ios - self.property = self.property in objective c -


good morning, looking through old code online in objective c , having trouble finding out following means.

the class subclassing uiview , following uiscrollviewdelegate protocol. following class method have questions about:

@property(nonatomic, strong) nsdate * _nonnull date;  - (void)layoutsubviews {     [super layoutsubviews];      if(!self.pagingview) {         uiscrollview *pagingview = [[uiscrollview alloc] initwithframe:self.bounds];         pagingview.pagingenabled = yes;         pagingview.directionallockenabled = yes;         pagingview.delegate = self;         [pagingview setautoresizingmask:uiviewautoresizingflexiblewidth | uiviewautoresizingflexibleheight];         [self addsubview:pagingview];         self.pagingview = pagingview;     }      cgrect f = self.pagingview.bounds;     cgsize s = self.pagingview.contentsize;     if(s.width != f.size.width * 3) {         self.date = self.date;         } }

first, not sure [super layoutsubviews] achiving , not sure self.date = self.date trying do. setting itself? if so, not able work swift. (which trying convert code to)

https://github.com/daij-djan/ddcalendarview/blob/master/ddcalendarview_objc/ddcalendarview.m

thanks again help;

looking @ code posted, setdate: method performing view setup, doing self.date = self.date; author's way of forcing setup done without changing set date. better done if view setup code factored out of setdate:, make call setup after new date set. in above code, call setup method, updatedateviews or along lines.

as question code calling [super layoutsubviews];, idea time override method call superclass implementation, unless know sure superclass implementation , know don't need call it, , in rare cases don't want call it. rule of thumb add call superclass method. it's same when override viewwillappear:, viewwilldisappear:, etc. should calling superclass implementation those.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^
Read more