jquery - 响应式 header 中 CSS 背景转换的问题

Question

我正在尝试让标题在为 my site 制作的滚动条上变小.它工作得很好，但尽管 CSS 中包含转换，标题中的图像只有在小标题转换为大标题时(向上滚动)才会平滑转换，反之亦然。现在看起来有点神经质/故障。

这是我的图像 CSS:

标志:

.Logo.small:hover {
    background: url("images/Logo.png") no-repeat;
    background-size: contain;
    position: absolute;
    top: 8px;
    width: 40px;
    height: 40px;
    z-index: 73;
    -webkit-transition: background-image .5s;
          -webkit-transition: height 0.6s;
    -moz-transition: height 0.6s;
    transition: height 0.6s;
          -webkit-transition: width 0.6s;
    -moz-transition: width 0.6s;
    transition: width 0.6s;
}
.Logo:hover {
  background: url("images/LogoHover.png") no-repeat;
  background-size: contain;
  position: absolute;
  top: 8px;
  width: 81px;
  height: 85px;
  z-index: 70;
  -webkit-transition: background-image .5s;
}
.Logo {
    background: url("images/Logo.png") no-repeat;
    background-size: contain;
    position: absolute;
    top: 8px;
    width: 81px;
    height: 85px;
    z-index: 73;
    -webkit-transition: background-image .5s;
    -webkit-transition: width .5s;
    -webkit-transition: height .5s;
}
.Logo.small {
    background: url("images/Logo.png") no-repeat;
    background-size: contain;
    position: absolute;
    top: 8px;
    width: 40px;
    height: 40px;
    z-index: 73;
    -webkit-transition: background-image .5s;
    -webkit-transition: width .5s;
    -webkit-transition: height .5s;
}

社交图标 1:

.Icon_BG1 {
  background: url("images/IconBG.png") no-repeat;
    background-size: contain;
  position: absolute;
  margin-left: 905px;
  top: 26px;
  width: 45px;
  height: 48px;
  z-index: 80;
  -webkit-transition: background-image .5s;
    -webkit-transition: width .5s;
  -webkit-transition: height .5s;
}
.Icon_BG1.small {
  background: url("images/IconBG.png") no-repeat;
  position: absolute;
  margin-left: 905px;
  top: 10px;
  background-size: contain;
  width: 35px;
  height: 35px;
  z-index: 80;
  -webkit-transition: background-image .5s;
  -webkit-transition: width .5s;
  -webkit-transition: height .5s;
}
.Icon_BG1.small:hover {
  background: url("images/IconBGHover.png") no-repeat;
  position: absolute;
  margin-left: 905px;
  top: 10px;
  background-size: contain;
  width: 35px;
  height: 35px;
  z-index: 80;
  -webkit-transition: background-image .5s;

}
.Icon_BG1:hover {
  background: url("images/IconBGHover.png") no-repeat;
  position: absolute;
  margin-left:905px;
  top: 26px;
  width: 45px;
  height: 48px;
  z-index: 80;
  -webkit-transition: background-image .5s;
}

社交图标 2:

.Icon_BG_2 {
  background: url("images/IconBG2.png") no-repeat;
  background-size: contain;
  position: absolute;
  margin-left: 960px;
  top: 26px;
  width: 45px;
  height: 48px;
  z-index: 82;
  -webkit-transition: background-image .5s;
    -webkit-transition: width .5s;
  -webkit-transition: height .5s;
}
.Icon_BG_2.small {
  background: url("images/IconBG2.png") no-repeat;
  background-size: contain;
  position: absolute;
  margin-left: 960px;
  top: 10px;
  width: 35px;
  height: 35px;
  z-index: 82;
  -webkit-transition: background-image .5s;
    -webkit-transition: width .5s;
  -webkit-transition: height .5s;
}
.Icon_BG_2.small:hover {
  background: url("images/IconBGHover2.png") no-repeat;
  background-size: contain;
  position: absolute;
  margin-left: 960px;
  top: 10px;
  width: 35px;
  height: 35px;
  z-index: 82;
  -webkit-transition: background-image .5s;
}
.Icon_BG_2:hover {
  background: url("images/IconBGHover2.png") no-repeat;
  position: absolute;
  margin-left:960x;
  top: 26px;
  width: 45px;
  height: 48px;
  z-index: 82;
  -webkit-transition: background-image .5s;
}

Answer 1

这是因为您正在使用 background-size 来调整图像大小而不是 transform

使用

transform: scale(xx);

调整大小