Google首页的图标动画效果，很传神吧？自己也能完美实现，进来请看！！

言归正传。相信大家最初看到google首页出现的图标动画的时候，特别是发现原来那么传神的效果居然不是flash的时候，肯定感觉很惊奇吧？起码当初我就是这样的感觉。是不是认为要用js实现那样的动化简直有点不可思意呢？

先给大家看看实现的效果：

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老调重谈几句，我的BlueEffects效果库在这个博客其实已经发布了很久了，也许是我阐述不够详细的缘故吧，大家了解的还是不多。其实 BlueEffects真的是一个虽然轻量级，但是功能很强大的效果库。弄明白了的话，通过灵活组合或者拆分改写可以实现很多让人眼晕的强大效果。博客里面也有好几篇文章说到精灵部落，精灵部落确实有很多很不错的效果，也相信确实亲身加入体验了一把的朋友都会感觉还不错。虽然现在还没有决定要全部开源给大家，但我确实很乐意跟大家分享其中的心得体会，愿和感兴趣的朋友交流，知无不言。还有就是，前段时间精灵部落刚上线测试的时候，确实由于太匆忙没有做好工作，不少朋友直接就没办法访问。通过近段时间的改进，基本上已经可以保证大家进去体验一下了。不过问题肯定还有的，大家多多交流！之前没有了解过精灵部落的朋友，可以先看看我博客的其他文章，相信你也会有兴趣体验一下哦！

下面我就来讲讲，怎么用我的 BlueEffects效果库实现这个传神的效果！其实，整个实现过程用到的效果，只是BlueEffects其中的一个ImageShow的改写。

首先，介绍以下，整个动画，仅仅基于一张图片（这是从goole首页下载下来的原版图片哦）：

每一个图标动画都是基于让这张图片显示不同位置的图象来实现的。而位置的设置，是通过css样式背景图片的位置来设置

相信看到这个图片都能想象到每个图标动画都是由5侦构成的，我这里，是这样定义这5侦的：

var Images1=

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -220px"},//这里通过Position的设置来灵活实现每一侦动画要显示的图片的某个位置

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -220px"},

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -220px"},

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -220px"},

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -220px"},

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -220px"}

];

每侦是一个json对象，描述了使用的图片路径，背景平铺方式和背景位置等。实际动画的时候，则是按照一定的规则，比如每20ms解析显示其中一侦的信息，从而实现动画效果。下面是具体动画效果实现的代码：这个代码基本上在我原先发布的blueeffects下载中包含有详细的解释说明，这里不再重复。

var ImageShow=function(options){
2

var self=this;
4

this.MyTimeOut=null;
5

this.DeleteTimeOut=function(){
6

if(self.MyTimeOut!=null)
7

clearTimeout(self.MyTimeOut);
8

};
10

this.NowIndex=0;
12

this.ASC=true;
13

this.errState=false;
14

var Images=[];
15

var TimeSpace=0;
16

if(options.Obj!=null&&options.Images!=null){
20

var Obj=options.Obj;
21

var TempImages=options.Images;
22

if(TempImages.length>=2){
23

var imgType;
24

try {
25

for(var i=0;i<TempImages.length;i++){
26

var imageName=TempImages[i].Image;
27

imgType=imageName.toLowerCase().substring(TempImages[i].Image.length-4);
28

if(imgType==".jpg"||imgType==".gif"||imgType==".bmp"||imgType==".png"||imgType=="jpeg"){
29

