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| <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta content="telephone=no" name="format-detection">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<style>
body{background: #051d44;}
.slideshow{position: relative;margin-top: 5px;height: 240px;padding: 0 40px;width:850px;}
.slideshow a{position: absolute;margin: auto;left:0;right:0;bottom: 0;top:0;display: inline-block;box-sizing: border-box;width: 540px;height: 200px;border: 1px solid #000305;transition: all 0.5s ease 0s , z-index 0s ease 0.15s;-webkit-transition: all 0.5s ease 0s , z-index 0s ease 0.15s;}
.slideshow a .mask{position: absolute;display: inline-block;width: 100%;height: 100%;background: #000000;opacity: 0.4;}
.slideshow a img{width: 100%;height: 100%;}
.slideshow a.leftScale{transform: translate3d(-40%,0,0) scale(0.88);-webkit-transform: translate3d(-40%,0,0) scale(0.88);z-index: 0;}
.slideshow a.rightScale{transform: translate3d(40%,0,0) scale(0.88);-webkit-transform: translate3d(40%,0,0) scale(0.88);z-index: 0;}
.slideshow a.top{z-index: 2;}
.slideshow a.bottom{transform: translate3d(0%,0,0) scale(0.88);-webkit-transform: translate3d(0%,0,0) scale(0.88);z-index: -1;}
.slideshow a.bottom span{opacity: 0.4;filter: opacity(0.4);-webkit-filter: opacity(0.4);}
.slideshow a.top span{opacity: 0;}
.slideshow .turnBox span{width: 22px;height: 38px;position: absolute;top: 50%;margin-top: -19px;cursor: pointer;display: inline-block;}
.slideshow .turnBox span.turnLeft{z-index: 99;background: url("//img.shenyujie.cc/2017-8-17-left.png") no-repeat;background-size: 22px 38px;}
.slideshow .turnBox span.turnRight{z-index: 99;right: 40px;background: url("//img.shenyujie.cc/2017-8-17-right.png") no-repeat;background-size: 22px 38px;}
.slideshow .turnBox span.turnLeft:hover{background: url("//img.shenyujie.cc/2017-8-17-left-hover.png") no-repeat;background-size: 22px 38px;}
.slideshow .turnBox span.turnRight:hover{right: 40px;background: url("//img.shenyujie.cc/2017-8-17-right-hover.png") no-repeat;background-size: 22px 38px;}
.slideshow .turnBox{opacity: 0;transition:opacity 0.6s ease;-webkit-transition:opacity 0.6s ease;}
.slideshow:hover .turnBox{opacity: 1;}
.slideshow ul{position: absolute;line-height: 0;bottom: 4px;left:50%;transform: translateX(-50%);-webkit-transform: translateX(-50%);font-size: 0;}
.slideshow ul li{display: inline-block;width: 20px;height: 2px;background: #465872;margin-left: 4px;cursor: pointer;}
.slideshow ul li:first-child{margin-left: 0;}
.slideshow ul li.on{background-color: #0184c8;}
</style>
<title>React 实现类似网易云音乐轮播图效果</title>
</head>
<body>
<div class="slideshow" id="example">
</body>
<script type="text/javascript" src="//js.shenyujie.cc/clone.js"></script>
<script type="text/javascript" src="//js.shenyujie.cc/react.js"></script>
<script type="text/javascript" src="//js.shenyujie.cc/react-dom.js"></script>
<script type="text/javascript" src="//js.shenyujie.cc/browser.min.js"></script>
<script type="text/babel">
var NotesList = React.createClass({
getInitialState: function() {
return {
position:[{
_className:'leftScale',
selected:true
},{
_className:'top',
selected:false
},{
_className:'rightScale',
selected:false
},{
_className:'bottom',
selected:false
}]
};
},
totalCount: 4,
topIndex: 1,
className:{left: 'leftScale', top: 'top', right: 'rightScale', bottom: 'bottom'},
calculatePos:function (index) {
var topIndex = index || this.topIndex;
return {
current: topIndex,
oldCurrent: index ? this.topIndex : -1,
next: (topIndex + 1) % this.totalCount,
nextTwo: (topIndex + 2) % this.totalCount,
previous: (topIndex + this.totalCount - 1) % this.totalCount,
previousTwo: (topIndex + this.totalCount - 2) % this.totalCount,
}
},
turnLeft:function () {
var pos = this.calculatePos();
var className = this.className;
var newState = window.extend.clone(true, {}, this.state);
