我做了一个小游戏触摸屏幕向上移动，释放下去。但是，玩家可能会因屏幕边界冲突而死亡。碰撞时，一项新活动开始。 “不幸的是应用程序停止了”，当我在碰撞后继续按下时出现。使用import UIKit
class OptionsViewAnimator: NSObject, UIViewControllerAnimatedTransitioning
{
var type : UINavigationControllerOperation
let duration = 0.35
init(operator type:UINavigationControllerOperation)
{
self.type = type
}
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval
{
return self.duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning)
{
switch type
{
case .push: showOptions(using: transitionContext)
case .pop: hideOptions(using: transitionContext)
default: break
}
}
func showOptions(using context: UIViewControllerContextTransitioning)
{
let src = context.viewController(forKey: .from)!
let srcView = context.view(forKey: .from)!
let dstView = context.view(forKey: .to)!
let nav = src.navigationController
let toolbar = nav?.toolbar
let screen = UIScreen.main.bounds
let origin = srcView.frame.origin
var dstSize = srcView.frame.size
dstSize.height = screen.height - origin.y
dstView.frame = CGRect(origin: origin, size: dstSize)
dstView.layer.position = origin
dstView.layer.anchorPoint = CGPoint(x:0.0,y:0.0)
dstView.transform = dstView.transform.scaledBy(x: 1.0, y: 0.01)
let container = context.containerView
container.addSubview(dstView)
srcView.window?.backgroundColor = toolbar?.barTintColor
nav?.setToolbarHidden(true, animated: false)
UIView.animate(withDuration: self.duration, animations:
{
dstView.transform = .identity
toolbar?.alpha = 0.0
} )
{
(finished)->Void in
context.completeTransition( !context.transitionWasCancelled )
}
}
func hideOptions(using context: UIViewControllerContextTransitioning)
{
let src = context.viewController(forKey: .from)!
let srcView = context.view(forKey: .from)!
let dstView = context.view(forKey: .to)!
let screen = UIScreen.main.bounds
let origin = srcView.frame.origin
var dstSize = srcView.frame.size
let nav = src.navigationController
let toolbar = nav?.toolbar
let barHeight = toolbar?.frame.height ?? 0.0
srcView.layer.anchorPoint = CGPoint(x:0.0,y:0.0)
dstSize.height = screen.height - (origin.y + barHeight)
dstView.frame = CGRect(origin:origin, size:dstSize)
let container = context.containerView
container.addSubview(dstView)
container.addSubview(srcView)
nav?.setToolbarHidden(false, animated: false)
toolbar?.alpha = 0.0
UIView.animate(withDuration: 0.35, animations:
{
srcView.transform = srcView.transform.scaledBy(x: 1.0, y: 0.01)
toolbar?.alpha = 1.0
} )
{
(finished)->Void in
context.completeTransition( !context.transitionWasCancelled )
}
}
}
。
我该怎么办？
我正在使用Eclipse，并感谢每个答案
答案 0 :(得分：0)
查看为响应onTouch事件而执行的代码。如果活动被销毁或已被销毁，它可以执行，例如你使用后台线程或AsyncTask？您需要尊重活动生命周期，否则您可能正在尝试访问不再处于活动状态的活动。