{"id":2511,"date":"2016-05-31T20:43:13","date_gmt":"2016-05-31T16:43:13","guid":{"rendered":"https:\/\/blog.alwawee.ru\/?p=2511"},"modified":"2016-05-31T20:43:13","modified_gmt":"2016-05-31T16:43:13","slug":"how-to-create-semi-transparent-outside-border-for-uiimageview","status":"publish","type":"post","link":"https:\/\/blog.alwawee.ru\/?p=2511","title":{"rendered":"How to create semi-transparent outside border for UIImageView"},"content":{"rendered":"<p>Just in case if somebody looks for an UIImage with transparent outside border. If you simply set a layer border, you will get a transparent border, but you will see inside image behind that border, not outside image. I managed to create an ImageView with transparent outside border.<\/p>\n<p>It looks like this:<br \/>\n<a href=\"https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image.png\" alt=\"cool image\" width=\"1246\" height=\"462\" class=\"aligncenter size-full wp-image-2512\" srcset=\"https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image.png 1246w, https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image-300x111.png 300w, https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image-1024x380.png 1024w\" sizes=\"auto, (max-width: 1246px) 100vw, 1246px\" \/><\/a><\/p>\n<p>The idea is simple. I save UIImage from UIImageView. Then I remove UIImage and set initial layer as border layer. Then I put a new smaller sublayer above it and set a saved UIImage as contents of it.<\/p>\n<pre>\r\n    #import <UIKit\/UIKit.h>\r\n    \r\n    @interface SSCircleImageView : UIImageView\r\n    \r\n    \r\n    @end\r\n\r\n--------------------\r\n\r\n    \r\n    #import \"SSCircleImageView.h\"\r\n    \r\n    \r\n    \r\n    @implementation SSCircleImageView\r\n    \r\n    \r\n    const CGFloat borderWidth = 5.0f;\r\n    const CGFloat borderAlpha = 0.3f;\r\n    \r\n    \r\n    - (void)awakeFromNib\r\n    {\r\n        UIImage *image = self.image;\r\n        self.image = nil;\r\n        \r\n        self.clipsToBounds = YES;\r\n        self.layer.cornerRadius = self.frame.size.width \/ 2.0;\r\n        self.layer.borderWidth = borderWidth;\r\n        self.layer.borderColor = [[UIColor colorWithWhite:1.0f alpha:borderAlpha] CGColor];\r\n        \r\n        CALayer *subLayer = [CALayer layer];\r\n        subLayer.frame =  CGRectInset(self.bounds, self.layer.borderWidth, self.layer.borderWidth);\r\n        subLayer.cornerRadius = subLayer.frame.size.width \/ 2.0;\r\n        subLayer.contents = (id)image.CGImage;\r\n        [self.layer addSublayer:subLayer];\r\n    }\r\n    \r\n    \r\n    \r\n    @end\r\n<\/pre>\n<p>The same approach can be used for UIButton or UIView.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Just in case if somebody looks for an UIImage with transparent outside border. If you simply set a layer border, you will get a transparent border, but you will see inside image behind that border, not outside image. I managed to create an ImageView with transparent outside border. It looks like this: The idea is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[183,187,55,182,184],"class_list":["post-2511","post","type-post","status-publish","format-standard","hentry","category-ios","tag-calayer","tag-ios","tag-uibutton","tag-uiimageview","tag-uiview"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to create semi-transparent outside border for UIImageView - Denis Kutlubaev<\/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:\/\/blog.alwawee.ru\/?p=2511\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to create semi-transparent outside border for UIImageView - Denis Kutlubaev\" \/>\n<meta property=\"og:description\" content=\"Just in case if somebody looks for an UIImage with transparent outside border. If you simply set a layer border, you will get a transparent border, but you will see inside image behind that border, not outside image. I managed to create an ImageView with transparent outside border. It looks like this: The idea is [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.alwawee.ru\/?p=2511\" \/>\n<meta property=\"og:site_name\" content=\"Denis Kutlubaev\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/alwaweemobile\" \/>\n<meta property=\"article:published_time\" content=\"2016-05-31T16:43:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.alwawee.ru\/wp-content\/uploads\/2016\/05\/cool-image.png\" \/>\n<meta name=\"author\" content=\"Denis Kutlubaev\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Denis Kutlubaev\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511\"},\"author\":{\"name\":\"Denis Kutlubaev\",\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/#\\\/schema\\\/person\\\/58f1f1f57155b48afab83ba53b3e26a7\"},\"headline\":\"How to create semi-transparent outside border for UIImageView\",\"datePublished\":\"2016-05-31T16:43:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511\"},\"wordCount\":108,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blog.alwawee.ru\\\/wp-content\\\/uploads\\\/2016\\\/05\\\/cool-image.png\",\"keywords\":[\"CALayer\",\"iOS\",\"UIButton\",\"UIImageView\",\"UIView\"],\"articleSection\":[\"iOS\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511\",\"url\":\"https:\\\/\\\/blog.alwawee.ru\\\/?p=2511\",\"name\":\"How to create semi-transparent outside border for UIImageView - 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