纯CSS3打造圆形菜单
原理是使用相对定位和绝对定位确定圆形菜单位置。
使用伪类选择器E:hover确定悬浮时候的效果,动画效果用CSS3的transition属性。
大概代码如下。
html:
<div id="at-plus-container"> <div id="bottom-positioner"> <div id="button"> <div id="info-bar"> <div style="display:block" class="info"> <ul> <li title="2人参与讨论" class="page user"><img src="assets/images/people.png"><span>2</span></li> <li title="3条评论" class="page comment"><img src="assets/images/comment.png"><span>3</span></li> <li title="我有6条评论" class="mine posted"><img src="assets/images/post.png"><span>6</span></li> <li title="被赞6次" class="mine like"><img src="assets/images/like.png"><span>6</span></li> </ul> </div> </div> <div id="control-ring-container"> <ul id="control-ring"> <li title="蒙板" class="mask button"></li> <li title="历史记录" class="history button"></li> <li title="消息" class="message button"><span class="unread">2</span></li> <li title="设置" class="setting button"></li> <li title="登录/注册" class="sign button"></li> </ul> </div> <div class="apb"> <div class="icon"></div> </div> </div> </div> </div>
css3:
html,body { text-align: center; width: 100%; height: 100%; } ul, li{ list-style-type: none; } #at-plus-container { position: relative; width: 150px; height: 150px; top:50%; left: 40%; } #button { width: 50px; height: 50px; } #button { position: relative; width: 150px; height: 150px; } .apb { position: absolute; top:50%; left: 40%; width: 25px; height: 25px; line-height: 50px; background: ; background: url("assets/images/atplus_white.png") rgba(3,3,3,0.5) no-repeat center; background-size: 25px; border-radius: 50%; } #button:hover .apb { width: 50px; height: 50px; background: url("assets/images/atplus_green.png") rgba(3,3,3,0.5) no-repeat center; background-size: 50px; } #info-bar { opacity: 0; border-radius: 50%; } #button:hover #info-bar{ opacity: 1; background: rgba(3,3,3,0.5); width: 100px; height: 100px; position: absolute; margin: 0; padding: 10px; top: -50px; left: 50px; -webkit-transition: all 0.4s ease-in-out; -moz-transition: all 0.4s ease-in-out; -ms-transition: all 0.4s ease-in-out; -o-transition: all 0.4s ease-in-out; transition: all 0.4s ease-in-out; } .info { position: absolute; } #button:hover .page { position: absolute; top:5px; } #button:hover .user { left: 5px; } #button:hover .comment { left: 55%; } #button:hover .mine { left: 65%; } #button:hover .posted { top: 25px; } #control-ring-container { opacity: 0; border-radius: 50%; width: 130px; height: 130px; } #button:hover #control-ring-container{ opacity: 1; width: 130px; height: 130px; position: absolute; margin: 0; padding: 10px; -webkit-transition: all 0.4s ease-in-out; -moz-transition: all 0.4s ease-in-out; -ms-transition: all 0.4s ease-in-out; -o-transition: all 0.4s ease-in-out; transition: all 0.4s ease-in-out; } .button { border-radius: 50%; } #button:hover .button { background: rgba(3,3,3,0.5); width: 50px; height: 50px; position: absolute; } #button:hover .mask { top: 15px; left: 0px; background: url("assets/images/mask.png") rgba(3,3,3,0.5) no-repeat center; } #button:hover .history { top: 70px; left: 5px; background: url("assets/images/history.png") rgba(3,3,3,0.5) no-repeat center; } #button:hover .message { top: 120px; left: 20px; background: url("assets/images/message.png") rgba(3,3,3,0.5) no-repeat center; } #button:hover .setting { top: 130px; left: 75px; background: url("assets/images/setting.png") rgba(3,3,3,0.5) no-repeat center; } #button:hover .sign { top: 80px; left: 120px; background: url("assets/images/signin.png") rgba(3,3,3,0.5) no-repeat center; /*background-size: 50px;*/ }
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