react-native使用react-art制作SVG动画

想要使用SVG做一个动画，郁闷了一上午终于有了一点思路。。

其实我是看了一篇国外的文章。网址：http://browniefed.com/blog/2015/05/03/getting-react-art-running-on-react-native/

介绍：http://browniefed.com/blog/2015/10/14/react-native-morphing-svg-paths-with-react-art/

上面网站已经介绍的很详细啦，我就不废话了。只不过第一步，它要我们将react－native 删除，并且重新git的地方，现在新版本已经加入这个库。所以这一步就可以省略啦。

var React = require('react-native');
var ReactART = require('ReactNativeART');
var Dimensions = require('Dimensions');
var {
  width,
  height
} = Dimensions.get('window');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
} = React;
var {
  Surface,
  Shape
} = ReactART;
var Morph = require('art/morph/path');
var BatmanLogoSVGs = [
  'M 256,213 C 245,181 206,187 234,262 147,181 169,71.2 233,18   220,56   235,81   283,88   285,78.7 286,69.3 288,60   289,61.3 290,62.7 291,64   291,64   297,63   300,63   303,63   309,64   309,64   310,62.7 311,61.3 312,60   314,69.3 315,78.7 317,88   365,82   380,56   367,18   431,71   453,181 366,262 394,187 356,181 344,213 328,185 309,184 300,284 291,184 272,185 256,213 Z',
  'M 212,220 C 197,171 156,153 123,221 109,157 120,109  159,63.6 190,114  234,115  254,89.8 260,82.3 268,69.6 270,60.3 273,66.5 275,71.6 280,75.6 286,79.5 294,79.8 300,79.8 306,79.8 314,79.5 320,75.6 325,71.6 327,66.5 330,60.3 332,69.6 340,82.3 346,89.8 366,115  410,114  441,63.6 480,109  491,157 477,221 444,153 403,171 388,220 366,188 316,200 300,248 284,200 234,188 212,220 Z',
  'M 213,222 C 219,150 165,139 130,183 125,123 171,73.8 247,51.6 205,78   236,108  280,102  281,90.3 282,79   286,68.2 287,72   288,75.8 289,79.7 293,79.7 296,79.7 300,79.7 304,79.7 307,79.7 311,79.7 312,75.8 313,72   314,68.2 318,79   319,90.3 320,102  364,108  395,78   353,51.6 429,73.8 475,123 470,183 435,139 381,150 387,222 364,176 315,172 300,248 285,172 236,176 213,222 Z',
  'M 218,231 C 191,238 165,252 140,266 144,209 156,153  193,93.7 218,106  249,105  280,102  282,90.3 284,78.6 289,67.8 290,71.6 291,75.8 292,79.7 292,79.7 297,79.7 300,79.7 303,79.7 308,79.7 308,79.7 309,75.8 310,71.6 311,67.8 316,78.6 318,90.3 320,102  351,105  382,106  407,93.7 444,153  456,209 460,266 435,252 409,238 382,231 355,224 328,223 300,223 272,223 245,224 218,231 Z',
  'M 258,243 C 220,201 221,220 253,281 154,243 150,108  229,61.9 242,83   257,98.1 275,110  278,88   282,65.8 285,43.6 287,49.9 288,56.2 290,62.5 293,62.7 297,62.9 300,62.9 303,62.9 307,62.7 310,62.5 312,56.2 313,49.9 315,43.6 318,65.8 322,88   325,110  343,98.1 358,83   371,61.9 450,108  446,243 347,281 379,220 380,201 342,243 330,187 329,202 300,271 271,202 270,187 258,243 Z',
  'M 235,210 C 214,139 143,145 183,229 108,175 135,70.1 242,48.3 190,85.6 245,142  278,95.5 281,80.2 281,62.7 284,48.7 287,53.9 287,59.1 289,64.5 292,64.7 297,64.2 300,64.2 303,64.2 308,64.7 311,64.5 313,59.1 313,53.9 316,48.7 319,62.7 319,80.2 322,95.5 355,142  410,85.6 358,48.3 465,70.1 492,175 417,229 457,145 386,139 365,210 357,147 309,190 300,271 291,190 243,147 235,210 Z',
  'M 249,157 C 214,157 201,203 273,255 157,221 157,69   274,32.8 188,87.2 211,140  256,140  291,140  289,128  291,98.1 293,107  293,116  295,125  297,125  298,125  300,125  302,125  305,125  305,125  307,116  307,107  309,98.1 311,128  309,140  344,140  389,140  412,87.2 326,32.8 443,69   443,221 327,255 399,203 386,157 351,157 317,157 300,195 300,238 300,195 283,157 249,157 Z',
  'M 264,212 C 213,138 150,171 232,244 101,217 112,55.1 257,36.9 182,86.6 222,106  266,106  285,106  284,66.7 286,36.8 288,42.6 289,48.4 291,54.2 291,54.2 297,54.2 300,54.2 303,54.2 309,54.2 309,54.2 311,48.4 312,42.6 314,36.8 316,66.7 315,106  334,106  378,106  418,86.6 343,36.9 488,55.1 499,217 368,244 450,171 387,138 336,212 354,161 300,163 300,249 300,163 246,161 264,212 Z',
  'M 223,217 C 194,153 165,168 133,219 143,158 161,99.2 189,38.4 214,69.8 241,84.7 272,86.2 272,70.2 273,53.5 273,37.5 275,47.9 278,58.4 280,68.8 287,64.9 292,62.4 300,62.4 308,62.4 313,64.9 320,68.8 322,58.4 325,47.9 327,37.5 327,53.5 328,70.2 328,86.2 359,84.7 386,69.8 411,38.4 439,99.2 457,158 467,219 435,168 406,153 377,217 350,162 319,176 300,245 281,176 250,162 223,217 Z',
