使用 appendTo 使 div 更改父项 [英] Using appendTo to make a div change parents

问题描述

因此，我决定学习使用 JS 和 jQuery 编程的最佳方式是尝试构建我喜欢的东西.所以我决定使用最少的 HTML 和主要的 JS 和 Jquery 来制作我自己的国际象棋棋盘.

So I decided that the best way for me to learn to program with JS and jQuery was to try and build something that I liked. So I decided to make my own Chess board using minimal HTML and Mostly JS and Jquery.

下面的代码渲染一个板并在图块的起始位置插入图像.

The code below renders a board and inserts images on the starting positions of the tiles.

$(document).ready(function(){
    //draw the chess board
    var amount = 0;
    var columnColor = "Black";
    while(amount < 64){
        if(amount % 9 === 0){
            amount++
        }
        else if (amount < 18){
            $(".mainWrapper").append('<div class="block'+columnColor+'"><img class="pawn" src="images/whitePawn.png" alt="White Pawn" height="42" width="42"></div>')
            amount++
        }
        else if (amount > 45){
            $(".mainWrapper").append('<div class="block'+columnColor+'"><img class="pawn" src="images/blackPawn.png" alt="White Pawn" height="42" width="42"></div>')
            amount++
        }
        else{
            $(".mainWrapper").append('<div class="block'+columnColor+'"></div>')
            amount++
        }
        switch (columnColor){
            case "White": 
                columnColor = "Black";
                break;
            case "Black":
                columnColor = "White";
                break;
        }
    };
});

console.log("I ran! :D");

我的下一步是让碎片能够移动.现在一开始我想我会通过使用 jQuery 他的 .draggable 方法来做到这一点.哪个有效(有点)但没有做我想要的，因为它不会以干净的方式移动它们(碎片可以重叠方块)并且它不限制用户可以移动的方块数量.

My next step would be to make the pieces be able to move. Now at first I figured I would do this by using jQuery his .draggable method. Which works (sort of) but doesn't do what I want it to since it doesn't move them in a clean way (pieces can overlap squares) and it doesn't limit the amount of squares a user can move.

后来在谷歌上快速搜索，我发现了这个 在 Stackoverflow 上发帖.他们在那里描述了一种使用 appendTo 将项目移动到另一个父 div 的方法.这对我的情况来说是完美的(至少我认为).

So a quick google search later and I found THIS post on Stackoverflow. There they described a way to use appendTo to move items to another parent div. This would be perfect (at least I think) for my situation.

虽然我对 JS 的理解仍然有限，但我无法理解如何做到这一点.

Although since my understanding of JS is still limited I cant wrap my head around how to do that.

我知道您需要为所选图像使用某种选择器类.然后需要一个 click 事件，将选中的图片移动到你点击的 div 上.

I understand that you would need some kind of selector class for a selected image. Then there needs to be a click event that moves the selected image to the div you clicked on.

只是为了您的娱乐，我无法超越这个.

Just for your entertainment I couldn't surpass THIS.

感谢任何帮助或提示！

推荐答案

您可以将一个字段上的 mousedown 与相邻字段上的 mouseup 组合起来:

You could combine a mousedown on one field with a mouseup on the adjacent one :

演示

var piece;

$('div').mousedown(function(e) {

    e.preventDefault();
    piece = $(this).find('img');
})
.mouseup(function() {

    $(this).append(piece); // same as piece.appendTo(this);     
});

当然距离还没有限制，它不适用于整个领域(如果有图像).

There's no limit to the distance yet of course and it ill work for the whole field (if there is an image).

我添加了一个 preventDefault() 所以没有选择使拖动复杂化的元素.

I've added a preventDefault() so there's no selection of the element which complicates dragging.

为了包含这些片段，您可能必须使用字段的坐标来获得直接的方法.您可能想为此查看 e.clientX 和 getBoundingClientRect.

For containing the pieces you'll probably have to work with the coordinates of the fields for a straight forward approach. You might wanna look into e.clientX and getBoundingClientRect for that.

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