javascript - 图像未加载并推入数组（javascript）

Question

我想通过循环遍历一个名为GameImages. 当我在 chrome 中查看开发人员控制台时，我不确定为什么没有加载图像。for 循环是否会中断图像的加载？如何循环加载图像而不是编写每个 onload 函数？

var i = 1; //set increment variable

var GameImages = { //object to hold each image

    game1 : new Image(),
    game2 : new Image(),
    game3 : new Image(),
    game4 : new Image(),
    game5 : new Image(),

};

for(gameImage in GameImages) { //loop through each image

    gameImage.onload = function () { //set the onload function for the current image

        gamePosters.push(gameImage);
        console.log(gamePosters.length); //print out the new size of the gamePosters array

    };

    //give source of image. (my images are named game1.jpg, game2.jpg, etc.)
    gameImage.src = "images/assets/posters/games/game" + i + ".jpg";

    i += 1; //increment i
}

Answer 1

这是因为您正在for (gameImage in GameImages)循环遍历您的每个 GameImage 对象的属性（即，gameImage 首先是“game1”，然后是“game2”，等等）。将您的代码更改为：

for (game in GameImages) {

   var gameImage = GameImages[game]; // This will get your actual Image
   gameImage.onload = function () { 

       gamePosters.push(gameImage);
       console.log(gamePosters.length); 

   };

   //give source of image. (my images are named game1.jpg, game2.jpg, etc.)
   gameImage.src = "images/assets/posters/games/game" + i + ".jpg";

   i += 1; //increment i
}