{"id":3177,"date":"2021-06-11T16:37:43","date_gmt":"2021-06-11T08:37:43","guid":{"rendered":"http:\/\/123.57.164.21\/?p=3177"},"modified":"2021-06-11T16:37:43","modified_gmt":"2021-06-11T08:37:43","slug":"swift-%e8%ae%a1%e7%ae%97%e4%b8%89%e8%a7%92%e5%bd%a2%e8%a7%92%e5%ba%a6%e3%80%81%e4%b8%a4%e6%9d%a1%e8%be%b9%e5%a4%b9%e8%a7%92","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=3177","title":{"rendered":"Swift \u8ba1\u7b97\u4e09\u89d2\u5f62\u89d2\u5ea6\u3001\u4e24\u6761\u8fb9\u5939\u89d2"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/06\/image-43.png\" alt=\"\" class=\"wp-image-3178\" width=\"487\" height=\"336\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-43.png 676w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-43-300x207.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-43-230x159.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-43-350x241.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-43-480x331.png 480w\" sizes=\"(max-width: 487px) 100vw, 487px\" \/><\/figure><\/div>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/\/ \u8ba1\u7b97\u4e09\u70b9\u4e4b\u95f4\u7684\u89d2\u5ea6\n    \/\/\/\n    \/\/\/ - Parameters:\n    \/\/\/   - p1: \u70b91\n    \/\/\/   - p2: \u70b92\uff08\u4e5f\u662f\u89d2\u5ea6\u6240\u5728\u70b9\uff09\n    \/\/\/   - p3: \u70b93\n    \/\/\/ - Returns: \u89d2\u5ea6\uff08180\u5ea6\u5236\uff09\n    func getAnglesWithThreePoints(p1:CGPoint,p2:CGPoint,p3:CGPoint) -> Double {\n        \/\/\u6392\u9664\u7279\u6b8a\u60c5\u51b5\uff0c\u4e09\u4e2a\u70b9\u4e00\u6761\u7ebf\n        if (p1.x == p2.x &amp;&amp; p2.x == p3.x) || ( p1.y == p2.x &amp;&amp; p2.x == p3.x){\n            return 0\n        }\n        \n        let a = fabs(p1.x - p2.x)\n        let b = fabs(p1.y - p2.y)\n        let c = fabs(p3.x - p2.x)\n        let d = fabs(p3.y - p2.y)\n        \n        if (a &lt; 1.0 &amp;&amp; b &lt; 1.0) || (c &lt; 1.0 &amp;&amp; d &lt; 1.0){\n            return 0\n        }\n        let e = a*c+b*d\n        let f = sqrt(a*a+b*b)\n        let g = sqrt(c*c+d*d)\n        let r = Double(acos(e\/(f*g)))\n        return r        \/\/\u5f27\u5ea6\u503c\n        \n\/\/        return (180*r\/Double.pi)      \/\/\u89d2\u5ea6\u503c\n\n    }<\/pre>\n\n\n\n<p>P2\u4f4d\u7f6e\u5c31\u662f\u8981\u8ba1\u7b97\u7684\u89d2\u5ea6\u3002\u00a0<\/p>\n\n\n\n<p>ps\uff1a\u8fd9\u4e2a\u5750\u6807\u70b9\u662f\u57fa\u4e8eiOS\u4e0a\u7684\uff0c\u5de6\u4e0a\u89d2\u4e3a\u539f\u70b9\uff0c\u6240\u4ee5\u76f4\u63a5\u83b7\u53d6\u70b9\u5373\u53ef\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/06\/image-44.png\" alt=\"\" class=\"wp-image-3179\" width=\"318\" height=\"259\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-44.png 344w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-44-300x244.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-44-230x187.png 230w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>P2\u4f4d\u7f6e\u5c31\u662f\u8981\u8ba1\u7b97\u7684\u89d2\u5ea6\u3002\u00a0 ps\uff1a\u8fd9\u4e2a\u5750\u6807\u70b9\u662f\u57fa\u4e8eiOS\u4e0a\u7684\uff0c\u5de6\u4e0a\u89d2\u4e3a\u539f\u70b9\uff0c\u6240\u4ee5\u76f4\u63a5\u83b7\u53d6\u70b9\u5373\u53ef\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,8],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3177"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3177"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3177\/revisions"}],"predecessor-version":[{"id":3180,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3177\/revisions\/3180"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}