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ScrollView 无法识别摇动手势
我有 3 个文件。
1.ContentVC - 包含在 View Controller 之间滑动的 ScrollView
2.FirstVC - 它包含摇动功能
3.SecondVC - 默认 View Controller
当我摇动设备时没有任何反应。
ContentVC.swift
class ContainerVC: UIViewController {
@IBOutlet weak var scroll: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
let left = self.storyboard?.instantiateViewController(withIdentifier: "vw") as! UINavigationController
self.addChild(left)
self.scroll.addSubview(left.view)
self.didMove(toParent: self)
let last = self.storyboard?.instantiateViewController(withIdentifier: "lastviewNav") as! UINavigationController
self.addChild(last)
self.scroll.addSubview(last.view)
self.didMove(toParent: self)
var middleframe:CGRect = last.view.frame
middleframe.origin.x = self.view.frame.width
last.view.frame = middleframe
self.scroll.contentSize = CGSize(width: (self.view.frame.width) * 2, height: (self.view.frame.height))
}
}
FirstVC.swift
override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?) {
if event?.subtype == UIEvent.EventSubtype.motionShake {
if motion == .motionShake {
print("quote is appearing by shaking the device")
} else {
print("No quote is coming")
}
}
}
最佳答案
Motion events are delivered initially to the first responder and are forwarded up the responder chain as appropriate.
https://developer.apple.com/documentation/uikit/uiresponder/1621090-motionended
因此请确保:
FirstVC
能够成为第一响应者:override var canBecomeFirstResponder: Bool {
return true
}
FirstVC
是特定时间点的第一响应者:firstVC.becomeFirstResponder()
现在您的 UIViewController
将能够接收摇动事件。
您可以阅读有关响应者链的更多信息:How do Responder Chain Works in IPhone? What are the "next responders"?
关于ios - UIScrollView 无法识别 ShakeGesture,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55283285/
ScrollView 无法识别摇动手势 我有 3 个文件。 1.ContentVC - 包含在 View Controller 之间滑动的 ScrollView 2.FirstVC - 它包含摇动功能
当我从MSDN下载ShakeGesture -library时,他们告诉我引用.DLL文件。但是,当我解压缩文件夹时,我得到的只是源代码和冗长的文档,说明了一切工作原理。现在,在哪里可以获取此.dll
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