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以下代码循环显示一组图像，并根据Highcharts标记（与图表上的点相关联的文本）的位置创建它们。它在桌面上的Chrome，FF，IE上效果很好，但在桌面或iOS上的Safar中都不起作用，甚至Chrome iOS也不显示图像。jQuery偏移量（）在Safari/Chrome中不起作用iOS
我得到的错误是：main.js：453 - 类型错误： '未定义' 不是（评估 'markerOffset.left'）
$.each(value, function(k, v){
var z = i;
// Store the current marker
var marker = $('text').filter(function() { if($(this).html() === k) { return $(this) } });
// Get the markers offset
var markerOffset = marker.offset();
// If in Firefox, set the marker height to 13 px
if(marker.height() == 0){
markerHeight = 13;
}
else{
markerHeight = marker.height();
}
// Get the image dimensions
// Create new image object and get the width and height
// The image has to be downloaded first
var img = new Image();
// Set the image location
img.src = v.img;
// When the image is downloaded, you can get the dimensions
img.onload = function(){
var imgHeight = img.height;
var imgDivHeight = img.height;
var imgWidth = img.width;
// If the image Width is more than 90px, resize it
if(imgWidth > 50){
imgDivHeight = imgHeight/(imgWidth/50);
imgHeight = (imgHeight/(imgWidth/50)) + 5;
imgWidth = 50;
}
// Create the offset values based on the image sizes
**// THIS IS LINE 453**
var imgLeft = markerOffset.left - ((imgWidth - marker[0].getComputedTextLength())/2);
var imgTop = markerOffset.top - (imgHeight - (markerHeight/4));
// Create an element for each value.img and make it position absolute and set the offset of the marker
$('.charts-inner').prepend('<div class="series-data series-picture-wrapper ' + hidden + ' image-on-chart" data-id="' + k + '" data-series="' + key + '" data-position-top="' + (imgTop - $('.app-ui-top').height() - (markerHeight)) + '" data-position-left="' + (imgLeft - ($('.app-ui-menu').width() + 3)) + '" data-hidden="' + hiddenAttr + '" style="z-index: ' + (5555 + z) + '; top:' + (imgTop - $('.app-ui-top').height() - (markerHeight)) + 'px; left:' + (imgLeft - ($('.app-ui-menu').width() + 3)) + 'px; width:' + imgWidth + 'px; height:' + imgDivHeight + 'px"><img src="' + v.img + '" style="width:' + imgWidth + 'px" /><div class="app-tooltip-stock nodisplay">' + v.tooltip + '</div></div>');
}
})