ios - 如何向 subview 属性 Swift 添加操作？

Question

这个问题已经有答案了:

Xcode - Terminating with uncaught exception of type NSException when a button is pressed (4 个回答)

已关闭 7 年前。

我对 Swift 比较陌生，我想向我的自定义添加一系列操作 UIView按钮

这是代码，但是当我按下按钮时，我会收到此错误。

请告诉我对此进行建模的最佳实践。

class CameraView: UIView {

    var cameraButton : UIButton?

    convenience init() {
        self.init(frame: CGRectZero)
        self.backgroundColor = UIColor.clearColor()

        cameraButton = UIButton()

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
    }


    func setButton(button : UIButton){
        self.cameraButton = button
    }


    func setUpMyView(){
        self.cameraButton = UIButton()
        self.cameraButton?.layer.cornerRadius = 30
        self.cameraButton?.layer.borderWidth = 5
        self.cameraButton?.backgroundColor = UIColor.clearColor()
        self.cameraButton?.layer.borderColor = UIColor.whiteColor().CGColor

        self.addSubview(cameraButton!)
    }

}


ViewController.swift


import UIKit

class ViewController: UIViewController {

    var cameraView : CameraView?

    override func viewDidLoad() {
        super.viewDidLoad()

        cameraView = CameraView()

        cameraView?.cameraButton?.addTarget(self, action: "pressed", forControlEvents: .TouchUpInside)

        self.view = cameraView

    }

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


    func pressed(sender : AnyObject!){
        print("Button Pressed")
        let alert = UIAlertController(title: "Alert", message: "Another Alert", preferredStyle: .Alert)
        let action = UIAlertAction(title: "Ok", style: .Default, handler: nil)
        alert.addAction(action)

        self.presentViewController(alert, animated: true , completion: nil)
    }

}

错误

2016-01-16 14:00:42.023 TPProject[4194:1442964] -[TPProject.ViewController pressed]: unrecognized selector sent to instance 0x125655a302016-01-16 14:00:42.028 TPProject[4194:1442964] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[TPProject.ViewController pressed]: unrecognized selector sent to instance 0x125655a30'*** First throw call stack:(0x183d39900 0x1833a7f80 0x183d4061c 0x183d3d5b8 0x183c4168c 0x188a63e50 0x188a63dcc 0x188a4ba88 0x188a636e4 0x188a63314 0x188a5be30 0x188a2c4cc 0x188a2a794 0x183cf0efc 0x183cf0990 0x183cee690 0x183c1d680 0x18512c088 0x188a94d90 0x1000adf64 0x1837be8b8)libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

我找到了解决办法。我必须在操作中添加 :

从这条线

cameraView?.cameraButton?.addTarget(self, action: "pressed", forControlEvents: .TouchUpInside)

到

cameraView?.cameraButton?.addTarget(self, action: "pressed:", forControlEvents: .TouchUpInside)