Question

这是我的图片上传代码，现在我想裁剪所选图片。

请帮我剪裁所选图片。

我的裁剪最大尺寸是145X190像素

我的图片上传代码是

此：

    <!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
<title>jQuery UI Tooltip - Default functionality</title>
<script src="http://deepliquid.com/projects/Jcrop/js/jquery.min.js"></script>
        <script src="http://deepliquid.com/projects/Jcrop/js/jquery.Jcrop.js"></script>
        <link rel="stylesheet" href="http://deepliquid.com/projects/Jcrop/css/jquery.Jcrop.css" type="text/css" />
        <link rel="stylesheet" href="http://deepliquid.com/projects/Jcrop/demos/demo_files/demos.css" type="text/css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<script >
$(function () { 
function readImage(file) {

    var reader = new FileReader();
    var image = new Image();
    var maxw = 600;
    var maxh = 600;

    reader.readAsDataURL(file);
    reader.onload = function (_file) {
        image.src = _file.target.result; // url.createObjectURL(file);
        image.onload = function () {
            var w = this.width,
                h = this.height,
                t = file.type, // ext only: // file.type.split('/')[1],
                n = file.name,
                s = ~~ (file.size / 1024) + 'KB';
            if (  h > maxh || w > maxw) {
                alert("Height and width is bigger then over max criteria pls select image max height and width                                            =2024X2024");
                alert(w);
                alert(h);
            } else {
alert(w);
                alert(h);

                $('#uploadPreview').html('<img src="' + this.src + '"> ' + w + 'x' + h + ' ' + s + ' ' + t + ' ' + n + '<br>');
            }

        };
        image.onerror = function () {
            alert('Invalid file type: ' + file.type);
        };
    };

}

$("#choose").change(function (e) {
    if (this.disabled) return alert('File upload not supported!');
    var F = this.files;
    if (F && F[0]) for (var i = 0; i < F.length; i++) readImage(F[i]);
});

$(function(){

    $('image.src').Jcrop({
        onChange: showPreview,
        onSelect: showPreview,
        aspectRatio: 1
    });

});

function showPreview(coords)
{
    var rx = 100 / coords.w;
    var ry = 100 / coords.h;

    $('#uploadPreview1').css({
        width: Math.round(rx * 500) + 'px',
        height: Math.round(ry * 370) + 'px',
        marginLeft: '-' + Math.round(rx * coords.x) + 'px',
        marginTop: '-' + Math.round(ry * coords.y) + 'px'
    });
}

});




</script>



<style>



</style>
</head>
<body >
<input type="file" id="choose" multiple="multiple"   />
<br>
<div id="uploadPreview" ></div>
<div id="uploadPreview1" ></div>


</body>
</html>

现在我要裁剪image.hope你了解我的代码。

Answer 1

虽然我还没有理解您的完整代码，但看起来您还没有实现裁剪功能。如果我错了，请纠正我。但是要实现裁剪，您可以使用JQuery中的Jcrop插件。

如果我误解了您的查询，请告诉我。

Answer 2

您已经导入了jquery.min，因此您不必导入“jquery-1.9.1.js”。除此之外，您可能需要在创建图像标记后立即调用Jcrop。我对您的代码进行了修改，我能够裁剪上传的图像。

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
<title>jQuery UI Tooltip - Default functionality</title>
<script src="http://deepliquid.com/projects/Jcrop/js/jquery.min.js"></script>
        <script src="http://deepliquid.com/projects/Jcrop/js/jquery.Jcrop.js"></script>
        <link rel="stylesheet" href="http://deepliquid.com/projects/Jcrop/css/jquery.Jcrop.css" type="text/css" />
        <link rel="stylesheet" href="http://deepliquid.com/projects/Jcrop/demos/demo_files/demos.css" type="text/css" />
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<script >
$(function () { 
function readImage(file) {

    var reader = new FileReader();
    var image = new Image();
    var maxw = 600;
    var maxh = 600;

    reader.readAsDataURL(file);
    reader.onload = function (_file) {
        image.src = _file.target.result; // url.createObjectURL(file);
        image.onload = function () {
            var w = this.width,
                h = this.height,
                t = file.type, // ext only: // file.type.split('/')[1],
                n = file.name,
                s = ~~ (file.size / 1024) + 'KB';
            if (  h > maxh || w > maxw) {
                alert("Height and width is bigger then over max criteria pls select image max height and width                                            =2024X2024");
                alert(w);
                alert(h);
            } else {
                alert(w);
                alert(h);
                $('#uploadPreview').html('<img  id="myImage" src="' + this.src + '"> ' + w + 'x' + h + ' ' + s + ' ' + t + ' ' + n + '<br>');
                $('#myImage').Jcrop({
                    onChange: showPreview,
                    onSelect: showPreview,
                    aspectRatio: 1
                });
            }

        };
        image.onerror = function () {
            alert('Invalid file type: ' + file.type);
        };
    };

}

$("#choose").change(function (e) {
    if (this.disabled) return alert('File upload not supported!');
    var F = this.files;
    if (F && F[0]) for (var i = 0; i < F.length; i++) readImage(F[i]);
});


function showPreview(coords)
{
    var rx = 100 / coords.w;
    var ry = 100 / coords.h;

    $('#uploadPreview1').css({
        width: Math.round(rx * 500) + 'px',
        height: Math.round(ry * 370) + 'px',
        marginLeft: '-' + Math.round(rx * coords.x) + 'px',
        marginTop: '-' + Math.round(ry * coords.y) + 'px'
    });
}

});




</script>



<style>



</style>
</head>
<body >
<input type="file" id="choose" multiple="multiple"   />
<br>
<div id="uploadPreview" ></div>
<div id="uploadPreview1" ></div>


</body>
</html>

上传后裁剪图像

2 个答案: