<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="">Yep, declare it like this:<div class=""><div dir="ltr" class=""><span class=""><div class="" style="font-family: HelveticaNeue;"><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>public private(set) var lastUpdated: NSDate?</div><div class=""><br class=""></div><div class="">At least I’m pretty sure that’s the syntax. I don’t have Xcode in front of me to double-check.</div><div class=""><br class=""></div><div class="">HTH</div><div class="">- Dave Sweeris</div></div></span></div><div class=""><div dir="ltr" class=""><span class=""><div class="" style="font-family: HelveticaNeue;"><div class=""><br class=""></div></div></span></div></div><div><blockquote type="cite" class=""><div class="">On Apr 29, 2016, at 9:52 AM, Bob Davidson via swift-users <<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><span class=""><div style="font-family: HelveticaNeue; font-size: 12px;" class="">Hello,<div class=""><br class=""></div><div class="">Does Swift have a syntax for allowing a stored property to be internally changed by a class/structure, but external access is read-only?</div></div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><br class=""></div><div style="font-family: HelveticaNeue; font-size: 12px;" class="">For example, my class/structure may have a date property such as “lastUpdated”. Outside code should have access to read the “lastUpdated” property, but should not be allowed to change it. Periodically, my class may perform an “update” and would internally change the value of “lastUpdated”.</div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><br class=""></div><div style="font-family: HelveticaNeue; font-size: 12px;" class="">The only way I see to support this with a private property and a computed, get-only property:</div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><br class=""></div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>private var internalLastUpdated: NSDate?</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>var lastUpdated: NSDate? { return internalLastUpdated }</div></div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><br class=""></div><div style="font-family: HelveticaNeue; font-size: 12px;" class="">This there a better way?</div><div style="font-family: HelveticaNeue; font-size: 12px;" class=""><br class=""></div><div style="font-family: HelveticaNeue; font-size: 12px;" class="">Thanks,</div><div style="font-family: HelveticaNeue; font-size: 12px;" class="">Bob Davidson</div></span><br class=""></div>
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