确认对话框返回false立即 [英] confirm dialog returns false immediately
问题描述
这是我的code：
index.html:
...
<script type="text/javascript" charset="utf-8" src="main.js"></script>
</head>
<body onload="init();"></body>
...
main.js:
function onBackPressed(e) {
console.log("onBackPressed()");
var answer = confirm("Do you want to exit?");
console.log(answer);
if (answer) {
navigator.app.exitApp();
}
}
function init() {
...
document.addEventListener("backbutton", onBackPressed, false);
...
}
当我退出应用程序第一次，一切似乎是确定。
问题是，当我下一次启动应用程序时，确认对话框虚假立即对话框保持可见返回。所以，当我点击OK什么都不会发生。
When I exit application first time, everything seems to be ok. The problem is when I start application next time, confirmation dialog returns false immediately and dialog stay visible. So when I click "OK" nothing will happen.
下面是logcat的输出：
Here is output from logcat:
04-11 16:16:26.444: D/PhoneGapLog(18356): onBackPressed()
04-11 16:16:26.444: D/PhoneGapLog(18356): file:///android_asset/www/main.js: Line 49 : onBackPressed()
04-11 16:16:26.444: I/Web Console(18356): onBackPressed() at file:///android_asset/www/main.js:49
04-11 16:16:26.584: D/PhoneGapLog(18356): false
04-11 16:16:26.584: D/PhoneGapLog(18356): file:///android_asset/www/main.js: Line 51 : false
04-11 16:16:26.584: I/Web Console(18356): false at file:///android_asset/www/main.js:51
这是在PhoneGap的还是Android的错误？或者说我做错了什么？
Is this a bug in phonegap or android? Or I'm doing something wrong?
我使用的Nexus One采用Android 2.3.6和1.4.1的PhoneGap（1.5版本有后退按钮事件的问题）。
I use Nexus One with android 2.3.6 and phonegap 1.4.1 (version 1.5 have issue with backbutton event).
推荐答案
在PhoneGap的，确认是做一个异步回调。请参阅<一个href=\"http://docs.phonegap.com/en/1.5.0/phonegap_notification_notification.md.html#notification.confirm\"相对=nofollow> API文档。
In PhoneGap, confirm is does an asynchronous callback. See the api docs.
变量的答案的永远是因为立即返回假的。
The variable answer will always be false because of the immediate return.
在code应该看起来更像是：
The code should look more like:
// process the confirmation dialog result
function onConfirm(button) {
alert('You selected button ' + button);
}
// Show a custom confirmation dialog
//
function showConfirm() {
navigator.notification.confirm(
'You are the winner!', // message
onConfirm, // callback to invoke with index of button pressed
'Game Over', // title
'Restart,Exit' // buttonLabels
);
}
这篇关于确认对话框返回false立即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IT屋！
