jQuery 计时器（jquery timers）简单应用

绝地灬酷狼 2023-10-17 20:16 29阅读 0赞

jquery timers 代码（版本1.2）：

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 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][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】

[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif
[http_plugins.jquery.com_project_timers]: http://plugins.jquery.com/project/timers