矩形图像的圆裁剪

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Try this:

img {
height: auto;
width: 100%;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
-ms-border-radius: 50%;
-o-border-radius: 50%;
border-radius: 50%;
}

DEMO here.

OR:

.rounded {
height: 100px;
width: 100px;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
-ms-border-radius: 50%;
-o-border-radius: 50%;
border-radius: 50%;
background:url("http://www.electricvelocity.com.au/Upload/Blogs/smart-e-bike-side_2.jpg") center no-repeat;
background-size:cover;
}

DEMO here.

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最佳答案

The approach is wrong, you need to apply the border-radius to the container div instead of the actual image.

This would work:

.image-cropper {
width: 100px;
height: 100px;
position: relative;
overflow: hidden;
border-radius: 50%;
}


img {
display: inline;
margin: 0 auto;
height: 100%;
width: auto;
}

<div class="image-cropper">
<img src="https://via.placeholder.com/150" class="rounded" />
</div>

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You need to use jQuery to do this. This approach gives you the abbility to have dynamic images and do them round no matter the size.

My demo has one flaw right now I don't center the image in the container, but ill return to it in a minute (need to finish a script I'm working on).

DEMO

<div class="container">
<img src="" class="image" alt="lambo" />
</div>


//script
var container = $('.container'),
image = container.find('img');


container.width(image.height());




//css
.container {
height: auto;
overflow: hidden;
border-radius: 50%;
}


.image {
height: 100%;
display: block;
}

小开

If you can live without the <img> tag, I suggest you use the photo as a background image.

.cropcircle{
width: 250px;
height: 250px;
border-radius: 100%;
background: #eee no-repeat center;
background-size: cover;
}


#image1{
background-image: url(http://www.voont.com/files/images/edit/7-ridiculous-ways-boost-self-esteem/happy.jpg);
}

<div id="image1" class="cropcircle"></div>

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Johnny's solution is good. I found that adding min-width:100%, really helps images fill the entire circle. You could do this with a combination of JavaScript to get optimal results or use ImageMagick - http://www.imagemagick.org/script/index.php if you're really serious about getting it right.

.image-cropper {


width: 35px;


height: 35px;


position: relative;


overflow: hidden;


border-radius: 50%;


}


.image-cropper__image {


display: inline;


margin: 0 auto;


height: 100%;


min-width: 100%;


}

<div class="image-cropper">
<img src="#" class="image-cropper__image">
</div>

小开

The object-fit property provides a non-hackish way for doing this (with image centered). It has been supported in major browsers for a few years now (Chrome/Safari since 2013, Firefox since 2015, and Edge since 2015) with the exception of Internet Explorer.

img.rounded {
object-fit: cover;
border-radius: 50%;
height: 100px;
width: 100px;
}

<img src="https://picsum.photos/200/300" class="rounded">

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I know many of the solutions mentioned above works, you can as well try flex.

But my image was rectangular and not fitting properly. so this is what i did.

.parentDivClass {
position: relative;
height: 100px;
width: 100px;
overflow: hidden;
border-radius: 50%;
margin: 20px;
display: flex;
justify-content: center;
}

and for the image inside, you can use,

child Img {
display: block;
margin: 0 auto;
height: 100%;
width: auto;
}

This is helpful when you are using bootstrap 4 classes.

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insert the image and then backhand all you need is:

<style>
img {
border-radius: 50%;
}
</style>

** the image code will be here automatically**

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The best way I've been able to do this is with using the new css object-fit (1) property and the padding-bottom (2) hack.

You need a wrapper element around the image. You can use whatever you want, but I like using the new HTML picture tag.

.rounded {
display: block;
width: 100%;
height: 0;
padding-bottom: 100%;
border-radius: 50%;
overflow: hidden;
}


.rounded img {
width: 100%;
height: 100%;
object-fit: cover;
}




/* These classes just used for demo */
.w25 {
width: 25%;
}


.w50 {
width: 50%;
}

<div class="w25">
<picture class="rounded">
<img src="https://i.imgur.com/A8eQsll.jpg">
</picture>
</div>


<!-- example using a div -->
<div class="w50">
<div class="rounded">
<img src="https://i.imgur.com/A8eQsll.jpg">
</div>
</div>


<picture class="rounded">
<img src="https://i.imgur.com/A8eQsll.jpg">
</picture>

References

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The accepted answer probably works for some situations, but it depends on the ratio of the rectangle and any predetermined styles.

I use this method because it's more compatible than solutions only using object-fit:

.image-cropper {
width: 150px;
height: 150px;
position: relative;
overflow: hidden;
border-radius: 50%;
border:2px solid #f00;
}


/* Common img styles in web dev environments */
img {
height: auto;
max-width: 100%;
}


/* Center image inside of parent */
img.center {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}


/* For horizontal rectangles */
img.horizontal {
height: 100%;
width: auto;
max-width: 9999px; /* max-content fall back */
max-width: max-content;
}

<div class="image-cropper">
<img src="https://via.placeholder.com/300x600" class="center" />
</div>


<div class="image-cropper">
<img src="https://via.placeholder.com/600x300" class="horizontal center" />
</div>

If you run the snippet you can see, for horizontal rectangles we add another class .horizontal.

We override max-width to allow the img to go larger than 100% of the width. This preserves the aspect ratio, preventing the image from stretching.

However, the image will not be centered and that's where the .centered class comes in. It uses a great centering trick to absolute position the image in the center both vertically and horizontally.

More information on the centering at CSS Tricks

More than likely you won't always know what ratio the image will be, so this is why I'd suggest using javascript to target the img and add the .horizontal class if needed.

Here is a stack overflow answer that would work

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A simple one liner.

clip-path: circle();