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APP
WAP中实现文字滚动动画 [WAP]
所属分类
:[网络编程] |
创建时间
:2013-01-13 |
文章属性
:原创 |
文章来源
:http://windfly.cn |
作者
:windfly
<p>   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span> </span>首先说说动画,学FLASH的人就马上会想到帧,在单位时间内播放多少帧就能实现动画的效果(不过文字滚动在HTML网页中也能用marquee实现效果) </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>WAP中实现文字滚动的效果就只能利用动画的原理实现,因为WML中没有marquee,但是有CARD 的ontimer事件 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>ontimer类似<meta http-equiv="refresh" content="300;url=main.asp">和JAVASCRIPT中的setTimeout方法,用于指定一个事件。当<timer/> 标签指定的时间到期后,浏览器就执行ontimer所指定的这个事件。 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>ontimer可以是一个URL地址,一个卡片组,一个WML网页,一幅图像或其他符合URL定位的规则的文件。 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><font color="red"><span><timer/>标签指定的时间为正整数,单位大小为1/10秒。</span></font> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><font color="red"><span>ontimer时间只能包含在card元素或template元素的标签中进行定义</span></font>,其语法形式如下: </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            <card id="name" title="label" newcontext="boolean" ordered="true" onenterforward="href" onenterbackward="href" ontimer="href"></span> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: .75in; margin-right: 0in"> <span>            </span>内容(content) </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span></card> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>或: </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><template onenterforward="href" onenterbackward="href" ontimer="href"> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: .75in; margin-right: 0in"> <span>            </span>内容(content) </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span></template> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>ontimer事件只有一个属性,即ontimer。 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>它用于指定一个超链(href)的URL地址,指定时间timer过期的时候,用户浏览器就会按照超链(href)的URL打开相应的卡片或者文件。 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>先测试一个例子 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><card id="c1" title="c1" ontimer="#c2"> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>             <timer value="20"/></span> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: .75in; margin-right: 0in"> <span>            </span>X1 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span></card> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><card id="c2" title="c2" ontimer="#c1"> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: .75in; margin-right: 0in"> <span>            </span>X2 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><timer value="50"/><span>  </span> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span></card> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>效果为:打开页面后显示X1 2秒后跳到第二个名为C2的CARD 显示X2 5秒后跳回第一个卡片 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>一般HTML页面中文字滚动效果都是自下而上 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>可以做这样的设计 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>第一个卡片显示内容 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in">   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in">   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in">   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>XXXXXXXXXXXXXXXXXX </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in">   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>代码为: </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><br/><br/><br/> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>XXXXXXXXXXXXXXXXXX </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>第二个卡片显示内容 </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in">   </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>XXXXXXXXXXXXXXXXXX </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>代码为: </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span><br/><br/> </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>XXXXXXXXXXXXXXXXXX </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>------------------ </p> <p style="margin-top: 0in; margin-bottom: 0in; margin-left: 0in; margin-right: 0in"> <span>            </span>这样配合ONTIMER事件就能实现文字向上移一行的效果 </p>
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