标签：etl als bbb event 事件 UNC 适配 函数 listener
pc端拖动时候用到的三个事件：mousedown、mousemove、mouseup
在移动端与之相对应的分别是：touchstart、touchmove、touchend事件。
还有一点要注意的是在PC端获取当前鼠标的坐标是：event.clientX和event.clientY，
在移动端获取坐标位置则是：event.touches[0].clientX和event.touches[0].clientY
//判断当前是touch还是click
var touch; if(event.touches) { touch = event.touches[0]; } else { touch = event; }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>适配移动端和pc端的拖动效果</title> <style> #div2 { position: relative; top: 0; left: 0; width: 100px; height: 100px; background: #bbbbbb; touch-action: none; } </style> </head> <body> <div id="div2"></div> <script> //是否拖动 var flag = false; // var cur = { x: 0, y: 0 } var nx, ny, dx, dy, x, y; function down() { flag = true; var touch; if(event.touches) { touch = event.touches[0]; } else { touch = event; } cur.x = touch.clientX; cur.y = touch.clientY; dx = div2.offsetLeft; dy = div2.offsetTop; } function move() { if(flag) { var touch; if(event.touches) { touch = event.touches[0]; } else { touch = event; } nx = touch.clientX - cur.x; ny = touch.clientY - cur.y; x = dx + nx; y = dy + ny; div2.style.left = x + "px"; div2.style.top = y + "px"; //阻止页面的滑动默认事件 document.addEventListener("touchmove", function() { event.preventDefault(); }, false); } } //鼠标释放时候的函数 function end() { flag = false; } var div2 = document.getElementById("div2"); div2.addEventListener("mousedown", function() { down(); }, false); div2.addEventListener("touchstart", function() { down(); }, false) div2.addEventListener("mousemove", function() { move(); }, false); div2.addEventListener("touchmove", function() { move(); }, false) document.body.addEventListener("mouseup", function() { end(); }, false); div2.addEventListener("touchend", function() { end(); }, false); </script> </body> </html>
标签：etl als bbb event 事件 UNC 适配 函数 listener
原文地址：https://www.cnblogs.com/150536FBB/p/9965806.html
