SwiftSVG 并非旨在成为一个完整的 SVG 解析器。该库支持平面、纯色 SVG 元素的最常见用例。它支持分组和转换，并且可以解析所有路径和形状元素。

SwiftSVG 的最佳用例是用于你可能希望在运行时进行主题化并能很好地控制的平面图标。想想你的应用程序的图标，特别是如果你提供浅色和深色主题。该库可以处理复杂的路径，更重要的是可以快速处理它们，因此你可以使用它来显示许多 SVG，而不仅仅是每个单独的用例。请参阅示例应用程序中的复杂示例。

目前，不支持渐变，但这是接下来要支持的功能列表中的首位。此外，目前不支持文本，但支持起来应该不会太难。动画是最后一大类尚不支持的功能，并且可能在不久的将来也不会支持，因为 Cocoa 已经提供了丰富的支持。

最后，如果你希望扩展这个项目，这是使用 SwiftSVG 的另一个好理由。我们已经投入了大量精力使代码尽可能可扩展和可维护，并且这将继续是未来更新的核心功能。Fork 这个项目，我希望你能分享你的更改。

Swift 版本	SwiftSVG 版本
Swift 5.0	v2.3.0
Swift 4.2	v2.2.1

pod 'SwiftSVG', '~> 2.0'

github "mchoe/SwiftSVG" ~> 2.0

对于当前使用 1.x 的项目：SwiftSVG 2.x 是对该库的重大重写。对于大多数用例，你应该能够升级到 2.0，而无需对你的代码进行任何更改。但是，存在一些可能影响你的项目的中断性更改。最值得注意的是，String 扩展和从 URL 解析单路径字符串的功能已弃用。

let fistBump = UIView(SVGNamed: "fistbump")     // In the main bundle
self.addSubview(fistBump)

或者你可以将 SVG 文件添加到你的 Asset Catalog。你应该像这样将其添加为 Data Asset

let cowboyHat = UIView(SVGNamed: "cowboyHat")     // In the asset catalog as a Data Asset
self.addSubview(cowboyHat)

let svgURL = URL(string: "https://openclipart.org/download/181651/manhammock.svg")!
let hammock = UIView(SVGURL: svgURL) { (svgLayer) in
    svgLayer.fillColor = UIColor(red:0.52, green:0.16, blue:0.32, alpha:1.00).cgColor
    svgLayer.resizeToFit(self.view.bounds)
}
self.view.addSubview(hammock)

convenience init(SVGNamed: String, parser: SVGParser? = nil, completion: ((SVGLayer) -> ())? = nil)
convenience init(SVGURL: URL, parser: SVGParser? = nil, completion: ((SVGLayer) -> ())? = nil)
convenience init(SVGData: Data, parser: SVGParser? = nil, completion: ((SVGLayer) -> ())? = nil)

所有这些初始化器都将解析位于主包、你自己的包或 Web 上的文件。它将异步解析文件，并可选择使用一个完成块，在解析完成后传递一个 SVGLayer。无论你是否传递完成块，SwiftSVG 都会将其添加到视图的子层。如果你想更改其中一个图层的属性，例如填充颜色或调整其大小以适合视图，你可以在完成块中执行此操作

如果你想为各种 SVG 文件重用相同的解析器，或者想使用第三方 XML 解析器来自己实现解析器，你可以选择传递一个 SVGParser 对象。默认情况下，SwiftSVG 使用 Foundation 的 XMLParser 的子类，该子类使用名为 NSXMLSVGParser 的所有受支持的元素和属性。你还可以选择设置自己的 NSXMLSVGParser，传递一个 SVGParserSupportedElements 结构，该结构将仅解析你选择的元素和属性。

还有一个用于解析单个路径字符串的便利初始化器，该初始化器同步解析

// Declaration
convenience init(pathString: String)

// Example
let triangle = UIView(pathString: "M75 0 l75 200 L0 200 Z")
self.addSubview(triangle)

如果你需要对解析后的图层进行更多控制，你可以使用其中一个 CALayer 便利初始化器。你可以对解析后的 SVG 图层进行一些更改，例如在运行时更改填充颜色，并可以将其添加到你选择的图层。如果你要降低到 CALayer 级别，则假定你需要更多控制，并且你必须提供一个完成块，并且必须将其添加到子层才能显示它。

let svgURL = Bundle.main.url(forResource: "pizza", withExtension: "svg")!
let pizza = CALayer(SVGURL: svgURL) { (svgLayer) in
    // Set the fill color
    svgLayer.fillColor = UIColor(red:0.94, green:0.37, blue:0.00, alpha:1.00).cgColor
    // Aspect fit the layer to self.view
    svgLayer.resizeToFit(self.view.bounds)
    // Add the layer to self.view's sublayers
    self.view.layer.addSublayer(svgLayer)
}

convenience init(SVGURL: URL, parser: SVGParser? = nil, completion: @escaping (SVGLayer) -> ())
convenience init(SVGData: Data, parser: SVGParser? = nil, completion: @escaping (SVGLayer) -> ())

