我有一个奇怪的问题。我在 subview 中添加了一个基本的点击手势识别器,但它仅在需要时才起作用。有时,它会在第二次单击时起作用,有时在第三次甚至更多次单击时起作用。但是,当我将 print("whatever")
添加到由手势识别器调用的函数时,它总是在我第一次单击 subview 时起作用。
如何解决这个问题?
这两个例子出现了同样的问题:
subview :
let getGiftGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.getGift))
self.continueButton.addGestureRecognizer(getGiftGestureRecognizer)
DispatchQueue.main.async {
self.coverAnyUIElement(element: self.successView)
let gift = SCNNode()
gift.geometry = SCNBox(width: 1, height: 1, length: 1, chamferRadius: 0)
//nahodne vygenerovat geometry, nebo barvu
let ownedGeometries = UserDefaults.standard.array(forKey: "ownedGeometries")
let ownedColors = UserDefaults.standard.array(forKey: "ownedColors")
let notOwnedGeometriesCount = geometriesCount - ownedGeometries!.count
let notOwnedColorsCount = colorsCount - ownedColors!.count
if notOwnedGeometriesCount == 0{
//mam vsechny geometrie
//vygeneruju barvu
}else if notOwnedColorsCount == 0{
//mam vsechny barvy
//vygeneruju geometrii
}else if(notOwnedGeometriesCount == 0 && notOwnedColorsCount == 0){
//mam uplne vsechno
}else{
//vygeneruj cokoliv
let random = Int.random(in: 0...10)
if random <= 3{
//vygeneruj geometrii
}else{
//vygeneruj barvu
}
}
print(self.generateColor())
print(self.generateGeometry())
self.chest.opacity = 1
self.chest.position.y = -1.8
self.world.addChildNode(self.chest)
let viko = self.chest.childNode(withName: "viko", recursively: false)
self.chest.addChildNode(gift)
print("VLAKNO1: \(Thread.isMainThread)")
viko?.runAction(SCNAction.rotateBy(x: 0, y: 0, z: -90/(180/CGFloat.pi), duration: 1),completionHandler: {
print("VLAKNO2: \(Thread.isMainThread)")
let pohyb = SCNAction.move(by: SCNVector3(0,4,0), duration: 1)
gift.runAction(pohyb,completionHandler: {
print("VLAKNO3: \(Thread.isMainThread)")
self.showConfirmGiftButton()
})
})
}
}
按钮:
confirmGiftButton.addTarget(self, action: #selector(acceptedGift), for: .touchUpInside)
@objc func acceptedGift(){
DispatchQueue.main.async {
UIButton.animate(withDuration: 0.2, animations: {
self.confirmGiftButton.alpha = 0.9
}) { (_) in
UIButton.animate(withDuration: 0.2, animations: {
self.confirmGiftButton.alpha = 1
}) { (_) in
//print("VLAKNO1: \(Thread.isMainThread)")
self.chest.runAction(SCNAction.fadeOut(duration: 0.5),completionHandler: {
// print("Vlakno: \(Thread.isMainThread)")
self.chest.removeFromParentNode()
self.moveToMenu()
})
//print("VLAKNO2: \(Thread.isMainThread)")
self.coverAnyUIElement(element: self.confirmGiftButton)
}
}
}
}
最佳答案
所以我从这两种方法中删除了 DispatchQueue.main.async
并尝试了几次,看起来这就是问题所在,因为现在 subview 手势识别器和按钮目标都可以工作首先点击正确。
我认为这是因为当我单击按钮时,主线程已经被使用,所以它以某种方式跳过了这些方法。并且在第二次或更多次点击时起作用,因为那时它已经是空的。
关于ios - Swift:为什么点击手势识别器不是每次都能工作?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59650910/