{"id":561,"date":"2023-02-25T19:06:20","date_gmt":"2023-02-25T11:06:20","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=561"},"modified":"2023-04-29T20:35:50","modified_gmt":"2023-04-29T12:35:50","slug":"swift-custom-function-rule-description","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/25\/swift-custom-function-rule-description\/","title":{"rendered":"Swift &#8211; \u81ea\u5b9a\u4e49\u51fd\u6570\u89c4\u5219\u8bf4\u660e"},"content":{"rendered":"<blockquote>\n<p>\u6ce8\uff1a\u4ee3\u7801\u5df2\u5347\u7ea7\u81f3Swift4<\/p>\n<\/blockquote>\n<h3>\u65e0\u8fd4\u56de\u503c\u7684\u51fd\u6570<\/h3>\n<pre><code class=\"language-swift\">func test(name:String) {\n\n}<\/code><\/pre>\n<p><!-- more --><\/p>\n<h3>\u8fd4\u56de\u4e00\u4e2a\u8fd4\u56de\u503c<\/h3>\n<pre><code class=\"language-swift\">func test(name:String) -&gt; Bool {\n    return true\n}<\/code><\/pre>\n<h3>\u8fd4\u56de\u7531\u591a\u4e2a\u503c\u7ec4\u6210\u7684\u590d\u5408\u8fd4\u56de\u503c<\/h3>\n<pre><code class=\"language-swift\">func test(name:String) -&gt; (Int,Bool) {\n    let position = 1\n    let visible = false\n    return (position, visible)\n}<\/code><\/pre>\n<h3>\u53ef\u53d8\u5f62\u53c2<\/h3>\n<p>\u53ef\u4ee5\u63a5\u53d70\u4e2a\u6216\u8005\u4efb\u610f\u6570\u91cf\u7684\u8f93\u5165\u53c2\u6570<\/p>\n<pre><code class=\"language-swift\">func test(numbers:Int...) -&gt; Int {\n    var count:Int = 0\n    for number in numbers {\n        count += number\n    }\n    return count\n}<\/code><\/pre>\n<h3>\u6539\u53d8\u5b9e\u53c2\u503c<\/h3>\n<p>\u5982\u679c\u60f3\u8981\u540c\u65f6\u6539\u53d8\u51fd\u6570\u5185\u5916\u7684\u53c2\u6570\u503c\uff0c\u53ef\u4ee5\u5229\u7528inout\u5173\u952e\u5b57\uff0c\u540c\u65f6\u8c03\u7528\u51fd\u6570\u7684\u65f6\u5019\u7ed9\u53c2\u6570\u52a0\u4e0a\u524d\u7f00\u201c&amp;\u201d<\/p>\n<pre><code class=\"language-swift\">func add(age:inout Int) {\n    age += 1\n}\n\nvar age = 22\nadd(age: &amp;age)\nprint(age)  \/\/23<\/code><\/pre>\n<h3>\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570\u7c7b\u578b\u7684\u53c2\u6570<\/h3>\n<pre><code class=\"language-swift\">func additive(a:Int, b:Int) -&gt; Int {\n    return a + b\n}\n\n\/\/\u51fd\u6570\u7c7b\u578b\u7684\u53c2\u6570\nfunc printAdditiveResult(addFun: (Int, Int) -&gt; Int, a:Int, b:Int) {\n    print(&quot;Result:\\(addFun(a,b))&quot;)\n}\n\nprintAdditiveResult(addFun: additive, a: 5, b: 7)<\/code><\/pre>\n<h3>\u4e5f\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570\u7c7b\u578b\u7684\u8fd4\u56de\u503c<\/h3>\n<pre><code class=\"language-swift\">\/\/\u5b9a\u4e49\u4e2a\u81ea\u589e\u51fd\u6570\nfunc increase(input:Int) -&gt; Int {\n    return input + 1\n}\n\n\/\/\u5b9a\u4e49\u4e2a\u81ea\u51cf\u51fd\u6570\nfunc reduce(input:Int) -&gt; Int {\n    return input - 1\n}\n\n\/\/\u5b9a\u4e49\u4e00\u4e2a\u8fd4\u56de\u51fd\u6570\u7c7b\u578b\u7684\u51fd\u6570\nfunc chooseFunction(backwards:Bool) -&gt; (Int) -&gt; Int {\n    return backwards ? reduce : increase\n}\n\n\/\/\u6d4b\u8bd5\nlet aFun = chooseFunction(backwards: 3&gt;2)\nprint(aFun(3))  \/\/2<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6ce8\uff1a\u4ee3\u7801\u5df2\u5347\u7ea7\u81f3Swift4 \u65e0\u8fd4\u56de\u503c\u7684\u51fd\u6570 func test(name:String) { } \u8fd4\u56de\u4e00\u4e2a\u8fd4 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[171],"tags":[],"class_list":["post-561","post","type-post","status-publish","format-standard","hentry","category-swift"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=561"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/561\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}