{"id":9705,"date":"2022-09-20T08:33:30","date_gmt":"2022-09-20T03:03:30","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-second-if-statement-gets-called-before-first-statement-finished-in-one-function\/"},"modified":"2022-09-20T08:33:30","modified_gmt":"2022-09-20T03:03:30","slug":"solved-second-if-statement-gets-called-before-first-statement-finished-in-one-function","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-second-if-statement-gets-called-before-first-statement-finished-in-one-function\/","title":{"rendered":"[Solved] Second If statement gets called before first statement finished in one function"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-41985003\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"41985003\" data-parentid=\"41984864\" data-score=\"2\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"js-endorsements\" data-for-answer=\"41985003\">\n<\/div>\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Asynchronous methods!  You have to wait for the completion before you move on to the next step.<\/p>\n<p>Put the second block within the first completion handler &#8211; like this<\/p>\n<pre><code>func pictureFromFirebase(loginMethod: Int)\n{\n    if loginMethod == 0 \/\/FB\n    {\n        var profilePic = FBSDKGraphRequest(graphPath: \"me\/picture\", parameters: [\"height\":300, \"width\":300, \"redirect\":false], httpMethod: \"GET\")\n        let profilePicRef = storageRef.child((user?.uid)!+\"\/profile_pic.jpg\")\n        profilePicRef.data(withMaxSize: 1 * 1024 * 1024) { data, error in\n            if let error = error {\n                \/\/ Uh-oh, an error occurred!\n                \/\/ but we don't need to do anything yet.  Try to download the profile pic\n            }\n            if (data != nil)\n            {\n                print(\"no need to download image from facebook\")\n                self.profileImage.image = UIImage (data: data!)\n            }\n            else\n            {\n                \/\/ THIS IS THE BLOCK THAT HAS BEEN MOVED\n                \/\/ WHICH WILL NOW BE EXECUTED IN TWO CONDITIONS - \n                \/\/ 1. AN ERROR IN THE DOWNLOAD\n                \/\/ 2. NO PROFILE PIC AVAILABLE\n                print(\"downloading image from facebook\")\n                profilePic?.start(completionHandler: {(_ connection, _ result, _ error) -&gt; Void in\n                    if (error == nil)\n                    {\n                        if let dictionary = result as? [String:Any], let data = dictionary[\"data\"] as? [String:Any],\n                            let urlPic = data[\"url\"] as? String {\n                            if let imageData = NSData(contentsOf: NSURL(string: urlPic)! as URL)\n                            {\n                                let uploadTask = profilePicRef.put(imageData as Data, metadata: nil){\n                                    metadata, error in\n                                    if (error == nil)\n                                    {\n                                        let downloadUrl = metadata!.downloadURL\n                                    }\n                                    else\n                                    {\n                                        print(\"error in downloading image\")\n                                    }\n                                }\n                                self.profileImage.image = UIImage(data: imageData as Data)\n                            }\n                        }\n\n                    }\n                })\n            }\n\n        }\n    }\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">8<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Second If statement gets called before first statement finished in one function <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Asynchronous methods! You have to wait for the completion before you move on to the next step. Put the second block within the first completion handler &#8211; like this func pictureFromFirebase(loginMethod: Int) { if loginMethod == 0 \/\/FB { var profilePic = FBSDKGraphRequest(graphPath: &#8220;me\/picture&#8221;, parameters: [&#8220;height&#8221;:300, &#8220;width&#8221;:300, &#8220;redirect&#8221;:false], httpMethod: &#8220;GET&#8221;) let profilePicRef = storageRef.child((user?.uid)!+&#8221;\/profile_pic.jpg&#8221;) &#8230; <a title=\"[Solved] Second If statement gets called before first statement finished in one function\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-second-if-statement-gets-called-before-first-statement-finished-in-one-function\/\" aria-label=\"More on [Solved] Second If statement gets called before first statement finished in one function\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[980,1114,413,639,522],"class_list":["post-9705","post","type-post","status-publish","format-standard","hentry","category-solved","tag-firebase","tag-firebase-realtime-database","tag-function","tag-if-statement","tag-swift"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Second If statement gets called before first statement finished in one function - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-second-if-statement-gets-called-before-first-statement-finished-in-one-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Second If statement gets called before first statement finished in one function - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Asynchronous methods! You have to wait for the completion before you move on to the next step. Put the second block within the first completion handler &#8211; like this func pictureFromFirebase(loginMethod: Int) { if loginMethod == 0 \/\/FB { var profilePic = FBSDKGraphRequest(graphPath: &quot;me\/picture&quot;, parameters: [&quot;height&quot;:300, &quot;width&quot;:300, &quot;redirect&quot;:false], httpMethod: &quot;GET&quot;) let profilePicRef = storageRef.child((user?.uid)!+&quot;\/profile_pic.jpg&quot;) ... 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You have to wait for the completion before you move on to the next step. Put the second block within the first completion handler &#8211; like this func pictureFromFirebase(loginMethod: Int) { if loginMethod == 0 \/\/FB { var profilePic = FBSDKGraphRequest(graphPath: \"me\/picture\", parameters: [\"height\":300, \"width\":300, \"redirect\":false], httpMethod: \"GET\") let profilePicRef = storageRef.child((user?.uid)!+\"\/profile_pic.jpg\") ... 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