以 HTML 和 CSS 的形式添加个人资料图片

Question

我正在创建一个表单，其中我需要用户的个人资料图片，并且我希望图片是圆形或矩形形式。默认情况下，图像区域应为黑色或虚拟图片。当用户点击该区域时，他/她可以选择一张图片，就像在 Facebook 或 Twitter 中上传个人资料图片一样。

我的表格

HTML

 <div class="signup-w3ls">
    <div class="signup-agile1">
        <form action="#" method="post">

            <div class="form-control">
                <label class="header">Profile Photo:</label>

                <input id="image" type="file" name="profile_photo" placeholder="Photo" required="" capture>
            </div>

            <div class="form-control">
                <label class="header">Store Name :</label>
                <input type="text" id="store_name" name="store_name" placeholder="Store Name" title="Please enter your First Name" required="">
            </div>

            <div class="form-control">
                <label class="header">Store Type :</label>
                <input type="text" id="store_type" name="store_type" placeholder="Store Type" title="Please enter your Last Name" required="">
            </div>

            <div class="form-control">
                <label class="header">Owner Type :</label>
                <input type="text" id="owner_type" name="owner_type" placeholder="Owner Type" title="Please enter a valid email" required="">
            </div>

            <div class="form-control">
                <label class="header">Website :</label>
                <input type="url" id="website" name="website" placeholder="Website" id="password1" required="">
            </div>

            <div class="form-control">
                <label class="header">Contact Number :</label>
                <input type="text" id="contact_number" name="contact_number" placeholder="Contact Number" required="">
            </div>

            <div class="form-control">
                <label class="header">Contact Email :</label>
                <input type="email" id="contact_email" name="contact_email" placeholder="Contact Email" required="">
            </div>

            <input type="submit" class="register" value="Register">

        </form>
    </div>
</div>

CSS

 .signup-w3ls {
    width: 50%;
    margin: 70px 25% 80%;
    padding: 0;
    display: table;
    position: relative;
}
.signup-agile1{
    width:100%;
    float:center;
}

.signup-w3ls .signup-agile1 .form-control {
    margin-bottom: 20px;
}
label.header {
    font-size: 16px;
    font-weight: 500;
    width: 215px;
    color: grey;
    margin-right:10px;
    text-align:justify;
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-block;
    font-family: 'Nunito', sans-serif;
}
input#image,input#store_name, input#store_type,input#owner_type, input#website,input#contact_number,input#contact_email {
    padding:0 40px;
    width:40%;
    height:55px;
    border: 1px solid #dadada;
    color: grey;
    text-align:justify;
    outline: none;
    letter-spacing: 1px;
    font-size: 16px;
    font-weight:normal;
    font-family: 'Muli', sans-serif;
    border-radius:30px;
    -webkit-border-radius:30px;
    -moz-border-radius:30px;
    -o-border-radius:30px;
    -ms-border-radius:30px;
}
input#image:focus,input#store_name:focus, input#store_type:focus,input#owner_type:focus, input#website:focus,input#contact_number:focus,input#contact_email:focus  {
    background-color:#f5f8fa !important;
    border:1px solid #dadada;
}
input::-webkit-input-placeholder {
color: grey;
}
input:-moz-placeholder { /* Firefox 18- */
color: grey;
}
input::-moz-placeholder {  /* Firefox 19+ */
color: grey;
}
input:-ms-input-placeholder {
color: grey;
}
.register {
    background-color: lightgreen;
    width: 52%;
    height: 55px;
    border: none;
    margin-left: 233px;
    cursor: pointer;
    color: #fff;
    outline: none;
    font-size: 20px;
    font-weight: normal;
    text-transform: uppercase;
    transition: all 0.5s ease-in-out;
    -webkit-transition: all 0.5s ease-in-out;
    -moz-transition: all 0.5s ease-in-out;
    -o-transition: all 0.5s ease-in-out;
    border-radius: 30px;
    -webkit-border-radius: 30px;
    -moz-border-radius: 30px;
    -o-border-radius: 30px;
    -ms-border-radius: 30px;
    font-family: 'Muli', sans-serif;
}
.register:hover {
    background-color:#36b051;
    color:#fff;
}

