: ["Dark", "ExtraLight", "Light"])
mySegcon.center = CGPointMake(self.view.center.x, self.view.bounds.maxY - 50)
mySegcon.backgroundColor = UIColor.grayColor()
mySegcon.tintColor = UIColor.whiteColor()
mySegcon.addTarget(self, action: "onClickMySegmentedControl:", forControlEvents: UIControlEvents.ValueChanged)
self.view.addSubview(mySegcon)
}
func addVirtualEffectView(effect : UIBlurEffect!){
if effectView != nil {
effectView.removeFromSuperview()
}
effectView = UIVisualEffectView(effect: effect)
effectView.frame = CGRectMake(0, 0, 200, 400)
effectView.layer.position = CGPointMake(mySegcon.bounds.midX, -(effectView.frame.midY + 20) )
effectView.layer.masksToBounds = true
effectView.layer.cornerRadius = 20.0
mySegcon.addSubview(effectView)
}
func onClickMySegmentedControl(sender : UISegmentedControl){
var effect : UIBlurEffect!
switch(sender.selectedSegmentIndex){
case 0:
effect = UIBlurEffect(style: UIBlurEffectStyle.Dark)
case 1:
effect = UIBlurEffect(style: UIBlurEffectStyle.Light)
case 2:
effect = UIBlurEffect(style: UIBlurEffectStyle.ExtraLight)
default:
println("Error")
}
self.addVirtualEffectView(effect)
}
}
|