pc端移动端拖拽实现

曾经终败给现在 2021-12-21 23:47 394阅读 0赞

#div1 {
    		width: 100px;
    		height: 100px;
    		background: red;
    		position: absolute;
    	}

html

1     window.onload = function () {
     2         var oDiv = document.getElementById('div1');
     3         //pc端
     4         oDiv.onmousedown = function (ev) {
     5             var oEvent = ev || event; //需要获取和事件相关的信息时使用
     6             var disX = oEvent.clientX - oDiv.offsetLeft;
     7             var disY = oEvent.clientY - oDiv.offsetTop;
     8 
     9             document.onmousemove = function (ev) {
    10                 var oEvent = ev || event;
    11                 var l = oEvent.clientX - disX;
    12                 var t = oEvent.clientY - disY;
    13 
    14                 if (l < 0) {
    15                     l = 0;
    16                 } else if (l > document.documentElement.clientWidth - oDiv.offsetWidth) {
    17                     l = document.documentElement.clientWidth - oDiv.offsetWidth;
    18                 }
    19 
    20                 if (t < 0) {
    21                     t = 0;
    22                 } else if (t > document.documentElement.clientHeight - oDiv.offsetHeight) {
    23                     t = document.documentElement.clientHeight - oDiv.offsetHeight;
    24                 }
    25 
    26                 oDiv.style.left = l + 'px';
    27                 oDiv.style.top = t + 'px';
    28             };
    29 
    30             document.onmouseup = function () {
    31                 document.onmousemove = null;
    32                 document.onmouseup = null;
    33             };
    34         };
    35         //移动端
    36         // 拖拽
    37         // 获取节点
    38         var block = document.getElementById("right");
    39         var oW, oH;
    40         // 绑定touchstart事件
    41         oDiv.addEventListener("touchstart", function (e) {
    42             var touches = e.touches[0];
    43             oW = touches.clientX - oDiv.offsetLeft;
    44             oH = touches.clientY - oDiv.offsetTop;
    45             //阻止页面的滑动默认事件
    46             document.addEventListener("touchmove", defaultEvent, false);
    47         }, false);
    48         oDiv.addEventListener("touchmove", function (e) {
    49             var touches = e.touches[0];
    50             var oLeft = touches.clientX - oW;
    51             var oTop = touches.clientY - oH;
    52             if (oLeft < 0) {
    53                 oLeft = 0;
    54             } else if (oLeft > document.documentElement.clientWidth - oDiv.offsetWidth) {
    55                 oLeft = (document.documentElement.clientWidth - oDiv.offsetWidth);
    56             }
    57             oDiv.style.left = oLeft + "px";
    58             oDiv.style.top = oTop + "px";
    59         }, false);
    60         oDiv.addEventListener("touchend", function () {
    61             document.removeEventListener("touchmove", defaultEvent, false);
    62         }, false);
    63 
    64         function defaultEvent(e) {
    65             e.preventDefault();
    66         };
    67     };

转载于:https://www.cnblogs.com/NB-JDzhou/p/8430142.html