Swift 访问按钮'；s@IB可从中检测变量'；s@IBAction

我正在故事板中创建打开URL的按钮视图，URL可以在Inspector中设置为每个按钮的@IBInspectable

我的问题是，我只能将按钮的操作连接到ViewController中的@iAction，自定义类CustomButton的变量或函数似乎无法从中访问

ViewController.swift

import UIKit

class ViewController: UIViewController {
@IBAction func openURL(sender: CustomButton) {
    let theURL = self.myURL; // accesses parent ViewController, not CustomButton, where the variable is defined for this view
    UIApplication.sharedApplication().openURL(NSURL(string: theURL)!)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

import UIKit

class CustomButton: UIButton {
    @IBInspectable var myURL: String?
    @IBInspectable var myPhone: String?
}

}

按钮。swift

import UIKit

class ViewController: UIViewController {
@IBAction func openURL(sender: CustomButton) {
    let theURL = self.myURL; // accesses parent ViewController, not CustomButton, where the variable is defined for this view
    UIApplication.sharedApplication().openURL(NSURL(string: theURL)!)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

import UIKit

class CustomButton: UIButton {
    @IBInspectable var myURL: String?
    @IBInspectable var myPhone: String?
}

改变

到

---

问问自己

self

是什么意思。