问题描述
可以使用哪些代码来检测用户何时与应用互动以及用户何时未与应用互动?
目前我有一个 ViewController
带有 UIView
,它通过覆盖触摸接收触摸,也可以通过接收平移手势和点击手势来接收触摸。这个问题的解决方案需要与那些当前的手势分开或者高于这些手势。
是否有一个手势识别器位于可以告诉我的应用程序的所有其他内容之上它收到手势并且没有收到手势?
当应用程序处于活动状态时,是否有办法监控应用是否正在接收触摸及何时接收不是,并根据需要调用函数,例如:
func appActive(){
打印(应用程序从触摸,点击,滑动,长按等接收输入)
}
func appInactive(){
print(应用已停止接收任何输入。)
}
谢谢。
1 - Locate your project's Swift file AppDelegate.swift
, and comment out @UIApplicationMain
:
//@UIApplicationMain
2 - Add a new Swift file to your project named exactly main.swift
, and add the code:
import UIKit
UIApplicationMain(
CommandLine.argc, UnsafeMutableRawPointer(CommandLine.unsafeArgv)
.bindMemory( to: UnsafeMutablePointer<Int8>.self,
capacity: Int(CommandLine.argc)), nil, NSStringFromClass(AppDelegate.self))
3 - Add a new Swift file to your project named exactly UIApplication.swift
, and add the code:
import UIKit
@objc(MyApplication)
class MyApplication: UIApplication {
override func sendEvent(event: UIEvent) {
// Ignore .Motion and .RemoteControl event simply everything else then .Touches
if event.type != .Touches {
super.sendEvent(event)
return
}
// .Touches only
var restartTimer = true
if let touches = event.allTouches() {
// At least one touch in progress? Do not restart timer, just invalidate it
for touch in touches.enumerate() {
if touch.element.phase != .Cancelled && touch.element.phase != .Ended {
restartTimer = false
break
}
}
}
if restartTimer {
// Touches ended || cancelled, restart timer
print("Touches ended. Restart timer")
} else {
// Touches in progress - !ended, !cancelled, just invalidate it
print("Touches in progress. Invalidate timer")
}
super.sendEvent(event)
}
}
4 - Locate your project's Info.plist
file, and add a new key (Xcode menu: Editor > Add Item
), select or type key Principal class
, with string value MyApplication
.
5 - Run your project!
这篇关于通过Swift中的触摸检测应用程序何时处于活动状态或非活动状态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!