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
对于正在寻找Swift 3解决方案的任何人
let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
view.addGestureRecognizer(tap)
view.isUserInteractionEnabled = true
self.view.addSubview(view)
// function which is triggered when handleTap is called
@objc func handleTap(_ sender: UITapGestureRecognizer) {
print("Hello World")
}
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: "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
}
试试下面的扩展
extension UIView {
func addTapGesture(action : @escaping ()->Void ){
let tap = MyTapGestureRecognizer(target: self , action: #selector(self.handleTap(_:)))
tap.action = action
tap.numberOfTapsRequired = 1
self.addGestureRecognizer(tap)
self.isUserInteractionEnabled = true
}
@objc func handleTap(_ sender: MyTapGestureRecognizer) {
sender.action!()
}
}
class MyTapGestureRecognizer: UITapGestureRecognizer {
var action : (()->Void)? = nil
}
然后使用它:
submitBtn.addTapGesture {
//your code
}
你甚至可以把它用于cell
cell.addTapGesture {
//your code
}
xCode 9.3, Swift 4.0
class BaseVC: UIViewController, UIGestureRecognizerDelegate {
@IBOutlet weak var iView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
let clickUITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.onSelect(_:)))
clickUITapGestureRecognizer.delegate = self
iView?.addGestureRecognizer(tap)
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
return true
}
@IBAction func onSelect(_ sender: Any) {
}
}
斯威夫特4
let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchTapped(_:)))
self.view.addGestureRecognizer(tap)
@objc func touchTapped(_ sender: UITapGestureRecognizer) {
}
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
}
