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
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
}
其他回答
这是它在Swift 3中的工作原理:
@IBOutlet var myView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action:#selector(handleTap))
myView.addGestureRecognizer(tap)
}
func handleTap() {
print("tapped")
}
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)
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")
}
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")
}
而不是调用myView的UITapGestureRecognizer，你可以直接调用handleTap函数，
