用js仿探探拖拽卡片的效果、飞卡片的效果，感觉挺酷，高级前端程序员必会

04-06 阅读 0评论

var obj = boxStack[i];

obj.style.left=left+‘px’;

obj.style.top=top+‘px’;

obj.style.marginLeft=marginLeft-i*6+‘px’;

obj.style.marginTop=marginTop-i*6+‘px’;

obj.style.zIndex=zIndex+i;

obj.style.width=(width+i*12)+‘px’;

obj.style.height=height+‘px’;

//obj.children[0].style.width=(width+i*12)+‘px’;

//obj.children[0].style.height=height+‘px’;

//每个卡片设置不同的颜色

switch (obj.id) {

case ‘card1’:

obj.style.background = ‘aliceblue’;

break;

case ‘card2’:

obj.style.background = ‘skyblue’;

break;

case ‘card3’:

obj.style.background = ‘powderblue’;

break;

case ‘card4’:

obj.style.background = ‘steelblue’;

break;

}

//拖动卡片的事件函数

function tran(e){

var e = e || window.event;

var target = e.target || e.srcElement;

console.log(target.id);

if(target.id){

//拖动当前的卡片

move_tran(target);

}

//点击box的事件函数

function tranBox(e){

var e = e || window.event;

var target = e.target || e.srcElement;

if(target.id){

if(target.id===‘div_box’){//点击div_box从最上面开始飞

move_tran(boxStack[boxStack.length-1]);

}

var moveFlag=false;//正在移动表示，有卡片正在移动，move 函数将不会被调用

function move_tran(obj,direction,step){

if(moveFlag) return ;//表示有卡片正在移动，move 函数将不会被调用

if(obj.timer) return ;//避免重复点击

moveFlag=true;//设置当前正在移动

step=step||0;

var cb = (function (){//回调函数

var speed=5;

var screenTotal=0;

var distance = 0;

var endFlag=false;

function init(){//处理初始步距

if(direction==‘top’||direction==‘bottom’){

speed=10;

screenTotal = window.screen.availHeight;

distance = Math.ceil((top+step)/screenTotal*100);

}else{

screenTotal = window.screen.availWidth;

distance = Math.ceil((left+step)/screenTotal*100);

}

init();

return function(){

//针对上下左右有不同的设置

if(direction==‘left’){

distance -= speed;

dire=‘left’;

if(distance

pdistance += speed;/p pdire=‘left’;/p p//超过一定范围就调整卡片/p pif(distance>=90){

endFlag=true;

}

if(endFlag){

//清除定时器

clearInterval(obj.timer);

obj.timer=null;

//把当前元素从盒子队列中移动到最前面

moveFlag=false;

var index = boxStack.findIndex(function(item){

return obj.id==item.id;

})

var cur = boxStack.splice(index,1);

boxStack.unshift(cur[0]);//添加到队列最前面

setTimeout(function(){

reset();//重新部署盒子

},50)//设置重写设置盒子样式的延时，看起来更舒服

return ;

}

console.log(“distance===”,distance)

//设置left或者top作移动

obj.style[dire]=distance +‘%’;

}

})();

obj.timer = setInterval(cb,35);

}

/* 鼠标拖动 */

分析：
获取鼠标实时移动的坐标；m_move_x,m_move_y
鼠标按下时的坐标；m_down_x,m_down_y
div的坐标；dx,dy
div的新坐标；ndx,ndy
最大边界maxX,maxY
鼠标相对位移 nx,ny

*/

var isDown = false;//记录鼠标状态

var recover = false;

var move_div;//要操作的div对象

var m_move_x,m_move_y,m_down_x,m_down_y,dx,dy,ndx,ndy,maxX,maxY,nx=0,ny=0;

//鼠标按下

function drag(e){

var e = e || event;

move_div = this;

isDown = true;

//获取鼠标按下时坐标

m_down_x = e.clientX;

m_down_y = e.clientY;

//实时更新div的坐标

dx = move_div.offsetLeft;

dy = move_div.offsetTop;

}

//鼠标移动

document.οnmοusemοve=function move(e){

var e = e || event;

//鼠标按下时移动才触发

if(isDown && move_div){

//获取鼠标移动实时坐标

m_move_x = e.clientX;

m_move_y = e.clientY;

nx = m_move_x-m_down_x;

ny = m_move_y-m_down_y;

if(Math.abs(nx)>=200){

move_tran(move_div,nx>0?‘right’:‘left’,nx);

isDown = false;

move_div= null;

return ;

}else if(Math.abs(ny)>=100){

move_tran(move_div,ny>0?‘bottom’:‘top’,ny);

isDown = false;

move_div= null;

return ;

}

var id = move_div.id.substr(4);

ndx = dx+nx-(id-1)*4;

ndy = dy+ny-(id-1)*4;

//设置拖动的边界

maxX = window.screen.availWidth-20-move_div.offsetWidth;

maxY = window.screen.availHeight-110-move_div.offsetHeight;

if(ndx
pndx=maxX;/p p}/p pif(ndy>=maxY){
ndy=maxY;

}

//把新div坐标值赋给div对象

move_div.style.left = ndx+“px”;

move_div.style.top = ndy+“px”;

}

}

//鼠标释放

document.οnmοuseup=function up(e){

var e = e || event;

//获取鼠标移动实时坐标

m_move_x = e.clientX;

m_move_y = e.clientY;

nx = m_move_x-m_down_x;

ny = m_move_y-m_down_y;

if(nx