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?
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)
}
你需要用目标和动作初始化UITapGestureRecognizer,如下所示:
let tap = UITapGestureRecognizer(target: self, action: "handleTap:")
tap.delegate = self
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:
func handleTap(sender: UITapGestureRecognizer) {
// handling code
}
斯威夫特4
首先,创建一个UITapGestureRecognizer对象
var tapGesture = UITapGestureRecognizer()
第二步是初始化UITapGestureReconizer。启用用户
交互,然后添加它。
override func viewDidLoad() {
super.viewDidLoad()
tapGesture = UITapGestureRecognizer(target: self, action: #selector(YourViewController.myviewTapped(_:)))
infosView.isUserInteractionEnabled = true
infosView.addGestureRecognizer(tapGesture)
view.addSubview(infosView)
}
第三,创建一个方法
@objc func myviewTapped(_ recognizer: UIGestureRecognizer) {
print("button is tapped")
}
试试下面的swift代码(在Xcode 6.3.1中测试):
import UIKit
class KEUITapGesture150427 : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTap = UITapGestureRecognizer(target: self
, action: Selector("_myHandleTap:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
func _myHandleTap(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
注意,你的目标可以是UIResponder的任何子类,参见(在Xcode 6.3.1中测试):
import UIKit
class MyTapTarget : UIResponder {
func _myHandleTap2(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap2(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
class KEUITapGesture150427b : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
var _myTapTarget: MyTapTarget?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTapTarget = MyTapTarget()
_myTap = UITapGestureRecognizer(target: _myTapTarget!
, action: Selector("_myHandleTap2:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
}