0
我想創建一個像拖動一個框（Hello World）到任何位置的東西，而第二個框（Follow World）將慢慢跟隨。拖動一個HTML框，並使用JavaScript創建另一個框
在下面的代碼中，拖動框很好，但後面的框不能正確跟隨。另外，拖動框不能掉落。
function startDrag(e) {
// determine event object
if (!e) {
var e = window.event;
}
// IE uses srcElement, others use target
var targ = e.target ? e.target : e.srcElement;
if (targ.className != 'dragme') {
return
};
// calculate event X, Y coordinates
offsetX = e.clientX;
offsetY = e.clientY;
// assign default values for top and left properties
if (!targ.style.left) {
targ.style.left = '0px'
};
if (!targ.style.top) {
targ.style.top = '0px'
};
// calculate integer values for top and left
// properties
coordX = parseInt(targ.style.left);
coordY = parseInt(targ.style.top);
drag = true;
// move div element
document.onmousemove = dragDiv;
return false;
}
function dragDiv(e) {
if (!drag) {
return
};
if (!e) {
var e = window.event
};
var targ = e.target ? e.target : e.srcElement;
// move div element
targ.style.left = coordX + e.clientX - offsetX + 'px';
targ.style.top = coordY + e.clientY - offsetY + 'px';
return false;
}
function stopDrag() {
timer();
drag = false;
}
window.onload = function() {
document.onmousedown = startDrag;
document.onmouseup = stopDrag;
}
function disp() {
var step = 1;
var y = document.getElementById('followme').offsetTop;
var x = document.getElementById('followme').offsetLeft;
var ty = document.getElementById('draggable').offsetTop;
var ty = document.getElementById('draggable').offsetLeft;
if (y < ty) {
y = y + step;
document.getElementById('followme').style.top = y + "px"; // vertical movment
} else {
if (x < tx) {
x = x + step;
document.getElementById('followme').style.left = x + "px"; // horizontal movment
}
}
}
function timer() {
disp();
var y = document.getElementById('followme').offsetTop;
var x = document.getElementById('followme').offsetLeft;
document.getElementById("msg").innerHTML = "X: " + tx + " Y : " + ty
my_time = setTimeout('timer()', 10);
}.dragme {
position: relative;
width: 60px;
height: 80px;
cursor: move;
}
.followme {
position: relative;
width: 60px;
height: 80px;
}
#draggable {
background-color: #ccc;
border: 1px solid #000;
}
#followme {
background-color: #ccc;
border: 1px solid #000;
}<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Drag and drop</title>
</head>
<body>
<div id='msg'></div>
<div id="draggable" class="dragme">"Hello World!"</div>
<div id="followme" class="followme">"Follow World!"</div>
你有沒有看到我的答案？如果你認爲它更好，你可以接受我的。 –
跟隨世界跟蹤新開發者說「Hello World」嗎？ –
我的片段受到名爲* It Follows *的電影的啓發。看着它，你會明白一切。 –