Javascript 在windows 8应用程序中创建扩展启动屏幕
我正在使用javascript使用windows 8应用程序 我参考了MSDN教程,了解如何使用javaScript创建扩展的初始屏幕。扩展的启动屏幕工作良好。但问题是我无法删除它并启动应用程序。谢谢你的帮助 这是我的defaulf.js文件Javascript 在windows 8应用程序中创建扩展启动屏幕,javascript,html,winjs,msdn,Javascript,Html,Winjs,Msdn,我正在使用javascript使用windows 8应用程序 我参考了MSDN教程,了解如何使用javaScript创建扩展的初始屏幕。扩展的启动屏幕工作良好。但问题是我无法删除它并启动应用程序。谢谢你的帮助 这是我的defaulf.js文件 (function () { "use strict"; WinJS.Binding.optimizeBindingReferences = true; var app = WinJS.Application; var activatio
(function () {
"use strict";
WinJS.Binding.optimizeBindingReferences = true;
var app = WinJS.Application;
var activation = Windows.ApplicationModel.Activation;
var nav = WinJS.Navigation;
var splash = null; // Variable to hold the splash screen object.
var dismissed = false; // Variable to track splash screen dismissal status.
var coordinates = { x: 0, y: 0, width: 0, height: 0 };
WinJS.Application.onerror = function (e) {
console.error(e.detail.exception.message, e.detail.exception.stack);
var dialog = new Windows.UI.Popups.MessageDialog(
e.detail.exception.stack, e.detail.exception.message);
dialog.showAsync().done();
return true;
};
WinJS.Application.onsettings = function (e) {
e.detail.applicationcommands = {
"about": { title: "About", href: "/pages/settings/about.html"},
"privacy": { title: "Privacy Policy", href: "/pages/settings/privacy.html"}
};
WinJS.UI.SettingsFlyout.populateSettings(e);
};
app.addEventListener("activated", function (args) {
WinJS.Namespace.define("GlobalNav", nav);
if (args.detail.kind === activation.ActivationKind.launch) {
if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) {
// Retrieve splash screen object
splash = args.detail.splashScreen;
// Retrieve the window coordinates of the splash screen image.
SdkSample.coordinates = splash.imageLocation;
// Register an event handler to be executed when the splash screen has been dismissed.
splash.addEventListener("dismissed", onSplashScreenDismissed, false);
// Create and display the extended splash screen using the splash screen object.
ExtendedSplash.show(splash);
// Listen for window resize events to reposition the extended splash screen image accordingly.
// This is important to ensure that the extended splash screen is formatted properly in response to snapping, unsnapping, rotation, etc...
window.addEventListener("resize", onResize, false);
} else {
// TODO: This application has been reactivated from suspension.
// Restore application state here.
}
if (app.sessionState.history) {
nav.history = app.sessionState.history;
}
args.setPromise(WinJS.UI.processAll().then(function () {
document.body.classList.add("loaded");
if (nav.location) {
nav.history.current.initialPlaceholder = true;
return nav.navigate(nav.location, nav.state);
} else {
return nav.navigate(Application.navigator.home);
}
}));
}
});
function onSplashScreenDismissed() {
// Include code to be executed when the system has transitioned from the splash screen to the extended splash screen (application's first view).
SdkSample.dismissed = true;
// Tear down the app's extended splash screen after completing setup operations here...
// In this sample, the extended splash screen is torn down when the "Learn More" button is clicked.
document.getElementById("learnMore").addEventListener("click", ExtendedSplash.remove, false);
// The following operation is only applicable to this sample to ensure that UI has been updated appropriately.
// Update scenario 1's output if scenario1.html has already been loaded before this callback executes.
if (document.getElementById("dismissalOutput")) {
document.getElementById("dismissalOutput").innerText = "Received the splash screen dismissal event.";
}
}
function onResize() {
// Safely update the extended splash screen image coordinates. This function will be fired in response to snapping, unsnapping, rotation, etc...
if (splash) {
// Update the coordinates of the splash screen image.
SdkSample.coordinates = splash.imageLocation;
ExtendedSplash.updateImageLocation(splash);
}
}
WinJS.Namespace.define("SdkSample", {
dismissed: dismissed,
coordinates: coordinates
});
app.oncheckpoint = function (args) {
// TODO: This application is about to be suspended. Save any state
// that needs to persist across suspensions here. If you need to
// complete an asynchronous operation before your application is
// suspended, call args.setPromise().
app.sessionState.history = nav.history;
};
if (Internet.isConnected()) {app.start();}
else {
var internetError = Windows.UI.Popups.MessageDialog("Internet connection is not working properly", "Daily Mirror : internet Connection Error");
internetError.showAsync().done();
}
})();
这是扩展的splash.js文件
(function () {
"use strict";
// Displays the extended splash screen. Pass the splash screen object retrieved during activation.