JSFIDDLE：- https://jsfiddle.net/7ao1qxLe/

原文由 Nakhhhh 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您可以做的是 隐藏输入，就像 单击 配置文件图像时单击它一样：

 $("#profileImage").click(function(e) {
    $("#imageUpload").click();
});

 #imageUpload
{
    display: none;
}

#profileImage
{
    cursor: pointer;
}

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<image id="profileImage" src="http://lorempixel.com/100/100" />
<input id="imageUpload" type="file"
       name="profile_photo" placeholder="Photo" required="" capture>

图像预览

您还可以为用户提供上传图像的预览：

 function previewProfileImage( uploader ) {
    //ensure a file was selected
    if (uploader.files && uploader.files[0]) {
        var imageFile = uploader.files[0];
        var reader = new FileReader();
        reader.onload = function (e) {
            //set the image data as source
            $('#profileImage').attr('src', e.target.result);
        }
        reader.readAsDataURL( imageFile );
    }
}

$("#imageUpload").change(function(){
    previewProfileImage( this );
});

效率说明： 如果您使用 createObjectURL 而不是将数据作为 URL 读取，则可以提高效率。

 function fasterPreview( uploader ) {
    if ( uploader.files && uploader.files[0] ){
          $('#profileImage').attr('src',
             window.URL.createObjectURL(uploader.files[0]) );
    }
}

正如您在 MDN 中看到的那样， URL.createObjectUrl 只会生成文件的 URL，而不必将其加载到 DOM 中，这对于大文件来说绝对是更可取的。

圆形图像裁剪

要显示裁剪成圆形的图像，您需要给它一个外部 div 并应用 border-radius 到它：

HTML：

 <div id="profile-container">
   <image id="profileImage" src="aDefaultImage.png" />
</div>

CSS：

 #profile-container {
    width: 150px;
    height: 150px;
    overflow: hidden;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    -ms-border-radius: 50%;
    -o-border-radius: 50%;
    border-radius: 50%;
}

完整的解决方案

此代码段将所有三个步骤放在一起：

 $("#profileImage").click(function(e) {
    $("#imageUpload").click();
});

function fasterPreview( uploader ) {
    if ( uploader.files && uploader.files[0] ){
          $('#profileImage').attr('src',
             window.URL.createObjectURL(uploader.files[0]) );
    }
}

$("#imageUpload").change(function(){
    fasterPreview( this );
});

 #imageUpload
{
    display: none;
}

#profileImage
{
    cursor: pointer;
}

#profile-container {
    width: 150px;
    height: 150px;
    overflow: hidden;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    -ms-border-radius: 50%;
    -o-border-radius: 50%;
    border-radius: 50%;
}

#profile-container img {
    width: 150px;
    height: 150px;
}

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="profile-container">
   <image id="profileImage" src="http://lorempixel.com/100/100" />
</div>
<input id="imageUpload" type="file"
       name="profile_photo" placeholder="Photo" required="" capture>

原文由 Martin Zikmund 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

 $("#profileImage").click(function(e) {
    $("#imageUpload").click();
});

function fasterPreview( uploader ) {
    if ( uploader.files && uploader.files[0] ){
          $('#profileImage').attr('src',
             window.URL.createObjectURL(uploader.files[0]) );
    }
}

$("#imageUpload").change(function(){
    fasterPreview( this );
});

 #imageUpload
{
    display: none;
}

#profileImage
{
    cursor: pointer;
}

#profile-container {
    width: 150px;
    height: 150px;
    overflow: hidden;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    -ms-border-radius: 50%;
    -o-border-radius: 50%;
    border-radius: 50%;
}

#profile-container img {
    width: 150px;
    height: 150px;
}

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="profile-container">
   <image id="profileImage" src="http://lorempixel.com/100/100" />
</div>
<input id="imageUpload" type="file"
       name="profile_photo" placeholder="Photo" required="" capture>

原文由 Mung Pham 发布，翻译遵循 CC BY-SA 3.0 许可协议