在<a> tag

Question

I know this question has been asked before, but the solutions out there did not work for me.

中调整图像大小

这是我的图片，最大宽度和最大高度设置为100％。

即使将max-width和max-height设置为50％，我的图像仍然无法正确显示。它没有居中。

这是我的代码：

 .container-header {
  width: 100%;
  height: 8%;
  display: flex;
  flex-direction: column;
  background: #e3f0da 
}

.container-nav {
  height: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  /* x-axis */
  align-items: center;
  /* y-axis */
  font-size: 1.8em;
  background: #f2f2e2
}

li {
  list-style-type: none;
  margin: 0 15px 0 15px
}

a {
  text-decoration: none
}

img { 
  max-width: 50%;
  max-height: 50%;
}

 <div class="container-header">
        <div class="container-nav">
                <li><a href="#">Portfolio</a></li>
                <li><a href="#">Resume</a></li>
                <li><a href="#"><img src="img/logo.png"></a></li>
                <li><a href="#">About Me</a></li>
                <li><a href="#">Contact</a></li>
        </div>
    </div>

Answer 1

将$ node -v v9.9.0 $ npm -v 6.2.0 $ ruby -v ruby 2.5.1p57 (2018-03-29 revision 63029) [x64-mingw32] $ bundler -v Bundler version 1.16.3 元素显示为a，然后可以使用block将其居中。

test-align

li a {
  display: block;
  text-align: center;
}

.container-header {
  width: 100%;
  height: 8%;
  display: flex;
  flex-direction: column;
  background: #e3f0da 
}

.container-nav {
  height: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  /* x-axis */
  align-items: center;
  /* y-axis */
  font-size: 1.8em;
  background: #f2f2e2
}

li {
  list-style-type: none;
  margin: 0 15px 0 15px
}

a {
  text-decoration: none
}

img { 
  max-width: 50%;
  max-height: 50%;
}

li a {
  display: block;
  text-align: center;
}

Answer 2

问题是您没有告诉它以a标签为中心。

a{
  display:flex;
  justify-content: center;
  align-items: center;
}

https://jsfiddle.net/kvp1a530/6/