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Floating View 扩展：悬浮视图扩展，将组件转换为悬浮窗口 · App Inventor 2 中文网
...：通过 LayoutParams 设置窗口属性
权限系统：需要 SYSTEM_ALERT_WINDOW 权限
边距设置
重叠视图的边距列表格式：
索引 0：左边距
索引 1：上边距
索引 2：右边距
索引 3：下边距
动画效果
...
How can I create and style a div using JavaScript?
...lement("Button");
var textForButton = document.createTextNode("Release the alert");
button.appendChild(textForButton);
button.addEventListener("click", function(){
alert("Hi!");
});
divElement.appendChild(button);
// Appending the div element to body
document.getElementsByTagName("body")[0].app...
Getting the ID of the element that fired an event
...
$(document).ready(function() {
$("a").click(function(event) {
alert(event.target.id);
});
});
Note also that this will also work, but that it is not a jQuery object, so if you wish to use a jQuery function on it then you must refer to it as $(this), e.g.:
$(document).ready(functi...
How do I access properties of a javascript object if I don't know the names?
...
btw alert is a bad way to debug things, try console.log
– StackOverflowed
Oct 21 '12 at 13:32
...
How to write an inline IF statement in JavaScript?
...t( $( '#ABLAHALAHOO' ).text()) > parseInt( $( '#WABOOLAWADO ).text()) ? alert( 'Eat potato' ) : alert( 'You starve' );
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AngularJS access scope from outside js function
...angularjs like a jquery/javascript event handler.
function change() {
alert("a");
var scope = angular.element($("#outer")).scope();
scope.$apply(function(){
scope.msg = 'Superhero';
})
}
Demo: Fiddle
...
Making the iPhone vibrate
...nctions that take a parameter kSystemSoundID_Vibrate:
1) AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);
2) AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
Both of the functions vibrate the iPhone. But, when you use the first
function on devices that don’t support vibration, it ...
OpenSSL: PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE [close
...or SSL_accept: 14094418: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket when I try ro make connection
– lsv
Dec 30 '13 at 11:54
...
How to check if element has any children in Javascript?
...childElementCount property:
if ( element.childElementCount !== 0 ){
alert('i have children');
} else {
alert('no kids here');
}
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Check if image exists on server using JavaScript?
...nerror = bad;
img.src = imageSrc;
}
checkImage("foo.gif", function(){ alert("good"); }, function(){ alert("bad"); } );
JSFiddle
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