Question

我正在使用jquery创建一个图库。是否有可能使用jquery计算图像是横向还是纵向？

感谢您的支持。

Answer 1

您可以简单地比较图像的宽度和高度。

var someImg = $("#someId");
if (someImg.width() > someImg.height()){
    //it's a landscape
} else if (someImg.width() < someImg.height()){
    //it's a portrait
} else {
    //image width and height are equal, therefore it is square.
}

Answer 2

javascript函数下方将返回最适合的Orientation

function get_orientation(src){

img = new Image();
img.src = src;
var width = img.width;
var height = img.height;
height = height + height // Double the height to get best
//height = height + (height / 2) // Increase height by 50%

if(width > height) { 
return "landscape"; 
} else {
return "portrait";
}

}

Answer 3

这对我有用，使用自然高度/宽度来获得原始属性。

       function imageOrientation(src) {

            var orientation,
            img = new Image();
            img.src = src;

            if (img.naturalWidth > img.naturalHeight) {
                orientation = 'landscape';
            } else if (img.naturalWidth < img.naturalHeight) {
                orientation = 'portrait';
            } else {
                orientation = 'even';
            }

            return orientation;

        }

Answer 4

如果动态添加媒体或使用 dataUrl，则无法在将元素放入 DOM 之前访问大小。

图片

resolveImage(fileEntry) // implementation detail
  .then(src => {
    const img = document.importNode(itmp, true) // use a template or `createElement()`
    img.src = src // 'data:image/svg+xml;base64,PHN2Z...'
    img.onload = ({target: el}) => (el.height > el.width) ? el.classList.add('portrait') : el.classList.add('landscape')
    grid.appendChild(img)
  })

视频

resolveVideo(fileEntry)
  .then(({src, type}) => {
    const vid = document.importNode(vtmp, true)
    vid.type = type
    vid.src = src
    vid.onloadeddata = ({target: el}) => (el.videoHeight > el.videoWidth) ? el.classList.add('portrait') : el.classList.add('landscape')
    grid.appendChild(vid)
  })

如何计算图像是横向还是纵向

4 个答案: