jQuery 计时器(jquery timers)简单应用

jquery timers 代码(版本1.2):

jquery timers
 
     
/* *
* jQuery.timers - Timer abstractions for jQuery
* Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
* Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
* Date: 2009/10/16
*
* @author Blair Mitchelmore
* @version 1.2
*
*
*/

jQuery.fn.extend({
everyTime:
function (interval, label, fn, times) {
return this .each( function () {
jQuery.timer.add(
this , interval, label, fn, times);
});
},
oneTime:
function (interval, label, fn) {
return this .each( function () {
jQuery.timer.add(
this , interval, label, fn, 1 );
});
},
stopTime:
function (label, fn) {
return this .each( function () {
jQuery.timer.remove(
this , label, fn);
});
}
});

jQuery.extend({
timer: {
global: [],
guid:
1 ,
dataKey:
" jQuery.timer " ,
regex:
/ ^([0-9]+(?:\.[0-9]*)?)\s*(.*s)?$ / ,
powers: {
// Yeah this is major overkill...
' ms ' : 1 ,
' cs ' : 10 ,
' ds ' : 100 ,
' s ' : 1000 ,
' das ' : 10000 ,
' hs ' : 100000 ,
' ks ' : 1000000
},
timeParse:
function (value) {
if (value == undefined || value == null )
return null ;
var result = this .regex.exec(jQuery.trim(value.toString()));
if (result[ 2 ]) {
var num = parseFloat(result[ 1 ]);
var mult = this .powers[result[ 2 ]] || 1 ;
return num * mult;
}
else {
return value;
}
},
add:
function (element, interval, label, fn, times) {
var counter = 0 ;

if (jQuery.isFunction(label)) {
if ( ! times)
times
= fn;
fn
= label;
label
= interval;
}

interval
= jQuery.timer.timeParse(interval);

if ( typeof interval != ' number ' || isNaN(interval) || interval < 0 )
return ;

if ( typeof times != ' number ' || isNaN(times) || times < 0 )
times
= 0 ;

times
= times || 0 ;

var timers = jQuery.data(element, this .dataKey) || jQuery.data(element, this .dataKey, {});

if ( ! timers[label])
timers[label]
= {};

fn.timerID
= fn.timerID || this .guid ++ ;

var handler = function () {
if (( ++ counter > times && times !== 0 ) || fn.call(element, counter) === false )
jQuery.timer.remove(element, label, fn);
};

handler.timerID
= fn.timerID;

if ( ! timers[label][fn.timerID])
timers[label][fn.timerID]
= window.setInterval(handler,interval);

this .global.push( element );

},
remove:
function (element, label, fn) {
var timers = jQuery.data(element, this .dataKey), ret;

if ( timers ) {

if ( ! label) {
for ( label in timers )
this .remove(element, label, fn);
}
else if ( timers[label] ) {
if ( fn ) {
if ( fn.timerID ) {
window.clearInterval(timers[label][fn.timerID]);
delete timers[label][fn.timerID];
}
}
else {
for ( var fn in timers[label] ) {
window.clearInterval(timers[label][fn]);
delete timers[label][fn];
}
}

for ( ret in timers[label] ) break ;
if ( ! ret ) {
ret
= null ;
delete timers[label];
}
}

for ( ret in timers ) break ;
if ( ! ret )
jQuery.removeData(element,
this .dataKey);
}
}
}
});

jQuery(window).bind(
" unload " , function () {
jQuery.each(jQuery.timer.global,
function (index, item) {
jQuery.timer.remove(item);
});
});

jQuery Timers插件地址:

http://plugins.jquery.com/project/timers

下面来自JavaEye论坛的JQuery Timers应用知识

提供了三个函式
1. everyTime(时间间隔, [计时器名称], 函式名称, [次数限制], [等待函式程序完成])
2. oneTime(时间间隔, [计时器名称], 呼叫的函式)
3. stopTime ([计时器名称], [函式名称])

/*************************************************************
 *   everyTime(时间间隔, [计时器名称], 函式名称, [次数限制], [等待函式程序完成])
 *************************************************************/

//每1秒执行函式test()
function test(){
   //do something...
}
$('body').everyTime('1s',test);
 
//每1秒执行
$('body').everyTime('1s',function(){
 //do something...
});
 
//每1秒执行,并命名计时器名称为A
$('body').everyTime('1s','A',function(){
 //do something...
});
 
//每20秒执行,最多5次,并命名计时器名称为B
$('body').everyTime('2das','B',function(){
 //do something...
},5);
 
//每20秒执行,无限次,并命名计时器名称为C
//若时间间隔抵到,但函式程序仍未完成则需等待执行函式完成后再继续计时
$('body').everyTime('2das','C',function(){
    //执行一个会超过20秒以上的程式
},0,true);
 
/***********************************************************
 *   oneTime(时间间隔, [计时器名称], 呼叫的函式)
 ***********************************************************/
//倒数10秒后执行
$('body').oneTime('1das',function(){
 //do something...
});
 
//倒数100秒后执行,并命名计时器名称为D
$('body').oneTime('1hs','D',function(){
 //do something...
});
 
/************************************************************
 *  stopTime ([计时器名称], [函式名称])
 ************************************************************/
//停止所有的在$('body')上计时器
$('body').stopTime ();
 
//停止$('body')上名称为A的计时器
$('body').stopTime ('A');
 
//停止$('body')上所有呼叫test()的计时器
$('body').stopTime (test);

自定义时间单位
打开源代码
找到
powers: {
   // Yeah this is major overkill...
   'ms': 1,
   'cs': 10,
   'ds': 100,
   's': 1000,
   'das': 10000,
   'hs': 100000,
   'ks': 1000000
  }
可以定制自己想要的了!

【出自:http://www.xueit.com/html/2009-12-25/33-440792138906.html】

转载于:https://www.cnblogs.com/vipstone/archive/2010/10/27/1862485.html

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