  'M 231,185 C 186,159 161,180 190,215 86.2,180 92.6,99.6 211,68.9 195,112 254,141 279,96.7 279,83.2 279,69.8 279,56.3 283,63.6 288,70.8 292,78.1 295,78.1 297,78.1 300,78.1 303,78.1 305,78.1 308,78.1 312,70.8 317,63.6 321,56.3 321,69.8 321,83.2 321,96.7 346,141 405,112 389,68.9 507,99.6 514,180 410,215 439,180 414,159 369,185 351,165 324,167 300,216 276,167 249,165 231,185 Z',
  'M 194,146 C 192,107 164,76.4 136,45.6 166,55.7 196,65.7 226,75.8 238,107 265,163 279,136 282,130 281,108 281,94.8 285,103 288,111 293,115 295,116 298,117 300,117 302,117 305,116 307,115 312,111 315,103 319,94.8 319,108 318,130 321,136 335,163 362,107 374,75.8 404,65.7 434,55.7 464,45.6 436,76.4 408,107 406,146 355,158 323,189 300,231 277,189 245,158 194,146 Z',
  'M 209,182 C 184,132 176,138 113,161 140,136 168,111 196,86.5 221,104 247,115 278,115 281,99.9 285,85.5 287,70.2 289,78.5 292,88.4 294,96.7 296,96.7 298,96.7 300,96.7 302,96.7 304,96.7 306,96.7 308,88.4 311,78.5 313,70.2 315,85.5 319,99.9 322,115 353,115 379,104 404,86.5 432,111 460,136 487,161 424,138 416,132 391,182 332,150 341,161 300,214 259,161 268,150 209,182 Z',
  'M 198,171 C 189,131 150,120 113,140 142,104 182,74.4 249,70.2 208,89 248,125 278,106 285,101 286,93.5 286,74.2 288,78.1 291,81.5 294,83.2 296,84.2 298,84.7 300,84.7 302,84.7 304,84.2 306,83.2 309,81.5 312,78.1 314,74.2 314,93.5 315,101 322,106 352,125 392,89 351,70.2 418,74.4 458,104 487,140 450,120 411,131 402,171 357,147 322,171 300,214 278,171 243,147 198,171 Z',
  'M 202,170 C 188,115 157,108 124,105 146,84.3 171,71.5 199,70.2 211,98.6 243,103 277,106 279,99.3 281,92.6 283,86 285,91.9 287,97.9 290,104 293,104 297,104 300,104 303,104 307,104 310,104 313,97.9 315,91.9 317,86 319,92.6 321,99.3 323,106 357,103 389,98.6 401,70.2 429,71.5 454,84.3 476,105 443,108 412,115 398,170 349,157 318,175 300,214 282,175 251,157 202,170 Z',
  'M 220,179 C 200,127 150,130 123,175 122,110 160,85.1 201,64 208,99.2 243,111 268,92.9 278,86.1 284,68.2 287,40.7 289,49.6 292,58.4 294,67.3 296,67.3 298,67.3 300,67.3 302,67.3 304,67.3 306,67.3 308,58.4 311,49.6 313,40.7 316,68.2 322,86.1 332,92.9 357,111 392,99.3 399,64 440,85.1 478,110 477,175 450,130 400,127 380,179 355,155 305,208 300,247 295,208 245,155 220,179 Z',
  'M 166,154 C 179,119 154,95.4 114,79.3 155,79.1 197,78.9 239,78.7 242,103 250,109 283,109 289,109 290,93.9 291,83.7 292,88.3 292,92.9 293,97.5 295,97.5 298,97.5 300,97.5 302,97.5 305,97.5 307,97.5 308,92.9 308,88.3 309,83.7 310,93.9 311,109 317,109 350,109 358,103 361,78.7 403,78.9 445,79.1 486,79.3 446,95.4 421,119 434,154 377,151 320,151 300,207 280,151 223,151 166,154 Z'
];
var BatmanLogoPaths = BatmanLogoSVGs.map((svg) => Morph.Path(svg));
var square = Morph.Path()
  .move(100,0)
  .line(100,0)
  .line(0,100)
  .line(-100,0)
  .close();
BatmanLogoPaths.push(square);
var Demo = React.createClass({
  getInitialState: function() {
    return {
      transition: Morph.Tween(BatmanLogoPaths[0], BatmanLogoPaths[1])
    };
  },
  componentWillMount: function() {
    this._current = 1;
  },
  componentDidMount: function() {
    this.animate(null, this.nextAnimation)
  },
  nextAnimation: function() {
    this._current += 1;
    if (this._current >= BatmanLogoPaths.length) return;
    this.setState({
      transition: Morph.Tween(BatmanLogoPaths[this._current - 1], BatmanLogoPaths[this._current])
    }, () => this.animate(null, this.nextAnimation))
  },
  animate: function(start, cb) {
    requestAnimationFrame((timestamp) => {
      if (!start) start = timestamp;
      var delta = (timestamp - start) / 1000;
      if (delta > 1) return cb();
      this.state.transition.tween(delta);
      this.setState(this.state);
      this.animate(start, cb);
    })
  },
  render: function() {
    return (
      <View style={styles.container}>
        <Surface width={400} height={400}>
          <Shape x={-100} y={100} d={this.state.transition} fill="#000" />
        </Surface>
      </View>
    );
  }
});
var styles = StyleSheet.create({
  container: {
    flex: 1
  },
});