在 UIView 和 CALayer 完成块中传递的图层是 SVGLayer 的实例，它是 CAShapeLayer 的子类。目前，SVGLayer 添加了以下功能

除了允许你解析单个 <path> d 字符串的 UIView 扩展之外，你还可以使用 CAShapeLayer 或 UIBezierPath 便利初始化器。

let sockPuppet = "M49.976,36.57l27.343,1.078c7.437,0,13.486-6.05,13.486-13.487s-6.049-13.487-13.485-13.487H58  c-0.429-3.546-2.45-6.235-4.881-6.235s-4.45,2.689-4.877,6.235h-4.368c-0.259,0-0.511,0.01-0.768,0.014  c-0.423-3.553-2.445-6.25-4.88-6.25c-2.719,0-4.924,3.36-4.961,7.523c-5.139,1.369-9.419,3.825-12.781,7.357  c-8.476,8.907-7.963,21.297-7.939,21.737v37.496h4.016V93.5h33.775V78.551h4.471v-1.682c0-8.529,4.16-9.612,4.639-9.708  c0.794-0.026,5.409-0.225,10.103-1.41c9.184-2.323,11.111-6.586,11.111-9.753c0-7.207-5.377-9.775-10.409-9.775  c-0.399,0-0.689,0.018-0.829,0.028H51.104l-0.237,0.017c-0.004,0.001-0.422,0.058-1.042,0.058c-5.218,0-5.218-3.253-5.218-4.322  C44.607,36.887,49.143,36.58,49.976,36.57z M87.441,24.161c0,5.583-4.542,10.124-10.057,10.125l-7.973-0.314  c-4.428-6.087-6.037-11.196-4.771-15.199c0.722-2.282,2.289-3.793,3.675-4.734h9.002C82.899,14.038,87.441,18.579,87.441,24.161z   M69.492,49.615l0.16-0.008c0.035-0.003,0.254-0.021,0.598-0.021c2.632,0,7.046,0.833,7.046,6.412c0,4.667-8.069,6.723-13.864,7.461  c-1.008-0.493-1.786-1.215-2.318-2.167c-1.917-3.429-0.405-8.997,0.517-11.677H69.492z M49.825,49.689  c0.655,0,1.153-0.047,1.384-0.074h9.357c-0.98,2.923-2.377,8.495-0.327,12.164c0.412,0.737,0.946,1.354,1.591,1.858  c-1.001,0.095-1.887,0.147-2.579,0.164l-0.153,0.012c-0.297,0.034-6.954,0.932-7.604,11.374H45.15v-7.053h-3.364v7.053H35.06v-7.053  h-3.363v7.053h-7.147v-7.053h-3.364v7.053h-5.277l-0.002-34.212c-0.005-0.115-0.447-11.52,7.037-19.36  c2.829-2.964,6.458-5.042,10.805-6.269c0.799,2.571,2.501,4.353,4.479,4.353c2.291,0,4.215-2.388,4.788-5.63  c0.291-0.005,0.565-0.031,0.86-0.031h22.781c-1.188,1.029-2.341,2.46-2.964,4.421c-1.327,4.175,0.18,9.371,4.46,15.462  l-18.109-0.714c-3.043,0-8.798,1.838-8.798,8.797C41.244,46.816,44.452,49.689,49.825,49.689z"
let sockPuppetSVG = CAShapeLayer(pathString: sockPuppet)
let returnView = UIView()
self.layer.addSublayer(sockPuppetSVG)

