ios - 获取线程1 : signal sigabrt when trying to use tap gesture recognizer to open url

Question

我正在尝试使用点击手势识别器在点击图像时打开 URL。代码构建成功，但当我尝试点击图像时，它终止并显示

terminating with uncaught exception of type NSException (lldb)

在控制台中。控制台还显示

[Hello.ViewController clickToOpen]: unrecognized selector sent to instance.

还有一个

Thread 1: signal SIGABRT

在行

class AppDelegate: UIResponder, UIApplicationDelegate {" in AppDelegate.swift.

ViewController 代码如下:

//
//  ViewController.swift
//  Hello
//

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

//MARK: Outlets
@IBOutlet weak var nameTextField: UITextField!
@IBOutlet weak var helloName: UILabel!
@IBOutlet weak var imageToTap: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    nameTextField.delegate = self

    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: Selector(("clickToOpen")))
    self.imageToTap.addGestureRecognizer(tapGestureRecognizer)
    self.imageToTap.isUserInteractionEnabled = true
}

//MARK: UITextFieldDelegate
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    // Hide the keyboard
    textField.resignFirstResponder()

    return true 
}
func textFieldDidEndEditing(_ textField: UITextField) {
    helloName.text = "Hello \(textField.text!)"
    textField.text = ""
}

//MARK: Actions
@IBAction func clearButton(_ sender: UIButton) {
    helloName.text = "Hello"
}
@IBAction func enterButton(_ sender: UIButton) {
    nameTextField.resignFirstResponder()
}
@IBAction func clickToOpen(_ sender: UITapGestureRecognizer) {
     if let url = NSURL(string: "http://www.google.com/") {
        UIApplication.shared.openURL(url as URL)
    }

}

}

Answer 1

替换您的点击手势代码，从 swift 3.x 开始，您需要使用 #selector

    let tapGesture = UITapGestureRecognizer.init(target: self, action: #selector(clickToOpen))
    self.view.addGestureRecognizer(tapGesture)