通过css3动画实现三种loading加载动画
效果1：通过css3的border-radius与transform的rotate()实现
效果2：通过css3动画animation的animation-delay为负值，则直接从该时间状态进行动画的功能来实现
效果3：通过伪元素::bofore与::after,当animation过渡动画类型为ease时border重叠效果实现
body {
margin: 0px;
/*background: black;*/
}
.loading {
width: 100px;
height: 100px;
margin: 50px auto;
border: 8px solid #333;
border-left: 8px solid red;
border-radius: 100px;
-moz-animation: 2s loadings linear infinite;
-webkit-animation: 2s loadings linear infinite;
-ms-animation: 2s loading linear infinite;
animation: 2s loadings linear infinite;
}
@-webkit-keyframes loadings {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
@-moz-keyframes loadings {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
@-ms-keyframes loadings {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
@keyframes loadings {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
.loading1 {
margin: 0 auto;
text-align: center;
font-size: 0;
}
.loading1 .item {
display: inline-block;
margin-right: 5px;
width: 5px;
height: 45px;
background-color: #000;
}
.loading1 .loading-item1 {
-moz-animation: loading-animation 1.2s ease infinite;
-webkit-animation: loading-animation 1.2s ease infinite;
animation: loading-animation 1.2s ease infinite;
}
.loading1 .loading-item2 {
-moz-animation: loading-animation 1.2s ease -1.1s infinite;
-webkit-animation: loading-animation 1.2s ease -1.1s infinite;
animation: loading-animation 1.2s ease -1.1s infinite;
}
.loading1 .loading-item3 {
-moz-animation: loading-animation 1.2s ease -1.0s infinite;
-webkit-animation: loading-animation 1.2s ease -1.0s infinite;
animation: loading-animation 1.2s ease -1.0s infinite;
}
.loading1 .loading-item4 {
-moz-animation: loading-animation 1.2s ease -0.9s infinite;
-webkit-animation: loading-animation 1.2s ease -0.9s infinite;
animation: loading-animation 1.2s ease -0.9s infinite;
}
.loading1 .loading-item5 {
-moz-animation: loading-animation 1.2s ease -0.8s infinite;
-webkit-animation: loading-animation 1.2s ease -0.8s infinite;
animation: loading-animation 1.2s ease -0.8s infinite;
}
@-webkit-keyframes loading-animation {
0%,
40%,
100%{
-webkit-transform: scaleY(0.5);
}
20% {
-webkit-transform: scaleY(1);
}
}
@-moz-keyframes loading-animation {
0%,
40%,
100%{
-moz-transform: scaleY(0.5);
}
20% {
-moz-transform: scaleY(1);
}
}
@-ms-keyframes loading-animation {
0%,
40%,
100%{
-ms-transform: scaleY(0.5);
}
20% {
-ms-transform: scaleY(1);
}
}
@keyframes loading-animation {
0%,
40%,
100%{
transform: scaleY(0.5);
}
20% {
transform: scaleY(1);
}
}
.loading3 {
position: relative;
margin: 0 auto;
width: 100px;
height: 100px;
border: 5px solid red;
border-radius: 50%;
}
.loading3::before {
content: "";
position: absolute;
display: inline-block;
top: -5px;
left: -5px;
width: 50px;
height: 100px;
border-radius: 150px 0 0 150px;
border-left: 5px solid black;
border-bottom: 5px solid black;
border-top: 5px solid black;
-webkit-transform-origin: 60px 60px;
-moz-transform-origin: 60px 60px;
-ms-transform-origin: 60px 60px;
transform-origin: 55px 55px;
-webkit-animation: loading3 4s ease infinite -3s;
-moz-animation: loading3 4s ease infinite -3s;
-ms-animation: loading3 4s ease infinite -3s;
animation: loading3 4s ease infinite -3s;
}
.loading3::after {
content: "";
position: absolute;
display: inline-block;
top: -5px;
left: 50px;
width: 50px;
height: 100px;
border-radius: 0 150px 150px 0;
border-top: 5px solid black;
border-right: 5px solid black;
border-bottom: 5px solid black;
-webkit-transform-origin: 0;
-moz-transform-origin: 0;
-ms-transform-origin: 0;
transform-origin: 0;
-webkit-animation: loading3 4s ease infinite;
-moz-animation: loading3 4s ease infinite;
-ms-animation: loading3 4s ease infinite;
animation: loading3 4s ease infinite;
}
@-webkit-keyframes loading3 {
0%{
-webkit-transform: rotate(0);
}
100% {
-webkit-transform: rotate(360deg);
}
}
@-moz-keyframes loading3 {
0%{
-moz-transform: rotate(0);
}
100% {
-moz-transform: rotate(360deg);
}
}
@-ms-keyframes loading3 {
0%{
-ms-transform: rotate(0);
}
100% {
-ms-transform: rotate(360deg);
}
}
@keyframes loading3 {
0%{
transform: rotate(0);
}
100% {
transform: rotate(360deg);
}
}
