这是一款基于jquery ui的可自由拖拽的弹性圆形菜单效果。该圆形菜单可以通过点击一个圆形按钮来弹出4个子菜单按钮。弹性效果由anime.js来制作，效果非常炫酷。

使用方法

在页面中引入jquery和jqueryui文件，以及anime.js和需要的样式文件style.css。

<link rel="stylesheet" href="css/style.css">
<script src="path/to/jquery.min.js"></script>
<script src="path/to/jquery-ui.min.js"></script>
<script src="path/to/anime.js"></script>
                

HTML结构

圆形菜单的HTML结构如下：

<div class="center menu">
    <div id="myMenu"></div>
</div>
                

初始化插件

在页面DOM元素加载完毕之后，通过下面的js代码来完成圆形菜单的拖拽功能，以及弹性效果。

var timeOut;

class Item {
    constructor(icon, backgroundColor) {
        this.$element = $(document.createElement("div"));
        this.icon = icon;
        this.$element.addClass("item");
        this.$element.css("background-color", backgroundColor);
        var i = document.createElement("i");
        $(i).addClass("fi-" + icon);
        this.$element.append(i);
        this.prev = null;
        this.next = null;
        this.isMoving = false;
        var element = this;
        this.$element.on("mousemove", function() {
            clearTimeout(timeOut);
            timeOut = setTimeout(function() {
                if (element.next && element.isMoving) {
                    element.next.moveTo(element);
                } 
            }, 10);
        });
    }
    
    moveTo(item) {
        anime({
            targets: this.$element[0],
            left: item.$element.css("left"),
            top: item.$element.css("top"),
            duration: 700,
            elasticity: 500
        });
        if (this.next) {
            this.next.moveTo(item);
        }
    }

    updatePosition() {    
        anime({
            targets: this.$element[0],
            left: this.prev.$element.css("left"),
            top: this.prev.$element.css("top"),
            duration: 200
        });
        
        if (this.next) {
            this.next.updatePosition();
        }
    }
}

class Menu {
    constructor(menu) {
        this.$element = $(menu);
        this.size = 0;
        this.first = null;
        this.last = null;
        this.timeOut = null;
        this.hasMoved = false;
        this.status = "closed";
    }
    
    add(item) {
        var menu = this;
        if (this.first == null) {
            this.first = item;
            this.last = item;
            this.first.$element.on("mouseup", function() {
                if (menu.first.isMoving) {
                    menu.first.isMoving = false;        
                } else {
                    menu.click();
                }
            }); 
            item.$element.draggable(
                {
                    start: function() {
                        menu.close();
                        item.isMoving = true;
                    }  
                },
                {
                    drag: function() {
                        if (item.next) {
                            item.next.updatePosition();
                        }
                    }
                },
                {
                    stop: function() {
                        item.isMoving = false;
                        item.next.moveTo(item);
                    }
                }
            );
        } else {
            this.last.next = item;
            item.prev = this.last;
            this.last = item;
        }
        this.$element.after(item.$element);
        
        
    }
    
    open() {
        this.status = "open";
        var current = this.first.next;
        var iterator = 1;
        var head = this.first;
        var sens = head.$element.css("left") < head.$element.css("right")="" 1="" :="" -1;="" while="" (current="" !="null)" {="" anime({="" targets:="" current.$element[0],="" left:="" parseint(head.$element.css("left"),="" 10)="" +="" (sens="" *="" (iterator="" *="" 50)),="" top:="" head.$element.css("top"),="" duration:="" 500="" });="" iterator++;="" current="current.next;" }="" }="" close()="" {="" this.status="closed" ;="" var="" current="this.first.next;" var="" head="this.first;" var="" iterator="1;" while="" (current="" !="null)" {="" anime({="" targets:="" current.$element[0],="" left:="" head.$element.css("left"),="" top:="" head.$element.css("top"),="" duration:="" 500="" });="" iterator++;="" current="current.next;" }="" }="" click()="" {="" if="" (this.status="=" "closed")="" {="" this.open();="" }="" else="" {="" this.close();="" }="" }="" }="" var="" menu="new" menu("#mymenu");="" var="" item1="new" item("list");="" var="" item2="new" item("torso",="" "#ff5c5c");="" var="" item3="new" item("social-facebook",="" "#5cd1ff");="" var="" item4="new" item("paypal",="" "#fff15c");="" var="" item5="new" item("link",="" "#64f592");="" menu.add(item1);="" menu.add(item2);="" menu.add(item3);="" menu.add(item4);="" menu.add(item5);="" $(document).delay(50).queue(function(next)="" {="" menu.open();="" next();="" $(document).delay(1000).queue(function(next)="" {="" menu.close();="" next();="" });="" });="">

在线预览    源码下载