Images.push(TempImages[i]);
30

}
31

}
32

}
33

catch(err){}
34

}
35

if(options.TimeSpace!=null&&IsNum(options.TimeSpace)==true) TimeSpace=options.TimeSpace;
37

else TimeSpace=10;
38

if(TimeSpace<5) TimeSpace=5;
39

}
40

this.ChangeImage=function(){
41

try{
43

if(Images[self.NowIndex]!=null)
44

{
45

if(options.BackGround==true){
47

if(Images[self.NowIndex].Image!=null) Obj.style.backgroundImage="url("+Images[self.NowIndex].Image+")";
48

if(Images[self.NowIndex].Position!=null) Obj.style.backgroundPosition=Images[self.NowIndex].Position;
49

if(Images[self.NowIndex].PositionX!=null) Obj.style.backgroundPositionX=Images[self.NowIndex].PositionX;
50

if(Images[self.NowIndex].PositionY!=null) Obj.style.backgroundPositionY=Images[self.NowIndex].PositionY;

51 if(Images[self.NowIndex].Repeat!=null&&(Images[self.NowIndex].Repeat=="repeat"||Images[self.NowIndex].Repeat=="no-repeat"||Images[self.NowIndex].Repeat=="repeat-x"||Images[self.NowIndex].Repeat=="repeat-y"))

Obj.style.backgroundRepeat=Images[self.NowIndex].Repeat;}
53

if(options.Src==true){
54

if(Images[self.NowIndex].Image!=null) Obj.src=Images[self.NowIndex].Image;
55

if(Images[self.NowIndex].Width!=null&&BlueEffects.IsNum(Images[self.NowIndex].Width)==true) Obj.style.width=Images[self.NowIndex].Width+"px";
56

if(Images[self.NowIndex].Height!=null&&BlueEffects.IsNum(Images[self.NowIndex].Height)==true) Obj.style.height=Images[self.NowIndex].Height+"px"; }
57

if(options.BackGround!=true&&options.Src!=true){
58

if(Images[self.NowIndex].Image!=null) Obj.style.backgroundImage="url("+Images[self.NowIndex].Image+")";
59

if(Images[self.NowIndex].Position!=null) Obj.style.backgroundPosition=Images[self.NowIndex].Position;
60

if(Images[self.NowIndex].PositionX!=null) Obj.style.backgroundPositionX=Images[self.NowIndex].PositionX;
61

if(Images[self.NowIndex].PositionY!=null) Obj.style.backgroundPositionY=Images[self.NowIndex].PositionY;
62

if(Images[self.NowIndex].Repeat!=null&&(Images[self.NowIndex].Repeat=="repeat"||Images[self.NowIndex].Repeat=="no-repeat"||Images[self.NowIndex].Repeat=="repeat-x"||Images[self.NowIndex].Repeat=="repeat-y"))
63

