参考以下代码
import UIKit
class BaseViewController: UIViewController {
let button = UIButton(frame: CGRect(x: 100, y: 150, width: 120, height: 50))
override func viewDidLoad() {
super.viewDidLoad()
button.backgroundColor = UIColor.blueColor()
button.setImage(UIImage(named: "2.jpg"), forState: .Highlighted)
button.addTarget(self, action: #selector(buttonTapped(_:)), forControlEvents: .TouchUpInside)
view.addSubview(button)
}
func buttonTapped(sender: UIButton) {
print("hello")
}
}
你的 swift 是哪个版本? 如果是 2.2:
button.addTarget(self, action: #selector(buttonTapped), forControlEvents: .TouchUpInside)
如果是 2.2 之前的版本:
button.addTarget(self, action: "buttonTapped:", forControlEvents: .TouchUpInside)
我没有测试具体的语法, 但是大致上应该是这样的。