module.exports = Demo;

---

/**
 * Copyright 2013 Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
"use strict";
var React = require('react-native');
var ReactART = require('ReactNativeART');
var {
    Art,
    TouchableWithoutFeedback,
    View,
    Text
} = React;
var {
    Group,
    Shape,
    Surface,
    Transform
} = ReactART;
var MOUSE_UP_DRAG = 0.978;
var MOUSE_DOWN_DRAG = 0.9;
var MAX_VEL = 11;
var CLICK_ACCEL = 3;
var BASE_VEL = 0.15;
/**
 * An animated SVG component.
 */
var VectorWidget = React.createClass({
  /**
   * Initialize state members.
   */
  getInitialState: function() {
    return {degrees: 0, velocity: 0, drag: MOUSE_UP_DRAG};
  },
  /**
   * When the component is mounted into the document - this is similar to a
   * constructor, but invoked when the instance is actually mounted into the
   * document. Here's, we'll just set up an animation loop that invokes our
   * method. Binding of `this.onTick` is not needed because all React methods
   * are automatically bound before being mounted.
   */
  componentDidMount: function() {
    this._interval = window.setInterval(this.onTick, 20);
  },
  componentWillUnmount: function() {
    window.clearInterval(this._interval);
  },
  onTick: function() {
    var nextDegrees = this.state.degrees + BASE_VEL + this.state.velocity;
    var nextVelocity = this.state.velocity * this.state.drag;
    this.setState({degrees: nextDegrees, velocity: nextVelocity});
  },
  /**
   * This is the "main" method for any component. The React API allows you to
   * describe the structure of your UI component at *any* point in time.
   */
  render: function() {
    return (
        <Surface
          width={700}
          height={700}
        >
          {this.renderGraphic(this.state.degrees)}
        </Surface>
    );
  },
  /**
   * Better SVG support for React coming soon.
   */
  renderGraphic: function(rotation) {
    return (
      <Group>
        <Group x={210} y={50}>
          <Shape fill="rgba(0,0,0,0.1)" d={BORDER_PATH} />
          <Shape fill="#7BC7BA" d={BG_PATH} />
          <Shape fill="#DCDCDC" d={BAR_PATH} />
          <Shape fill="#D97B76" d={RED_DOT_PATH} />
          <Shape fill="#DBBB79" d={YELLOW_DOT_PATH} />
          <Shape fill="#A6BD8A" d={GREEN_DOT_PATH} />
          <Group x={55} y={29}>
            <Group rotation={rotation} originX={84} originY={89}>
              <Shape fill="#FFFFFF" d={CENTER_DOT_PATH} />
              <Group>
                <Shape d={RING_ONE_PATH} stroke="#FFFFFF" strokeWidth={8} />
                <Shape d={RING_TWO_PATH} transform={RING_TWO_ROTATE} stroke="#FFFFFF" strokeWidth={8} />
                <Shape d={RING_THREE_PATH} transform={RING_THREE_ROTATE} stroke="#FFFFFF" strokeWidth={8} />
              </Group>
            </Group>
          </Group>
        </Group>
      </Group>
    );
  }
});
var BORDER_PATH = "M3.00191459,4 C1.34400294,4 0,5.34785514 0,7.00550479 L0,220.994495 C0,222.65439 1.34239483,224 3.00191459,224 L276.998085,224 C278.655997,224 280,222.652145 280,220.994495 L280,7.00550479 C280,5.34561033 278.657605,4 276.998085,4 L3.00191459,4 Z M3.00191459,4";