var newPos = newState.position.forEach((x, index) => {
switch(index){
case pos.previousTwo:
newState.position[index]._className = className.left;
newState.position[index].selected = true;
break;
case pos.previous:
newState.position[index]._className = className.top;
newState.position[index].selected = false;
break;
case pos.current:
newState.position[index]._className = className.right;
newState.position[index].selected = false;
break;
case pos.next:
newState.position[index]._className = className.bottom;
newState.position[index].selected = false;
break;
}
});
this.setState(newState,()=>{
this.topIndex = pos.previous
})
},
turnRight:function () {
var pos = this.calculatePos();
var className = this.className;
var newState = window.extend.clone(true, {}, this.state);
var newPos = newState.position.forEach((x, index) => {
switch(index){
case pos.previous:
newState.position[index]._className = className.bottom;
newState.position[index].selected = false;
break;
case pos.current:
newState.position[index]._className = className.left;
newState.position[index].selected = true;
break;
case pos.next:
newState.position[index]._className = className.top;
newState.position[index].selected = false;
break;
case pos.nextTwo:
newState.position[index]._className = className.right;
newState.position[index].selected = false;
break;
}
});
this.setState(newState,()=>{
this.topIndex = pos.next
})
},
turnArbitrarily:function(index){
if(index === this.topIndex) return;
var pos = this.calculatePos(index);
var className = this.className;
var newState = window.extend.clone(true, {}, this.state);
var newPos = newState.position.forEach((x, index) => {
switch(index){
case pos.oldCurrent:
newState.position[index]._className = className.bottom;
newState.position[index].selected = false;
break;
case pos.current:
newState.position[index]._className = className.top;
newState.position[index].selected = false;
break;
case pos.next:
newState.position[index]._className = className.right;
newState.position[index].selected = false;
break;
case pos.previous:
newState.position[index]._className = className.left;
newState.position[index].selected = true;
break;
}
});
this.setState(newState,()=>{
this.topIndex = pos.next
})
},
picTurn: function(index){
var pos = this.calculatePos();
if(index === pos.next){this.turnRight()}
else if(index === pos.previous){this.turnLeft()}
else{this.turnArbitrarily(index)}
},
render: function() {
return (
<div>
<a className={this.state.position[0]._className} href="javascript:void(0);" onClick={()=>{this.picTurn(0)}}>
<span className="mask"></span>
<img src="//img.shenyujie.cc/2017-8-17-ss-1.png"/>
</a>
<a className={this.state.position[1]._className} href="javascript:void(0);" onClick={()=>{this.picTurn(1)}}>
<span className="mask"></span>
<img src="//img.shenyujie.cc/2017-8-17-ss-2.png"/>
</a>
<a className={this.state.position[2]._className} href="javascript:void(0);" onClick={()=>{this.picTurn(2)}}>
<span className="mask"></span>
<img src="//img.shenyujie.cc/2017-8-17-ss-3.png"/>
</a>
<a className={this.state.position[3]._className} href="javascript:void(0);" onClick={()=>{this.picTurn(3)}}>
<span className="mask"></span>
<img src="//img.shenyujie.cc/2017-8-17-ss-4.png"/>
</a>
<div className="turnBox">
<span className="turnLeft" onClick={this.turnLeft}></span>
<span className="turnRight" onClick={this.turnRight}></span>
</div>
<ul>
<li className={this.state.position[0].selected ? 'on' : ''} onMouseEnter={()=>{this.picTurn(1)}}></li>
<li className={this.state.position[1].selected ? 'on' : ''} onMouseEnter={()=>{this.picTurn(2)}}></li>
<li className={this.state.position[2].selected ? 'on' : ''} onMouseEnter={()=>{this.picTurn(3)}}></li>
<li className={this.state.position[3].selected ? 'on' : ''} onMouseEnter={()=>{this.picTurn(0)}}></li>
</ul>
</div>
);
}
});
ReactDOM.render(
<NotesList/>,
document.getElementById('example')
);
</script>
</html>
|
