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?
以下是在Swift 5中添加手势视图的最简单方法
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
addGestures()
}
// MARK: Add Gestures to target view
func addGestures()
{
// 1. Single Tap or Touch
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.tapGetstureDetected))
tapGesture.numberOfTapsRequired = 1
view.addGestureRecognizer(tapGesture)
//2. Double Tap
let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(self.doubleTapGestureDetected))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)
//3. Swipe
let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(self.swipeGetstureDetected))
view.addGestureRecognizer(swipeGesture)
//4. Pinch
let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(self.pinchGetstureDetected))
view.addGestureRecognizer(pinchGesture)
//5. Long Press
let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.longPressGetstureDetected))
view.addGestureRecognizer(longPressGesture)
//6. Pan
let panGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.panGestureDetected))
view.addGestureRecognizer(panGesture)
}
// MARK: Handle Gesture detection
@objc func swipeGetstureDetected() {
print("Swipe Gesture detected!!")
}
@objc func tapGetstureDetected() {
print("Touch/Tap Gesture detected!!")
}
@objc func pinchGetstureDetected() {
print("Pinch Gesture detected!!")
}
@objc func longPressGetstureDetected() {
print("Long Press Gesture detected!!")
}
@objc func doubleTapGestureDetected() {
print("Double Tap Gesture detected!!")
}
@objc func panGestureDetected()
{
print("Pan Gesture detected!!")
}
//MARK: Shake Gesture
override func becomeFirstResponder() -> Bool {
return true
}
override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?){
if motion == .motionShake
{
print("Shake Gesture Detected")
}
}
}
实现轻触手势
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "touchHappen")
view.userInteractionEnabled = true
view.addGestureRecognizer(tap)
当点击被识别时调用此函数。
func touchHappen() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
self.view.endEditing(true)
}
针对Swift 3 +的更新
let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchHappen(_:)))
yourView.addGestureRecognizer(tap)
yourView.userInteractionEnabled = true
func touchHappen(_ sender: UITapGestureRecognizer) {
print("Hello Dear you are here")
}