var BG_PATH = "M3.00191459,1 C1.34400294,1 0,2.34785514 0,4.00550479 L0,217.994495 C0,219.65439 1.34239483,221 3.00191459,221 L276.998085,221 C278.655997,221 280,219.652145 280,217.994495 L280,4.00550479 C280,2.34561033 278.657605,1 276.998085,1 L3.00191459,1 Z M3.00191459,1";
var BAR_PATH = "M3.00191459,0 C1.34400294,0 0,1.34559019 0,3.00878799 L0,21 C0,21 0,21 0,21 L280,21 C280,21 280,21 280,21 L280,3.00878799 C280,1.34708027 278.657605,0 276.998085,0 L3.00191459,0 Z M3.00191459,0";
var RED_DOT_PATH = "M12.5,17 C16.0898511,17 19,14.0898511 19,10.5 C19,6.91014895 16.0898511,4 12.5,4 C8.91014895,4 6,6.91014895 6,10.5 C6,14.0898511 8.91014895,17 12.5,17 Z M12.5,17";
var YELLOW_DOT_PATH = "M31.5,17 C35.0898511,17 38,14.0898511 38,10.5 C38,6.91014895 35.0898511,4 31.5,4 C27.9101489,4 25,6.91014895 25,10.5 C25,14.0898511 27.9101489,17 31.5,17 Z M31.5,17";
var GREEN_DOT_PATH = "M50.5,17 C54.0898511,17 57,14.0898511 57,10.5 C57,6.91014895 54.0898511,4 50.5,4 C46.9101489,4 44,6.91014895 44,10.5 C44,14.0898511 46.9101489,17 50.5,17 Z M50.5,17";
var CENTER_DOT_PATH = "M84,105 C92.8365564,105 100,97.8365564 100,89 C100,80.1634436 92.8365564,73 84,73 C75.1634436,73 68,80.1634436 68,89 C68,97.8365564 75.1634436,105 84,105 Z M84,105";
var RING_ONE_PATH = "M84,121 C130.391921,121 168,106.673113 168,89 C168,71.3268871 130.391921,57 84,57 C37.6080787,57 0,71.3268871 0,89 C0,106.673113 37.6080787,121 84,121 Z M84,121";
var RING_TWO_PATH = "M84,121 C130.391921,121 168,106.673113 168,89 C168,71.3268871 130.391921,57 84,57 C37.6080787,57 0,71.3268871 0,89 C0,106.673113 37.6080787,121 84,121 Z M84,121";
var RING_THREE_PATH = "M84,121 C130.391921,121 168,106.673113 168,89 C168,71.3268871 130.391921,57 84,57 C37.6080787,57 0,71.3268871 0,89 C0,106.673113 37.6080787,121 84,121 Z M84,121";
var RING_TWO_ROTATE = new Transform().translate(84.000000, 89.000000).rotate(-240.000000).translate(-84.000000, -89.000000);
var RING_THREE_ROTATE = new Transform().translate(84.000000, 89.000000).rotate(-300.000000).translate(-84.000000, -89.000000);
module.exports = VectorWidget;

---

'use strict';
var React = require('react-native');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  Image,
  TouchableOpacity
} = React;
var VectorWidget = require('./VectorWidget');
var Demo = require('./Demo');
var react_art_demo = React.createClass({
  render: function() {
    return (
      <View style={styles.container}>
        <View style={{backgroundColor: 'yellow',opacity: 1}}>
          <Demo/>
        </View>
        <TouchableOpacity>
          <VectorWidget/>
        </TouchableOpacity>
      </View>
    );
  }
});
var styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    backgroundColor: 'green'
    //opacity: 0.2
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    color: '#333333',
    marginBottom: 5,
    marginTop: 100
  },
});
AppRegistry.registerComponent('react_art_demo', () => react_art_demo);

  // <Image source={require('./zyq.png')} style={{width: 700}}>
  //         <VectorWidget style={styles.vector}/>
  //       </Image>