{"id":3748,"date":"2014-03-30T05:09:00","date_gmt":"2014-03-30T05:09:00","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/how-do-i-get-list-of-all-classes-conform-to-certain-protocol-in-xcode-4-collection-of-common-programming-errors\/"},"modified":"2014-03-30T05:09:00","modified_gmt":"2014-03-30T05:09:00","slug":"how-do-i-get-list-of-all-classes-conform-to-certain-protocol-in-xcode-4-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/how-do-i-get-list-of-all-classes-conform-to-certain-protocol-in-xcode-4-collection-of-common-programming-errors\/","title":{"rendered":"How do I get list of all classes conform to certain protocol in XCode 4?-Collection of common programming errors"},"content":{"rendered":"<pre><code>Protocol *protocol = @protocol(YourProtocol);\n\nint numberOfClasses = objc_getClassList(NULL, 0);\nClass *classList = malloc(numberOfClasses * sizeof(Class));\nnumberOfClasses = objc_getClassList(classList, numberOfClasses);\n\nfor (int idx = 0; idx &lt; numberOfClasses; idx++) \n{\n    Class class = classList[idx];\n    if (class_getClassMethod(class, @selector(conformsToProtocol:)) &amp;&amp; [class conformsToProtocol:protocol])\n    {\n        NSLog(@\"%@\", NSStringFromClass(class));\n    }\n}\nfree(classList);\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Protocol *protocol = @protocol(YourProtocol); int numberOfClasses = objc_getClassList(NULL, 0); Class *classList = malloc(numberOfClasses * sizeof(Class)); numberOfClasses = objc_getClassList(classList, numberOfClasses); for (int idx = 0; idx &lt; numberOfClasses; idx++) { Class class = classList[idx]; if (class_getClassMethod(class, @selector(conformsToProtocol:)) &amp;&amp; [class conformsToProtocol:protocol]) { NSLog(@&#8221;%@&#8221;, NSStringFromClass(class)); } } free(classList);<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3748","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3748"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3748\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}