{"id":120,"date":"2019-02-06T21:44:00","date_gmt":"2019-02-06T21:44:00","guid":{"rendered":"https:\/\/seimith.io\/?p=120"},"modified":"2024-07-20T00:18:59","modified_gmt":"2024-07-20T00:18:59","slug":"swift-creating-a-custom-delegate","status":"publish","type":"post","link":"https:\/\/seimith.io\/pt\/2019\/02\/06\/swift-creating-a-custom-delegate\/","title":{"rendered":"(Swift) Creating a Custom Delegate"},"content":{"rendered":"<p>Exposing a function from&nbsp;<strong>UIViewController A<\/strong>&nbsp;to a&nbsp;<strong>CUSTOM UIVIEW<\/strong>&nbsp;such that you can call it.<\/p>\n\n\n\n<p><strong>CUSTOM UIVIEW<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import UIKit\nimport DesignSystem\n\nprotocol CustomViewDelegate: class {\n    \/\/ make this class protocol so you can create `weak` reference\n    func triggerSegueToGallery()\n}\n\nclass AttachmentBar: UIView {\n     weak var delegate: CustomViewDelegate?   \/\/ make this `weak` to avoid strong reference cycle b\/w view controller and its views\n     func triggerSegueToGallery() {\n        delegate?.triggerSegueToGallery()\n    }\n\n     func someOtherFunc () {\n       item.addTarget(self, action: #selector(triggerSegueToGallery), for: .touchUpInside)\n     }\n}<\/code><\/pre>\n\n\n\n<p><strong>UIViewController A<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import UIKit\nimport DesignSystem\n\nclass PublisherViewController: UIViewController, CustomViewDelegate {\n    func triggerSegueToGallery() {\n        self.performSegue(withIdentifier: \"arbitraryIDForCollectionView\", sender: self)\n    }\n}<\/code><\/pre>","protected":false},"excerpt":{"rendered":"<p>Exposing a function from&nbsp;UIViewController A&nbsp;to a&nbsp;CUSTOM UIVIEW&nbsp;such that you can call it. CUSTOM UIVIEW UIViewController A<\/p>","protected":false},"author":1,"featured_media":288,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[20],"class_list":["post-120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-post","tag-code"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>(Swift) Creating a Custom Delegate - S(ei)mith.io<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/seimith.io\/pt\/2019\/02\/06\/swift-creating-a-custom-delegate\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"(Swift) Creating a Custom Delegate - S(ei)mith.io\" \/>\n<meta property=\"og:description\" content=\"Exposing a function from&nbsp;UIViewController A&nbsp;to a&nbsp;CUSTOM UIVIEW&nbsp;such that you can call it. 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