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?
Swift 5.1三视图示例
步骤:1 ->添加storyboard视图和outlet viewController UIView
@IBOutlet var firstView: UIView!
@IBOutlet var secondView: UIView!
@IBOutlet var thirdView: UIView!
步骤:2 ->添加storyBoard视图标签
步骤:3 ->添加手势
override func viewDidLoad() {
super.viewDidLoad()
firstView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
firstView.isUserInteractionEnabled = true
secondView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
secondView.isUserInteractionEnabled = true
thirdView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
thirdView.isUserInteractionEnabled = true
}
步骤:4 -> select view
@objc func tap(_ gestureRecognizer: UITapGestureRecognizer) {
let tag = gestureRecognizer.view?.tag
switch tag! {
case 1 :
print("select first view")
case 2 :
print("select second view")
case 3 :
print("select third view")
default:
print("default")
}
}
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
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")
}