我有一个UIView并且我添加了点击手势
let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
tap.delegate = self
myView.addGesture(tap)
我试图在testfile中以编程方式调用它。
sendActionForEvent
我正在使用这个函数，但它不起作用:
myView.sendActionForEvent(UIEvents.touchUpDown)
它显示未识别的选择器发送到实例。
我该如何解决这个问题呢?
当前回答
1 .
@IBOutlet var viewTap: UIView!
2 .
var tapGesture = UITapGestureRecognizer()
3 .
override func viewDidLoad() {
super.viewDidLoad()
// TAP Gesture
tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.myviewTapped(_:)))
tapGesture.numberOfTapsRequired = 1
tapGesture.numberOfTouchesRequired = 1
viewTap.addGestureRecognizer(tapGesture)
viewTap.isUserInteractionEnabled = true
}
4 .
func myviewTapped(_ sender: UITapGestureRecognizer) {
if self.viewTap.backgroundColor == UIColor.yellow {
self.viewTap.backgroundColor = UIColor.green
}else{
self.viewTap.backgroundColor = UIColor.yellow
}
}
输出
其他回答
你需要用目标和动作初始化UITapGestureRecognizer，如下所示:
let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
myView.addGestureRecognizer(tap)
然后，你应该实现处理程序，它将在每次tap事件发生时被调用:
@objc func handleTap(_ sender: UITapGestureRecognizer? = nil) {
// handling code
}
所以现在调用你的点击手势识别器事件处理程序就像调用一个方法一样简单:
handleTap()
注意:不要忘记在视图上启用交互:
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap))
view.addGestureRecognizer(tap)
// view.userInteractionEnabled = true
self.view.addSubview(view)
我是在swift上的Xcode 6.4上完成的。见下文。
var view1: UIView!
func assignTapToView1() {
let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap"))
// tap.delegate = self
view1.addGestureRecognizer(tap)
self.view .addSubview(view1)
...
}
func handleTap() {
print("tap working")
view1.removeFromSuperview()
// view1.alpha = 0.1
}
内部ViewDidLoad
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
self.imgMainAdView.isUserInteractionEnabled = true
self.imgMainAdView.addGestureRecognizer(tapGestureRecognizer)
//MARK: - Image Tap Method -
@objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer)
{
print("Tapped")
if let url = URL(string: self.strMAinAdvLink)
{
UIApplication.shared.open(url, options: [:])
}
}
打电话的目的
@IBAction func btnCall1Action(_ sender: Any)
{
let text = self.strPhoneNumber1!
let test = String(text.filter { !" -()".contains($0) })
UIApplication.shared.openURL(NSURL(string: "tel://\(test)")! as URL)
}
邮件的目的
MFMailComposeViewControllerDelegate
@IBAction func btnMailAction(_ sender: Any)
{
let strEmail = SAFESTRING(str: (self.dictEventDetails?.value(forKeyPath: "Email.value_text.email") as! String))
if !MFMailComposeViewController.canSendMail()
{
AppDelegate.sharedInstance().showAlertAction(strTitle: "OK", strMessage: "Mail services are not available") { (success) in
}
return
}
let composeVC = MFMailComposeViewController()
composeVC.mailComposeDelegate = self
composeVC.setToRecipients([strEmail])
composeVC.setSubject("")
composeVC.setMessageBody("", isHTML: false)
self.present(composeVC, animated: true, completion: nil)
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?)
{
controller.dismiss(animated: true, completion: nil)
}
1 .
@IBOutlet var viewTap: UIView!
2 .
var tapGesture = UITapGestureRecognizer()
3 .
override func viewDidLoad() {
super.viewDidLoad()
// TAP Gesture
tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.myviewTapped(_:)))
tapGesture.numberOfTapsRequired = 1
tapGesture.numberOfTouchesRequired = 1
viewTap.addGestureRecognizer(tapGesture)
viewTap.isUserInteractionEnabled = true
}
4 .
func myviewTapped(_ sender: UITapGestureRecognizer) {
if self.viewTap.backgroundColor == UIColor.yellow {
self.viewTap.backgroundColor = UIColor.green
}else{
self.viewTap.backgroundColor = UIColor.yellow
}
}
输出