Obj.style.backgroundRepeat=Images[self.NowIndex].Repeat; }
64

}
65

}
66

catch(err)
67

{self.errState=true;}
68

self.MyTimeOut=setTimeout(self.ChangeImage,TimeSpace);
70

if(self.ASC==false)
72

{
73

self.NowIndex--;
74

if(self.NowIndex<=-1||self.errState==true) {
75

clearTimeout(self.MyTimeOut);
76

if(options.Stop!=null)try{options.Stop();}catch(err){}
77

}
78

}
79

else if(self.ASC==true)
80

{
81

self.NowIndex++;
82

if(self.NowIndex>=Images.length+1||self.errState==true){
83

clearTimeout(self.MyTimeOut);
84

if(options.Stop!=null)try{options.Stop();}catch(err){}
85

}
86

}
87

}//end this.ChangeImage
88

} //end ImageShow

下面调用这个可以通用的动画效果，实现本特定动画效果：

var Images2=
4

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px 0px"},
5

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px 0px"},
6

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px 0px"},
7

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px 0px"},
8

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px 0px"},
9

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px 2px"},
10

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px 0px"}
11

];
12

var Images3=
14

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -35px"},
15

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -35px"},
16

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -35px"},
17

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -35px"},
18

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -35px"},
19

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -35px"},
20

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -35px"}
21

];
22

var Images4=
24

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -72px"},
25

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -72px"},
26

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -72px"},
27

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -72px"},
28

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -72px"},
29

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -72px"},
30

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -72px"}
31

];
32

var Images5=
34

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -109px"},
35

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -109px"},
36

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -109px"},
37

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -109px"},
38

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -109px"},
39

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -109px"},
40

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -109px"}
41

];
42

var Images6=
44

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -145px"},
45

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -145px"},
46

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -145px"},
47

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -145px"},
48

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -145px"},
49

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -145px"},
50

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -145px"}
51

];
52

var Images7=
54

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -183px"},
55

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -183px"},
56

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -183px"},
57

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -183px"},
58

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -183px"},
59

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -183px"},
60

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -183px"}
61

];
62

var Images1=
64

[{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-5px -220px"},
65

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-55px -220px"},
66

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-105px -220px"},
67

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-155px -220px"},
68

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -220px"},
69

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -220px"},
70

{Image:"../Images/toolbar.png",Repeat:"no-repeat",Position:"-205px -220px"}
71

];
72

//前面7个数组，分别定义7个图标动画的侦信息。
74

var Show1=null;
75

var Show2=null;
76

var Show3=null;
77

var Show4=null;
78

var Show5=null;
79

var Show6=null;
80

var Show7=null;
81

function MouseOver(Num)
83

{
84

var Obj=null;
85

if(Num==1)
86

Obj=Show1;
87

else if(Num==2)
88

Obj=Show2;
89

else if(Num==3)
90

Obj=Show3;
91

else if(Num==4)
92

Obj=Show4;
93

else if(Num==5)
94

Obj=Show5;
95

else if(Num==6)
96

Obj=Show6;
97

else if(Num==7)
98

Obj=Show7;
99

100

Obj.DeleteTimeOut();//首先要停止动画
101

Obj.ASC=true; //设定按正常顺序显示侦
102

Obj.ChangeImage(); // 开始动画
103

}
104

105

function MouseOut(Num)
106

{
107

var Obj=null;
108

if(Num==1)
109

Obj=Show1;
110

else if(Num==2)
111

Obj=Show2;
112

else if(Num==3)
113

Obj=Show3;
114

else if(Num==4)
115

Obj=Show4;
116

else if(Num==5)
117

Obj=Show5;
118

else if(Num==6)
119

Obj=Show6;
120

else if(Num==7)
121

Obj=Show7;
122

Obj.DeleteTimeOut();
123

Obj.ASC=false;//倒序显示侦
124

Obj.ChangeImage();
125

// alert(Show.NowIndex);
126

}
127

128

function Loaded()
129

{
130

Show1=new ImageShow({Obj:document.getElementById("ImgArea1"),TimeSpace:50,Images:Images1,BackGround:true});
131

Show2=new ImageShow({Obj:document.getElementById("ImgArea2"),TimeSpace:50,Images:Images2,BackGround:true});
132

Show3=new ImageShow({Obj:document.getElementById("ImgArea3"),TimeSpace:50,Images:Images3,BackGround:true});
133

Show4=new ImageShow({Obj:document.getElementById("ImgArea4"),TimeSpace:50,Images:Images4,BackGround:true});
134

Show5=new ImageShow({Obj:document.getElementById("ImgArea5"),TimeSpace:50,Images:Images5,BackGround:true});
135

Show6=new ImageShow({Obj:document.getElementById("ImgArea6"),TimeSpace:50,Images:Images6,BackGround:true});

136 Show7=new ImageShow({Obj:document.getElementById("ImgArea7"),TimeSpace:50,Images:Images7,BackGround:true});

//分别为每个图标动画生成一个动画对象

137

MouseOver(1); MouseOver(2);MouseOver(3);MouseOver(4);MouseOver(5);MouseOver(6);MouseOver(7);//页面载入后执行第一次动画，显示图标
138

}
139

Loaded();

欢迎大家一起交流，不是很善表述，但有对细节的疑问的话提出来很乐意回答，谢谢！

posted @ 2009-01-07 13:14 laoliao 阅读(3901) 评论(31) 编辑收藏举报

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Google首页的图标动画效果，很传神吧？自己也能完美实现，进来请看！！

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