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所以我正在寫一個HTML文件，由iPad上的UIWebView在本地加載。頁面中的每個圖像都有一個「touchend」事件處理程序，它幾乎將圖像的src更改爲另一個圖像文件。當我這樣做時，由於某種原因，它會隨意更改其位置以及HTML樹中其他任何圖像元素的位置。這有什麼理由嗎？在iPad上從「touchend」事件更改圖像元素的「src」？
<html>
<head>
<title>Index</title>
</head>
<body>
<img id="backgroundImage" alt="" src="image445.jpg" />
<img id="lockerImage" alt="" src="locker.png" />
<img id="guyImage" alt="" src="guy.png" />
<img id="capImage" alt="" src="cap.png" />
<img id="maskImage" alt="" src="mask.png" />
<img id="shieldImage" alt="" src="shield.png" />
<img id="glovesImage" alt="" src="foldedGloves.png" />
<img id="bootsImage" alt="" src="foldedBoots.png" />
<img id="underGownImage" alt="" src="foldedUnderGown.png"/>
<img id="gownImage" alt="" src="gown.png" />
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
var guyImage;
var capImage;
var maskImage;
var shieldImage;
var gownImage;
var underGownImage;
var glovesImage;
var bootsImage;
var originalCapImageLocationX = 580;
var originalCapImageLocationY = 80;
var originalMaskImageLocationX = 720;
var originalMaskImageLocationY = 80;
var originalShieldImageLocationX = 650;
var originalShieldImageLocationY = 70;
var originalGownImageLocationX = 750;
var originalGownImageLocationY = 300;
var originalUnderGownImageLocationX = 600;
var originalUnderGownImageLocationY = 200;
var originalGlovesImageLocationX = 560;
var originalGlovesImageLocationY = 400;
var originalBootsImageLocationX = 620;
var originalBootsImageLocationY = 400;
var originalGuyImageLocationX = 150;
var originalGuyImageLocationY = 0;
$(document).ready(function() {
//Position the background and locker in the right positions
var backgroundImage = $("#backgroundImage");
backgroundImage.offset({ left:0, top:0});
var lockerImage = $("#lockerImage");
lockerImage.offset({left:$(document).width() - lockerImage.width(), top:0});
//Prevent the webview from scrolling
document.body.addEventListener("touchmove", function (event) {
event.preventDefault();
}, false);
//Get referneces of the images in html
guyImage = $("#guyImage");
capImage = document.getElementById("capImage");
maskImage = document.getElementById("maskImage");
shieldImage = document.getElementById("shieldImage");
gownImage = document.getElementById("gownImage");
glovesImage = document.getElementById("glovesImage");
bootsImage = document.getElementById("bootsImage");
underGownImage = document.getElementById("underGownImage");
//Add the drag event listeners to the images
capImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(capImage));
}
}, false);
maskImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(maskImage));
}
}, false);
shieldImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(shieldImage));
}
}, false);
gownImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(gownImage));
}
}, false);
underGownImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(underGownImage));
}
}, false);
glovesImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(glovesImage));
}
}, false);
bootsImage.addEventListener("touchmove", function (event) {
if (event.targetTouches.length == 1) {
var touch = event.targetTouches[0];
moveImageCenterTo(touch.pageX, touch.pageY, $(bootsImage));
}
}, false);
//Add the finger up events to the images
capImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(capImage));
var y = getCenterLocationY($(capImage));
if (isWithinGuysHead(x, y)) {
moveImageToLocation(getGuysHeadLeft() - 8, getGuysHeadTop(), $(capImage));
} else {
moveImageCenterTo(originalCapImageLocationX, originalCapImageLocationY, $(capImage));
}
}
}, false);
shieldImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(shieldImage));
var y = getCenterLocationY($(shieldImage));
if (isWithinGuysHead(x, y)) {
moveImageToLocation(getGuysHeadLeft() - 10, getGuysHeadTop() - 20 + (getGuysHeadBottom()/2), $(shieldImage));
} else {
moveImageCenterTo(originalShieldImageLocationX, originalShieldImageLocationY, $(shieldImage));
}
}
}, false);
maskImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(maskImage));
var y = getCenterLocationY($(maskImage));
if (isWithinGuysHead(x, y)) {
moveImageToLocation(getGuysHeadLeft() - 5, getGuysHeadTop() - 5 + (getGuysHeadBottom()/2), $(maskImage));
} else {
moveImageCenterTo(originalMaskImageLocationX, originalMaskImageLocationY, $(maskImage));
}
}
}, false);
gownImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(gownImage));
var y = getCenterLocationY($(gownImage));
if (isWithinGuysBody(x, y)) {
moveImageToLocation(getGuysXLocation() + 5, getGuysHeadBottom() - 8, $(gownImage));
} else {
moveImageCenterTo(originalGownImageLocationX, originalGownImageLocationY, $(gownImage));
}
}
}, false);
underGownImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(underGownImage));
var y = getCenterLocationY($(underGownImage));
if (isWithinGuysBody(x, y)) {
$(underGownImage).attr("src", "underGown.png");
moveImageToLocation(getGuysXLocation() + 25, getGuysHeadBottom() - 8, $(underGownImage));
} else {
$(underGownImage).attr("src","foldedUnderGown.png");
moveImageCenterTo(originalUnderGownImageLocationX, originalUnderGownImageLocationY, $(underGownImage));
}
}
}, false);
glovesImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(glovesImage));
var y = getCenterLocationY($(glovesImage));
if (isWithinAnyGuysHand(x, y)) {
$(glovesImage).attr("src","gloves.png");
moveImageToLocation(getGuysXLocation(), getGuysHandsTopEdge() - 28, $(glovesImage));
} else {
$(glovesImage).attr("src","foldedGloves.png");
moveImageCenterTo(originalGlovesImageLocationX, originalGlovesImageLocationY, $(glovesImage));
}
}
}, false);
bootsImage.addEventListener("touchend", function (event) {
if (event.changedTouches.length == 1) {
var x = getCenterLocationX($(bootsImage));
var y = getCenterLocationY($(bootsImage));
if (isWithinGuysFeet(x, y)) {
$(bootsImage).attr("src","boots.png");
moveImageToLocation(getGuysFeetLeftEdge() + 5, getGuysFeetTopEdge() - 5, $(bootsImage));
} else {
$(bootsImage).attr("src","foldedBoots.png");
moveImageCenterTo(originalBootsImageLocationX, originalBootsImageLocationY, $(bootsImage));
}
}
}, false);
//Move the images to their original locations
moveImageCenterTo(originalCapImageLocationX, originalCapImageLocationY, $(capImage));
moveImageCenterTo(originalMaskImageLocationX, originalMaskImageLocationY, $(maskImage));
moveImageCenterTo(originalShieldImageLocationX, originalShieldImageLocationY, $(shieldImage));
moveImageCenterTo(originalGownImageLocationX, originalGownImageLocationY, $(gownImage));
moveImageCenterTo(originalUnderGownImageLocationX, originalUnderGownImageLocationY, $(underGownImage));
moveImageCenterTo(originalGlovesImageLocationX, originalGlovesImageLocationY, $(glovesImage));
moveImageCenterTo(originalBootsImageLocationX, originalBootsImageLocationY, $(bootsImage));
moveImageToLocation(originalGuyImageLocationX, originalGuyImageLocationY, $(guyImage));
});
</script>
我剛剛發佈的相關代碼。在此先感謝:-)