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
斯威夫特4
let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchTapped(_:)))
self.view.addGestureRecognizer(tap)
@objc func touchTapped(_ sender: UITapGestureRecognizer) {
}
其他回答
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")
}
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
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")
}
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
}
我使用的是Xcode 7.3.1, Swift 2.2。见下文。
func addTapGesture() {
let tap = UITapGestureRecognizer(target: self, action: #selector(MyViewController.handleTap))
tap.numberOfTapsRequired = 1
self.myView.addGestureRecognizer(tap)
}
func handleTap() {
// Your code here...
}
