问题描述
我有一个 DotBoss:UIViewController
现场有十几个UIView,点:UIView
(有些是直接的子视图,有些是进一步的。)
在最高控制器和Dot项目之间的链中,甚至还有容器视图。
十几个点项目知道他们是否被点击...
class Dot:UIView
{
private var tap:UITapGestureRecognizer? = nil
覆盖func awakeFromNib()
{
tap = UITapGestureRecognizer(target:self,
action:#selector(SnapDot.handleTap(_ :)))
self.addGestureRecognizer(tap!)
}
func handleTap(g:UITapGestureRecognizer)
{
打印(用户点击此特定点...)
}
我想要 DotBoss
知道何时点击 Dot
之一。
class DotBoss:UIViewController
{
func oneDotWasClicked(d:Dot)
{
}
}
如何在Swift中完美完成?
func handleTap(g:UITapGestureRecognizer){
// ...如果需要,其他东西可以去这里...
var r:UIResponder = self
repeat {r = r .nextResponder()! } while!(r是DotBoss)
(r as!DotBoss).oneDotWasClicked(self)
}
I have a DotBoss:UIViewController
There are a dozen UIView in the scene, Dot:UIView
(Some are direct subviews, some are further down.)
There are even container views in the chain between the highest controller and the Dot items.
The dozen Dot items know if they are tapped...
class Dot:UIView
{
private var tap:UITapGestureRecognizer? = nil
override func awakeFromNib()
{
tap = UITapGestureRecognizer(target:self,
action: #selector(SnapDot.handleTap(_:)))
self.addGestureRecognizer(tap!)
}
func handleTap(g:UITapGestureRecognizer)
{
print("user tapped on this particular Dot...")
}
}
I want DotBoss
to know when one of the Dot
is tapped.
class DotBoss:UIViewController
{
func oneDotWasClicked(d:Dot)
{
}
}
How to do this perfectly in Swift?
Note for anyone googling here, this bubbling extension is remarkably useful: https://blog.veloxdb.com/2016/05/12/bubbling-events-using-uiresponder-in-swift/
A Dot (UIView) and its ultimately controlling DotBoss (UIViewController) are both responders, and are links along the responder chain. Therefore, a Dot can call a method in its DotBoss by walking the responder chain until it comes to the DotBoss:
func handleTap(g:UITapGestureRecognizer) {
// ... other stuff can go here if necessary ...
var r : UIResponder = self
repeat { r = r.nextResponder()! } while !(r is DotBoss)
(r as! DotBoss).oneDotWasClicked(self)
}
这篇关于Swift,对于一些UIViews到他们的整体控制器点击的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!