let tea = "M166.467916,125.61975 C163.212238,131.944462 153.253694,144.977204 125.484677,151.685233 C123.761082,154.368444 115.143112,162.801395 83.5438847,162.801395 C62.8607545,162.801395 52.3276789,159.351552 46.7738754,156.093366 C44.4757498,158.201604 41.9861137,159.926525 38.9219463,161.076473 L40.2625195,164.717975 C40.8370509,166.442896 39.8794986,168.359476 38.1559044,168.93445 L27.4313183,172.767609 C25.7077241,173.342583 23.7926195,172.384293 23.2180881,170.659372 L20.1539206,161.843105 C19.5793893,160.118183 20.5369416,158.201604 22.2605358,157.62663 L32.9851218,153.793471 C34.708716,153.218497 36.6238207,154.176786 37.1983521,155.901708 L38.3474149,159.159894 C41.0285614,158.201604 43.1351765,156.66834 45.0502812,154.943418 C43.326687,153.410155 42.3691346,152.260207 41.7946032,151.493575 C14.2170962,144.40223 4.83308341,130.986173 1.96042643,124.853118 C1.19438457,123.70317 0.811363636,122.553222 0.811363636,121.403274 C0.811363636,114.695246 12.1104811,109.520481 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C86.6080522,95.529449 85.8420103,94.7628172 85.8420103,93.9961853 C85.2674789,92.2712636 86.9910731,90.7379999 88.7146673,91.1213158 C89.4807092,91.3129738 90.246751,92.0796056 90.4382615,92.8462375 C91.0127929,94.5711592 89.2891987,96.1044229 87.5656045,95.721107 Z M83.9269057,80.9634436 C75.3089347,80.9634436 66.6909638,80.3884697 58.6475242,79.2385219 C58.0729928,81.7300755 57.4984614,84.413287 57.306951,87.4798145 L68.414558,124.853118 L114.56858,111.053744 L105.376078,79.8134958 C98.481701,80.5801277 91.2043033,80.9634436 83.9269057,80.9634436 Z M56.5409091,130.602857 C56.3493986,132.711094 56.1578882,134.627674 55.7748672,136.544254 C57.4984614,136.735912 59.0305451,136.735912 60.7541393,136.92757 C60.1796079,134.436016 58.6475242,132.13612 56.5409091,130.602857 Z M64.0098172,137.119228 C70.5211731,137.502543 77.2240394,137.694201 84.5014371,137.694201 C91.3958138,137.694201 97.7156592,137.502543 103.843994,137.119228 C104.418525,133.286068 106.525141,129.836225 109.972329,127.727987 C136.017752,111.053744 138.507388,81.7300755 138.507388,70.4222555 C133.336606,75.0220467 121.845978,78.2802321 108.440245,80.0051538 L110.738371,88.0547884 C113.994049,87.6714724 121.654467,86.9048406 127.399781,84.9882609 C129.314886,84.221629 131.03848,85.7548928 130.655459,87.6714724 C128.740355,96.2960809 123.952593,111.053744 111.312902,121.019958 C111.312902,121.019958 107.865714,123.128196 105.184567,126.003066 C100.013785,131.561147 92.7363871,132.711094 85.0759684,132.711094 L84.1184161,132.711094 C77.7985708,132.711094 71.6702359,131.944462 66.6909638,128.877935 L66.4994533,128.877935 L66.3079428,128.494619 C65.15888,127.727987 64.2013277,126.961355 63.2437754,126.003066 C61.7116917,124.469802 59.796587,123.128196 57.4984614,121.78659 C57.306951,121.78659 57.306951,121.594932 57.1154405,121.594932 C57.1154405,123.511512 57.1154405,125.236434 56.92393,127.153013 C57.306951,127.344671 57.4984614,127.536329 57.8814823,127.727987 C61.1371603,129.836225 63.4352858,133.286068 64.0098172,137.119228 Z M139.847962,86.5215246 C138.698899,92.8462375 136.592284,99.9375822 132.953585,106.645611 L137.358326,105.112347 C142.912129,103.195768 147.50838,99.1709504 149.614995,93.9961853 C150.955569,90.9296578 151.33859,87.8631304 150.572548,86.1382087 C150.189527,85.3715768 149.806506,84.7966029 149.040464,84.604945 C145.018744,83.2633392 140.997024,85.7548928 139.847962,86.5215246 Z M156.126351,75.9803365 C151.5301,72.5304931 144.252702,73.8720989 141.380045,74.6387308 C141.188535,77.1302843 140.997024,79.8134958 140.614003,82.6883653 C142.912129,81.5384175 146.359317,80.5801277 150.189527,81.9217335 C151.72161,82.4967074 152.870673,83.4549972 153.445205,84.9882609 C154.594267,87.4798145 154.211246,91.3129738 152.487652,95.3377911 C149.998016,101.279188 144.827234,105.878979 138.507388,108.178875 L130.655459,111.053744 C129.314886,113.161982 127.782802,115.461877 126.059208,117.570115 C149.806506,116.036851 160.722602,101.08753 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let teaPath = UIBezierPath(pathString: tea)
let returnView = UIView()
let shapeLayer = CAShapeLayer()
shapeLayer.path = teaPath.cgPath
self.layer.addSublayer(shapeLayer)

最后，SwiftSVG 提供了一个 UIView 子类，它是 IBInspectable。只需将视图添加到你的故事板，并将 SVGView 子类用作你的类名。然后将你的包中 SVG 文件的名称放在你的 IBInspectable 属性“SVGName”中

主要特性

谁应该使用 SwiftSVG

目录

安装

用法

UIView+SVG

输出

输出

输出

输出

CALayer+SVG

输出

SVGLayer

其他接口

CAShapeLayer & UIBezierPath 单路径

输出

输出

SVGView

鸣谢

许可证