预加载图片

imageData为保存图片路径的数组

function ImgLoading(imageData) {
    ......//这里可以显示个图片加载时的提示框
    //加载图片
    var imgWrap = [];
    for (var i = 0; i < imageData.length; i++) {
        imgWrap[i] = new Image()
        imgWrap[i].src = imageData[i]
        imgWrap[i].onload = function () {
             //回调函数
        }
    }
}

 

转载于:https://www.cnblogs.com/stubborn-donkey/p/9717491.html