应用场景是:iframe页面没有滚动条,在父窗体中出现滚动条,锚点标记就会失效,因为,锚点是根据当前窗口滚动条滚动窗口的,成为子窗体后没有了滚动条,自然不会滚动。
解决办法是:用js判断页面是否被嵌套,用js计算iframe在父窗体位置,锚点在firame中的位置,两者相加成为父窗体的滚动。
遇到问题:获取父窗体元素(因为有域限制,所有需要在网络环境下方位(即http://domain.com));父窗体嵌套多个iframe,判断是否是当前iframe页面。
代码:
父窗体页面 index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
<!doctype html> < html > < head > < title ></ title > < style type = "text/css" > *{ margin: 0; padding: 0; border: 0; } html, body{ width: 100%; height: 100%; } </ style > </ head > < body > < div style = "width:100%;background:#f00;height:500px;" ></ div > < a href = "" >dd</ a > < a href = "" >ddd</ a > < iframe name = "iframe2" id = "iframe2" src = "iframe.html?a=b&c=d" style = "width:100%;height:2060px;" ></ iframe > < iframe name = "iframe2" id = "iframe2" src = "iframe.html?a=d&c=b" style = "width:100%;height:2060px;" ></ iframe > </ body > </ html > |
子窗体页面iframe.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
<!doctype html> < html > < head > < title ></ title > < style type = "text/css" > a{ padding: 5px; border: 1px solid #f00; float: left; display: block; margin-right: 5px; } div{ width: 80%; margin: 10px auto; height: 500px; border: 1px solid #f00; font-size: 30px; } </ style > < script type = "text/javascript" src = "jquery-1.8.2.min.js" ></ script > < script type = "text/javascript" > $(function(){ //如果是iframe则需要在网络中访问,因为js里有域限制 //如果没有iframe则不进行处理, if(window!==window.top){ //获取top窗口中的iframe,如果有iframe嵌套过多,请自行修改 var iframeList=window.top.document.getElementsByTagName('iframe'); for(var i=0;i< iframeList.length ;i++){ //判断当前窗口是否循环中的iframe if(window.location.toString().indexOf(iframeList[i].getAttribute('src').toString())!=-1){ //等自己的所在iframe加载完成给a锚点加事件 window.top.document.getElementsByTagName('iframe')[i] .onload = function (){ //确定iframe在父窗体的距顶部距离 var top = window .top.document.getElementsByTagName('iframe')[i].offsetTop; $('a').each(function(){ var href = $(this).attr('href'); if(href.indexOf('#')!=-1){//判断是否是锚点而不是链接 var name = href .substring(href.indexOf('#')+1); $(this).bind('click',function(){ $('a').each(function(){ if($(this).attr('name')==name){ //父窗口滚动 $(window.parent).scrollTop($(this).offset().top+top); } }); }); } }); } } } } }); </script> </ head > < body > < a href = "#a" rel = "external nofollow" >a</ a > < a href = "#b" rel = "external nofollow" >b</ a > < a href = "#c" rel = "external nofollow" >c</ a > < a href = "#d" rel = "external nofollow" >d</ a > < div >< a href = "" name = " rel=" external nofollow" rel = "external nofollow" rel = "external nofollow" rel = "external nofollow" a">A</ a ></ div > < div >< a href = "" name = " rel=" external nofollow" rel = "external nofollow" rel = "external nofollow" rel = "external nofollow" b">B</ a ></ div > < div >< a href = "" name = " rel=" external nofollow" rel = "external nofollow" rel = "external nofollow" rel = "external nofollow" c">C</ a ></ div > < div >< a href = "" name = " rel=" external nofollow" rel = "external nofollow" rel = "external nofollow" rel = "external nofollow" d">D</ a ></ div > </ body > </ html > |