function show(splash) {
var extendedSplashImage = document.getElementById("extendedSplashImage");
// Position the extended splash screen image in the same location as the system splash screen image.
extendedSplashImage.style.top = splash.imageLocation.y + "px";
extendedSplashImage.style.left = splash.imageLocation.x + "px";
extendedSplashImage.style.height = splash.imageLocation.height + "px";
extendedSplashImage.style.width = splash.imageLocation.width + "px";
// Position the extended splash screen's progress ring. Note: In this sample, the progress ring is not used.
var extendedSplashProgress = document.getElementById("extendedSplashProgress");
extendedSplashProgress.style.marginTop = splash.imageLocation.y + splash.imageLocation.height + 32 + "px";
// Once the extended splash screen is setup, apply the CSS style that will make the extended splash screen visible.
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
WinJS.Utilities.removeClass(extendedSplashScreen, "hidden");
}
// Updates the location of the extended splash screen image. Should be used to respond to window size changes.
function updateImageLocation(splash) {
if (isVisible()) {
var extendedSplashImage = document.getElementById("extendedSplashImage");
// Position the extended splash screen image in the same location as the system splash screen image.
extendedSplashImage.style.top = splash.imageLocation.y + "px";
extendedSplashImage.style.left = splash.imageLocation.x + "px";
extendedSplashImage.style.height = splash.imageLocation.height + "px";
extendedSplashImage.style.width = splash.imageLocation.width + "px";
// Position the extended splash screen's progress ring. Note: In this sample, the progress ring is not used.
/*
var extendedSplashProgress = document.getElementById("extendedSplashProgress");
extendedSplashProgress.style.marginTop = splash.imageLocation.y + splash.imageLocation.height + 32 + "px";
*/
}
}
// Checks whether the extended splash screen is visible and returns a boolean.
function isVisible() {
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
return !(WinJS.Utilities.hasClass(extendedSplashScreen, "hidden"));
}
// Removes the extended splash screen if it is currently visible.
function remove() {
if (isVisible()) {
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
WinJS.Utilities.addClass(extendedSplashScreen, "hidden");
}
}
WinJS.Namespace.define("ExtendedSplash", {
show: show,
updateImageLocation: updateImageLocation,
isVisible: isVisible,
remove: remove
});
})();
<div id="extendedSplashScreen" class="extendedSplashScreen hidden">
<img id="extendedSplashImage" src="/images/splash-sdk.png" alt="Splash screen image" />
<!-- Optionally, add a progress ring. Note: In this sample, the progress ring is not used. -->
<!--
<progress id="extendedSplashProgress" style="color: white;" class="win-medium win-ring"></progress>
-->
<div id="extendedSplashDescription">
<span id="extendedSplashText">The splash screen was dismissed and the image above was positioned using the splash screen API.</span>
<br /><br />
<button class="action" id="learnMore">Learn More</button>
</div>
</div>
最后是splash.html文件
(function () {
"use strict";
// Displays the extended splash screen. Pass the splash screen object retrieved during activation.
function show(splash) {
var extendedSplashImage = document.getElementById("extendedSplashImage");
// Position the extended splash screen image in the same location as the system splash screen image.
extendedSplashImage.style.top = splash.imageLocation.y + "px";
extendedSplashImage.style.left = splash.imageLocation.x + "px";
extendedSplashImage.style.height = splash.imageLocation.height + "px";
extendedSplashImage.style.width = splash.imageLocation.width + "px";
// Position the extended splash screen's progress ring. Note: In this sample, the progress ring is not used.
var extendedSplashProgress = document.getElementById("extendedSplashProgress");
extendedSplashProgress.style.marginTop = splash.imageLocation.y + splash.imageLocation.height + 32 + "px";
// Once the extended splash screen is setup, apply the CSS style that will make the extended splash screen visible.
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
WinJS.Utilities.removeClass(extendedSplashScreen, "hidden");
}
// Updates the location of the extended splash screen image. Should be used to respond to window size changes.
function updateImageLocation(splash) {
if (isVisible()) {
var extendedSplashImage = document.getElementById("extendedSplashImage");
// Position the extended splash screen image in the same location as the system splash screen image.
extendedSplashImage.style.top = splash.imageLocation.y + "px";
extendedSplashImage.style.left = splash.imageLocation.x + "px";
extendedSplashImage.style.height = splash.imageLocation.height + "px";
extendedSplashImage.style.width = splash.imageLocation.width + "px";
// Position the extended splash screen's progress ring. Note: In this sample, the progress ring is not used.
