我在visual studio 2012上制作应用程序。我正在从主页导航到levelOne。在按钮上单击第一级我正在做一些动画，在动画期间如果我使用Windows返回按钮返回主页，然后再次回到第一级我得到动画运行，我希望这个动画停止。 这是动画发生的第一页：
(function () {
"use strict";
WinJS.UI.Pages.define("/pages/levelOne/levelOne.html", {
// This function is called whenever a user navigates to this page. It
// populates the page elements with the app's data.
ready: function initiazlize(element, options) {
document.getElementById("play").addEventListener("click",function initial(){
roundCount++;
if (flag1 == false) {
//if flag1 is false that means its time for next storyboard
j = 0;
var r3 = Math.random();
if (r3 <= 0.333) {
$(Left).animate({ marginTop: '-=100px' }, 500);
$(Left).animate({ marginTop: '+=100px' }, 500, animateAsync);
//document.getElementById("play").disabled = false;
}
else if (r3 <= 0.666) {
$(midle).animate({ marginTop: '-=100px' }, 500);
$(midle).animate({ marginTop: '+=100px' }, 500, animateAsync);
//document.getElementById("play").disabled = false;
}
else {
$("#bowlThree").animate({ marginTop: '-=100px' }, 500);
$("#bowlThree").animate({ marginTop: '+=100px' }, 500, animateAsync);
//document.getElementById("play").disabled = false;
}
//inside animate Async(), some more animation on capOne,capTwo,capThree and on object, I want to stop animation on these
//There is a counter j, when j reachs 100 animation is stopped
}
});
document.onbeforeunload = function () {
j = 100;
flag1 = true;
$("#capOne").stop(true, false);
$("#capTwo").stop(true, false);
$("#capThree").stop(true, false);
clearTimeout(variableTimer);
window.cancelAnimationFrame(variableTimer);
Debug;
};
},
unload: function () {
// TODO: Respond to navigations away from this page.
$("#capOne").stop();
$("#capOne").css({ "margin-top": "360px", "margin-left": "250px" })
$("#capTwo").css({ "margin-top": "360px", "margin-left": "580px" })
$("#capThree").css({ "margin-top": "360px", "margin-left": "910px" })
////return false;
$("#capOne").fadeOut(100);
WinJS.UI.disableAnimations();
flag1 = true;//if flag1=false then animation is stopped
$("#capOne").stop(true, false);
$("#capTwo").stop(true, false);
$("#capThree").stop(true, false);
clearTimeout(document.variableTimer);
window.cancelAnimationFrame(document.variableTimer);
debugger;
},
updateLayout: function (element, viewState, lastViewState) {
/// <param name="element" domElement="true" />
// TODO: Respond to changes in viewState.
}
});
})();
这是navigator.js文件
(function () {
"use strict";
var appView = Windows.UI.ViewManagement.ApplicationView;
var nav = WinJS.Navigation;
WinJS.Namespace.define("Application", {
PageControlNavigator: WinJS.Class.define(
// Define the constructor function for the PageControlNavigator.
function PageControlNavigator(element, options) {
this._element = element || document.createElement("div");
this._element.appendChild(this._createPageElement());
this.home = options.home;
this._lastViewstate = appView.value;
nav.onnavigated = this._navigated.bind(this);
window.onresize = this._resized.bind(this);
document.body.onkeyup = this._keyupHandler.bind(this);
document.body.onkeypress = this._keypressHandler.bind(this);
document.body.onmspointerup = this._mspointerupHandler.bind(this);
Application.navigator = this;
}, {
home: "",
/// <field domElement="true" />
_element: null,
_lastNavigationPromise: WinJS.Promise.as(),
_lastViewstate: 0,
// This is the currently loaded Page object.
pageControl: {
get: function () { return this.pageElement && this.pageElement.winControl; }
},
// This is the root element of the current page.
pageElement: {
get: function () { return this._element.firstElementChild; }
},
// Creates a container for a new page to be loaded into.
_createPageElement: function () {
var element = document.createElement("div");
element.style.width = "100%";
element.style.height = "100%";
return element;
},
// Retrieves a list of animation elements for the current page.
// If the page does not define a list, animate the entire page.
_getAnimationElements: function () { //IHDAr
if (this.pageControl && this.pageControl.getAnimationElements) {
return this.pageControl.getAnimationElements();
}
return this.pageElement;
},
// Navigates back whenever the backspace key is pressed and
// not captured by an input field.
_keypressHandler: function (args) {
if (args.key === "Backspace") {
nav.back();
}
},
// Navigates back or forward when alt + left or alt + right
// key combinations are pressed.
_keyupHandler: function (args) {
if ((args.key === "Left" && args.altKey) || (args.key === "BrowserBack")) {
nav.back();
} else if ((args.key === "Right" && args.altKey) || (args.key === "BrowserForward")) {
nav.forward();
}
},
// This function responds to clicks to enable navigation using
// back and forward mouse buttons.
_mspointerupHandler: function (args) {
if (args.button === 3) {
nav.back();
} else if (args.button === 4) {
nav.forward();
}
},
// Responds to navigation by adding new pages to the DOM.
_navigated: function (args) {
var newElement = this._createPageElement();
var parentedComplete;
var parented = new WinJS.Promise(function (c) { parentedComplete = c; });
this._lastNavigationPromise.cancel();
this._lastNavigationPromise = WinJS.Promise.timeout().then(function () {
return WinJS.UI.Pages.render(args.detail.location, newElement,args.detail.state, parented);
}).then(function parentElement(control) {
var oldElement = this.pageElement;
if (oldElement.winControl && oldElement.winControl.unload) {
oldElement.winControl.unload();
}
this._element.appendChild(newElement);
this._element.removeChild(oldElement);
oldElement.innerText = "";
this._updateBackButton();
parentedComplete();
var history = args.detail.state;
WinJS.UI.Animation.enterPage(this._getAnimationElements()).done(
function () {
}
);//IDHAR
}.bind(this));
args.detail.setPromise(this._lastNavigationPromise);//IDHAR BHI
},
// Responds to resize events and call the updateLayout function
// on the currently loaded page.
_resized: function (args) {
if (this.pageControl && this.pageControl.updateLayout) {
this.pageControl.updateLayout.call(this.pageControl, this.pageElement, appView.value, this._lastViewstate);
}
this._lastViewstate = appView.value;
},
// Updates the back button state. Called after navigation has
// completed.
_updateBackButton: function () {
var backButton = this.pageElement.querySelector("header[role=banner] .win-backbutton");
if (backButton) {
backButton.onclick = function () { nav.back(); };
if (nav.canGoBack) {
backButton.removeAttribute("disabled");
} else {
backButton.setAttribute("disabled", "disabled");
}
}
},
}
)
});
})();