从左到右绘制复选标记CSS动画

I'm trying to draw a check mark from the left going down to the right going up with CSS animations. I got the left going down part, but going back up doesn't seem to working. It goes from right to down. Does anyone know how I can make this smoother and actually look like a check being drawn?

我正试图从左边向右绘制一个复选标记,上面是CSS动画。我把左边的部分放下了,但是重新上去似乎没有用。它从右到下。有谁知道我怎么能让这个更顺畅,实际上看起来像一张支票?

setTimeout(function() {
  $('#kick').addClass('draw2');
}, 500);

#kick {
  height: 150px;
  width: 20px;
  background: green;
  -webkit-transform: rotate(45deg);
  position: relative;
  top: -24px;
  left: 273px;
}
#stem {
  height: 60px;
  width: 20px;
  background: green;
  -webkit-transform: rotate(-45deg);
  position: relative;
  top: 100px;
  left: 200px;
}
@-webkit-keyframes draw1 {
  from {
    height: 0;
  }
  to {
    height: 60px
  }
}
@-webkit-keyframes draw2 {
  from {
    height: 0;
  }
  to {
    height: 150px;
  }
}
.draw1 {
  -webkit-animation-name: draw1;
  -webkit-animation-duration: 0.5s;
}
.draw2 {
  -webkit-animation-name: draw2;
  -webkit-animation-duration: 0.5s;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="checkmark">
    <div class="draw1" id="stem"></div>
    <div id="kick"></div>
</span>

I'd greatly appreciate any help in getting this animation right! Also, since I'm using jQuery anyway, if this can be done more efficiently in jQuery/JavaScript, that's fine too.

我非常感谢你帮助我制作这个动画!另外,既然我正在使用jQuery,如果可以在jQuery / JavaScript中更有效地完成,那也没关系。

1 个解决方案

#1

Well, this is my approach using <canvas> and JavaScript.

嗯,这是我使用 和JavaScript的方法。

Demo on Fiddle -----> Square Corners | Round Corners

(Note: To change the animation speed increment or decrement the variable animationSpeed. Lower number yeilds Higher speed)

(注意:要更改动画速度增量或减少变量animationSpeed。更低的数字更高速度)

var start = 100;
var mid = 145;
var end = 250;
var width = 20;
var leftX = start;
var leftY = start;
var rightX = mid - (width / 2.7);
var rightY = mid + (width / 2.7);
var animationSpeed = 20;

var ctx = document.getElementsByTagName('canvas')[0].getContext('2d');
ctx.lineWidth = width;
ctx.strokeStyle = 'rgba(0, 150, 0, 1)';

for (i = start; i < mid; i++) {
  var drawLeft = window.setTimeout(function() {
    ctx.beginPath();
    ctx.moveTo(start, start);
    ctx.lineTo(leftX, leftY);
    ctx.stroke();
    leftX++;
    leftY++;
  }, 1 + (i * animationSpeed) / 3);
}

for (i = mid; i < end; i++) {
  var drawRight = window.setTimeout(function() {
    ctx.beginPath();
    ctx.moveTo(leftX, leftY);
    ctx.lineTo(rightX, rightY);
    ctx.stroke();
    rightX++;
    rightY--;
  }, 1 + (i * animationSpeed) / 3);
}

<canvas height="160"></canvas>

---

You could also do this using svg and CSS animation.

您也可以使用svg和CSS动画来完成此操作。

1. Square Corners:

1.方角:

#check {
  fill: none;
  stroke: green;
  stroke-width: 20;
  stroke-dasharray: 180;
  stroke-dashoffset: 180;
  -webkit-animation: draw 2s infinite ease;
  animation: draw 2s infinite ease;
}
-webkit-@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}

<svg width="150" height="150">
  <path id="check" d="M10,30 l30,50 l95,-70" />
</svg>

---

2. Round Corners:

2.圆角:

#check {
  fill: none;
  stroke: green;
  stroke-width: 20;
  stroke-linecap: round;
  stroke-dasharray: 180;
  stroke-dashoffset: 180;
  animation: draw 2s infinite ease;
}
@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}

<svg width="150" height="150">
  <path id="check" d="M10,50 l25,40 l95,-70" />
</svg>