/*
var extendedSplashProgress = document.getElementById("extendedSplashProgress");
extendedSplashProgress.style.marginTop = splash.imageLocation.y + splash.imageLocation.height + 32 + "px";
*/
}
}
// Checks whether the extended splash screen is visible and returns a boolean.
function isVisible() {
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
return !(WinJS.Utilities.hasClass(extendedSplashScreen, "hidden"));
}
// Removes the extended splash screen if it is currently visible.
function remove() {
if (isVisible()) {
var extendedSplashScreen = document.getElementById("extendedSplashScreen");
WinJS.Utilities.addClass(extendedSplashScreen, "hidden");
}
}
WinJS.Namespace.define("ExtendedSplash", {
show: show,
updateImageLocation: updateImageLocation,
isVisible: isVisible,
remove: remove
});
})();
<div id="extendedSplashScreen" class="extendedSplashScreen hidden">
<img id="extendedSplashImage" src="/images/splash-sdk.png" alt="Splash screen image" />
<!-- Optionally, add a progress ring. Note: In this sample, the progress ring is not used. -->
<!--
<progress id="extendedSplashProgress" style="color: white;" class="win-medium win-ring"></progress>
-->
<div id="extendedSplashDescription">
<span id="extendedSplashText">The splash screen was dismissed and the image above was positioned using the splash screen API.</span>
<br /><br />
<button class="action" id="learnMore">Learn More</button>
</div>
</div>
启动屏幕被关闭,上面的图像使用启动屏幕API定位。
了解更多
请帮我举个例子或指导我。。。非常感谢你。当我将起始页更改为splash.html时,这工作正常,但应用程序与default.html配合工作正常如果我理解正确,您不确定如何使扩展的启动屏幕(splash.html)消失并显示default.html中的内容,对吗 关键是如何取消扩展的初始屏幕以及如何显示应用程序主页——MSDN教程并不擅长指出这是如何工作的 这里有两种实现方法 一种是将扩展初始屏幕和应用程序主页的内容作为default.html中的同级元素,如下所示:
<body>
<div id="mainContent">
<h1>This is the real start page</h1>
<p>Other content goes here.</p>
</div>
<!-- This div (declared last) will overlay the rest of the page initially; the elements within it will be
repositioned according to the default splash screen layout, then animated or shown. -->
<div id="splashScreen">
<p><span id="counter"></span></p>
<img id="logo" src="/images/splashscreen.png" />
<img id="title" src="/images/splashscreentitle.png" />
<progress id="progress" class="win-ring win-large"></progress>
</div>
</body>
这是真正的开始页
其他内容在这里
因为第二个div覆盖了第一个div,所以在扩展的初始屏幕上可以看到这些内容。当需要删除启动屏幕时,您可以隐藏该元素(正如您正在做的),或者将其完全从DOM中删除(以释放内存)
第二种方法是使用页面控件,其中default.html托管PageControlNavigator,您导航到的第一个页面是扩展的初始屏幕页面。完成工作后,它会导航到应用程序主页。(在这种情况下,请事先将WinJS.Navigation.history.current.initialPlaceholder设置为true。如果您不想在历史记录中显示初始屏幕,请参阅我的博客。)
在您的代码中,我看到您已经在使用navigator,但我认为它没有达到您想要的效果
归根结底,您必须以某种方式从splash.html导航到default.html,我看不出您在代码中做了什么类似的事情。这就是为什么将ext.splash screen作为default.html的一部分是很有意义的,我发现这是一种比尝试为此导航页面控件更简单的方法。在我的第二版书(第3章)的预览版中,我有一个ExtendedSplashScreen示例(但将在即将到来的第二次预览版的附录中),可以做到这一点。只有default.html,它包含两个div,如Kraig在下面提到的。您试图将splash.html和default.html分开有什么原因吗?示例不共享此方案的代码。@Sushil我在default.html文件中包含的我的应用程序栏事件。正如Kraig所说,我做到了,它在一个问题上运行良好。。也就是说,当我右键单击扩展启动屏幕时,应用程序栏显示在扩展启动屏幕上。非常感谢您的帮助。这才是我真正想做的。再次感谢你,克雷格。我采用了第一种方法。谢谢你用非常简单的方式来解释。但下一件事是我的应用程序栏在default.html中工作,正如您在示例中看到的。当我右键单击扩展启动屏幕时,应用程序栏将显示在扩展启动屏幕的顶部。如何克服此问题?。在扩展启动屏幕打开时将应用程序栏的disabled属性设置为true(或在default.html中设置),然后在主页出现时将其设置为false。看,非常感谢你,克雷格。。它正在工作。真的非常感谢你的支持。我祝你将来一切顺利。我在default.html中设置它,并添加appBare.disables=true以删除扩展初始屏幕中的函数。。