<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Thank you, Adrian. <div class=""><br class=""></div><div class="">(What I meant by “debating the correctness of my code” was that I wanted to talk about the approach and not about the content of the viewDidLoad() method.)</div><div class=""><br class=""></div><div class=""><br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-indent: 0px; widows: 2; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><div style="color: rgb(0, 0, 0); font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;" class="">Cheers,</div><div style="color: rgb(0, 0, 0); font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;" class=""><br class=""></div><div style="color: rgb(0, 0, 0); font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;" class="">Rick Aurbach</div><div style="color: rgb(0, 0, 0); font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;" class=""><br class=""></div></div></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></span></div></div></div></div></div></div></div></div></div><div><blockquote type="cite" class=""><div class="">On Sep 20, 2017, at 3:13 PM, Adrian Zubarev <<a href="mailto:adrian.zubarev@devandartist.com" class="">adrian.zubarev@devandartist.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px;" class="">I don’t get your problem here. If you don’t want to debate the correctness of your code, why are you asking for help or even showing error messages for a code snippet that cannot work?</div><div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px;" class=""><br class=""></div><div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px;" class="">1. Drop the access modifier from the extension itself, because this is only for convenience, which may or may not rule over the members of the extension members. If you’re already explicitly setting the access modifier on the extension members then the convenience access modifier makes no sense.</div><div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px;" class="">2. The code cannot work, because you cannot override `viewDidLoad` on a class that you don’t own, on a subclass of `UISplitViewController` that would be possible.</div><div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class=""></div><span style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">```</span><div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><div class="">class MySplitViewController : UISplitViewController {}</div><div class=""><br class=""></div><div class="">extension MySplitViewController {</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>override open func viewDidLoad() {</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>super.viewDidLoad()</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>/* ... */</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>}</div><div class="">}</div></div><div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">```<br class=""><div id="bloop_sign_1505937863196648192" class="bloop_sign"></div><br class=""><p class="airmail_on">Am 20. September 2017 um 21:41:31, Rick Aurbach via swift-users (<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>) schrieb:</p><blockquote type="cite" class="clean_bq"><span class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""></div><div class=""><div class="">I am trying to write an extension to a UIKit class, but am running into a can’t-win situation:</div><div class=""><br class=""></div><div class="">The code I ‘want’ to write looks like:</div><div class=""><br class=""></div><div class=""><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Helvetica; background-color: rgb(255, 252, 234); min-height: 14px;"><br class=""></div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; color: rgb(195, 89, 0); background-color: rgb(255, 252, 234);"><span class="" style="color: rgb(54, 86, 138);">public</span><span class="Apple-converted-space"> </span><span class="" style="color: rgb(54, 86, 138);">extension</span><span class="Apple-converted-space"> </span>UISplitViewController<span class="Apple-converted-space"> </span><span class="" style="">{</span></div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; background-color: rgb(255, 252, 234);"><span class="" style="color: rgb(54, 86, 138);">override</span><span class="Apple-converted-space"> </span><span class="" style="color: rgb(54, 86, 138);">public</span><span class="Apple-converted-space"> </span><span class="" style="color: rgb(54, 86, 138);">func</span><span class="Apple-converted-space"> </span><span class="" style="text-decoration: underline;">v</span>iewDidLoad() {</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; color: rgb(88, 126, 168); background-color: rgb(255, 252, 234);"><span class="" style="color: rgb(54, 86, 138);">super</span><span class="" style="">.</span>viewDidLoad<span class="" style="">()</span></div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; color: rgb(88, 126, 168); background-color: rgb(255, 252, 234);"><span class="" style="color: rgb(54, 86, 138);">if</span><span class="Apple-converted-space"> </span><span class="" style="color: rgb(195, 89, 0);">UIDevice</span><span class="" style="">.</span>current<span class="" style="">.</span>userInterfaceIdiom<span class="Apple-converted-space"> </span><span class="" style="">== .</span>pad<span class="Apple-converted-space"> </span><span class="" style="">{</span></div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; color: rgb(88, 126, 168); background-color: rgb(255, 252, 234);">preferredDisplayMode<span class="Apple-converted-space"> </span><span class="" style="">= .</span>automatic</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; background-color: rgb(255, 252, 234);">}<span class="Apple-converted-space"> </span><span class="" style="color: rgb(54, 86, 138);">else</span><span class="Apple-converted-space"> </span>{</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; color: rgb(88, 126, 168); background-color: rgb(255, 252, 234);">preferredDisplayMode<span class="Apple-converted-space"> </span><span class="" style="">= .</span>primaryOverlay</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; background-color: rgb(255, 252, 234);">}</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; background-color: rgb(255, 252, 234);">}</div><div class="" style="margin: 0px; font-size: 12px; line-height: normal; font-family: Menlo; background-color: rgb(255, 252, 234);">}</div></div><div class=""><br class=""></div><div class="">This generates the error message </div><blockquote class="" style="margin: 0px 0px 0px 40px; border: none; padding: 0px;"><div class=""><div class="">/Users/rlaurb/Projects/Cooks-Memory/Cooks-Memory/AppDelegate.swift:131:23: Overriding instance method must be as accessible as the declaration it overrides</div></div><div class=""><div class="">/Users/rlaurb/Projects/Cooks-Memory/Cooks-Memory/AppDelegate.swift:131:23: Overridden declaration is here (UIKit.UIViewController)</div></div><div class=""><br class=""></div></blockquote>But I can’t change the access control of the function to ‘open’, because I get the warning that the function can’t be “more” accessible than the extension.<div class=""><br class=""></div><div class="">And I can’t change the extension’s access to ‘open’ because apparently extensions can’t be open.</div><div class=""><br class=""></div><div class="">Now I don’t want to get into a debate about whether this code works — it’s just an experiment — but is it even possible to express this idea?? I.e., is it possible to express this idea without subclassing?<br class=""><br class=""><div class=""><div class="" style="letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="text-align: start; text-indent: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="" style="letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="" style="font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;">Cheers,</span></div><div class="" style="font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;"><br class=""></span></div><div class="" style="font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;">Rick Aurbach</span></div><div class="" style="font-family: Arial; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;"><br class=""></span></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>_______________________________________________<br class="">swift-users mailing list<br class=""><a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-users" class="">https://lists.swift.org/mailman/listinfo/swift-users</a></div></div></span></blockquote></div></div></blockquote></div><br class=""></div></body></html>