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swift代码(在Xcode 6.3.1中测试):
import UIKit
class KEUITapGesture150427 : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTap = UITapGestureRecognizer(target: self
, action: Selector("_myHandleTap:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
func _myHandleTap(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
注意，你的目标可以是UIResponder的任何子类，参见(在Xcode 6.3.1中测试):
import UIKit
class MyTapTarget : UIResponder {
func _myHandleTap2(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap2(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
class KEUITapGesture150427b : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
var _myTapTarget: MyTapTarget?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTapTarget = MyTapTarget()
_myTap = UITapGestureRecognizer(target: _myTapTarget!
, action: Selector("_myHandleTap2:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
}
其他回答
斯威夫特4
let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchTapped(_:)))
self.view.addGestureRecognizer(tap)
@objc func touchTapped(_ sender: UITapGestureRecognizer) {
}
对于任何想要激活视图点击手势识别器而没有直接访问手势识别器的人…当返回到一个页面时，我必须填充之前通过点击填充的气泡。我一直在跟踪那些泡泡标签……
func fillBubs(bubs: [Int]) {
for bub in bubs {
let bubble = view.viewWithTag(bub)
if bubble == nil {continue}
for g in bubble!.gestureRecognizers! {
let tap = g as! UITapGestureRecognizer
handleBub(tap)
}
}
}
@objc func handleBub(_ sender: UITapGestureRecognizer? = nil) {
let bubble = sender?.view!
bubble?.layer.backgroundColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1)
}
试试下面的swift代码(在Xcode 6.3.1中测试):
import UIKit
class KEUITapGesture150427 : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTap = UITapGestureRecognizer(target: self
, action: Selector("_myHandleTap:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
func _myHandleTap(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
注意，你的目标可以是UIResponder的任何子类，参见(在Xcode 6.3.1中测试):
import UIKit
class MyTapTarget : UIResponder {
func _myHandleTap2(sender: UITapGestureRecognizer) {
if sender.state == .Ended {
println("_myHandleTap2(sender.state == .Ended)")
sender.view!.backgroundColor
= UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
}
}
}
class KEUITapGesture150427b : UIViewController {
var _myTap: UITapGestureRecognizer?
var _myView: UIView?
var _myTapTarget: MyTapTarget?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor();
_myTapTarget = MyTapTarget()
_myTap = UITapGestureRecognizer(target: _myTapTarget!
, action: Selector("_myHandleTap2:"))
_myTap!.numberOfTapsRequired = 1
_myView = UIView(frame: CGRectMake(100, 200, 100, 100))
_myView!.backgroundColor=UIColor.blueColor()
_myView!.layer.cornerRadius = 20
_myView!.layer.borderWidth = 1
_myView!.addGestureRecognizer(_myTap!)
view.addSubview(_myView!)
}
}
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
}
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")
}
