Swift 基础之：手势识别

发表于 更新于 分类于 阅读次数： Disqus：
Swift 基础之：手势识别。

APP 中可能会用到某个按钮的长按和短按的功能，以下为 Swift 4 的简单实现。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
@IBOutlet var button: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(normalTap(_:)))
    tapGesture.numberOfTapsRequired = 1
    button.addGestureRecognizer(tapGesture)
    let longGesture = UILongPressGestureRecognizer(target: self, action: #selector(longTap(_:)))
    button.addGestureRecognizer(longGesture)
}

@objc func normalTap(_ sender: UIGestureRecognizer){
    // do something
}

@objc func longTap(_ sender: UIGestureRecognizer){
    if sender.state == .ended {
        // do someting
    } else if sender.state == .began {
        // do something
    }
}