Question

我正在尝试使用@keyframes为背景交换设置动画。背景是径向渐变。背景发生变化，但没有动画。

LONG_PRESS_MILLIS

#mydiv {
background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);
width: 100%;
height: 1246px;
position: relative;
overflow: hidden;
animation: background-gradient 5s;
animation-iteration-count: infinite;
backface-visibility: hidden;
animation-timing-function: ease-in-out;
}

@-webkit-keyframes background-gradient {
0% {background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);}
25% {background: radial-gradient(circle at 90% 80%, #993399, #4d0019);}
50% {background: radial-gradient(circle at 90% 80%, #3333cc, #4d0019);}
75% {background: radial-gradient(circle at 90% 80%, #00ffcc, #4d0019);}
100% {background: radial-gradient(circle at 90% 80%, #cc9900, #4d0019);}
}

@keyframes background-gradient {
0% {background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);}
25% {background: radial-gradient(circle at 90% 80%, #993399, #4d0019);}
50% {background: radial-gradient(circle at 90% 80%, #3333cc, #4d0019);}
75% {background: radial-gradient(circle at 90% 80%, #00ffcc, #4d0019);}
100% {background: radial-gradient(circle at 90% 80%, #cc9900, #4d0019);}
}

我尝试使用纯色并且效果很好（例如，背景：红色，背景：黄色...）。

我尝试了背景图片，而不是仅在渐变上使用背景图片，这无济于事。

您是否有任何建议或知道解决方案如何对交换动画进行动画处理，因此，这不仅是快速交换颜色，而且是一种颜色到另一种颜色的逐渐交换。

Answer 1

不幸的是，背景渐变无法设置动画

幸运的是，由于外部颜色是恒定的，因此您当前的设计不需要设置渐变动画。

只需使渐变透明，并在下面设置稳定的变化颜色

#mydiv {
  width: 100%;
  height: 600px;
  position: relative;
  overflow: hidden;
  animation: background-gradient 5s;
  animation-iteration-count: infinite;
  backface-visibility: hidden;
  animation-timing-function: ease-in-out;
  background-image: radial-gradient(circle at 90% 80%, transparent, #4d0019);
}

@keyframes background-gradient {
  0% {
    background-color: #ff0000;
  }
  25% {
    background-color: yellow;
  }
  50% {
    background-color: #3333cc;
  }
  75% {
    background-color: #00ffcc;
  }
  100% {
    background-color: #cc9900;
  }
}

<div id="mydiv"></div>

Answer 2

您犯了一个小错误。

此：

animation: "background-gradient" 50s;

应该是：

animation: background-gradient 50s;

这是一个片段：

#mydiv {
background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);
width: 100%;
height: 1246px;
position: relative;
overflow: hidden;
animation: background-gradient 50s;
animation-iteration-count: infinite;
backface-visibility: hidden;
animation-timing-function: ease-in-out;
}

@-webkit-keyframes background-gradient {
0% {background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);}
25% {background: radial-gradient(circle at 90% 80%, #993399, #4d0019);}
50% {background: radial-gradient(circle at 90% 80%, #3333cc, #4d0019);}
75% {background: radial-gradient(circle at 90% 80%, #00ffcc, #4d0019);}
100% {background: radial-gradient(circle at 90% 80%, #cc9900, #4d0019);}
}

@keyframes background-gradient {
0% {background: radial-gradient(circle at 90% 80%, #ff0000, #4d0019);}
25% {background: radial-gradient(circle at 90% 80%, #993399, #4d0019);}
50% {background: radial-gradient(circle at 90% 80%, #3333cc, #4d0019);}
75% {background: radial-gradient(circle at 90% 80%, #00ffcc, #4d0019);}
100% {background: radial-gradient(circle at 90% 80%, #cc9900, #4d0019);}
}

<div id="mydiv">

关键帧-渐变背景未设置动画

2 个答案: