Using [self method] or @selector(method)?

Posted by fuzzygoat on Stack Overflow See other posts from Stack Overflow or by fuzzygoat
Published on 2010-04-20T11:58:08Z Indexed on 2010/04/20 12:13 UTC
Read the original article Hit count: 193

Filed under:

cocoa-touch

|

objective-c

|

iphone

Can anyone enlighten me as to the differences between the two statements below.

[self playButtonSound];

AND:

[self performSelector:@selector(playButtonSound)];

I am just asking as I had some old code that used @selector, now with a little more knowledge I can't think why I did not use [self playButtonSound] instead, they both seem to do the same as written here.

gary

© Stack Overflow or respective owner

Related posts about cocoa-touch

adding UIImageView to UIScrollView throws exception cocoa touch for iPad

as seen on Stack Overflow - Search for 'Stack Overflow'
I am a noob at OBJ-C :) I am trying to add a UIImageView to a UIScrollView to display a large image in my iPad app. I have followed the tutorial here exactly: http://howtomakeiphoneapps.com/2009/12/how-to-use-uiscrollview-in-your-iphone-app/ The only difference is that in my App the View is… >>> More
Cocoa Touch text view with aligned, justified text

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to create a textview with predefined height that will contain justified text. When entering the text into the view, I need to be able to check when the view is full. How would I do this? Core Text? I am using sdk-3.2. >>> More
Managing subviews in Cocoa Touch

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm developing an iPhone app. I need to create a Quiz application that has different Question views embedded in it (see my similar question). Different types of Question will have different behavior, so I plan to create a controller class for each type of Question. The MultipleChoiceQuestionController… >>> More
Reading .ppt (MS PowerPoint) file in Cocoa Touch

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, Any idea how to read a .ppt file in Cocoa Touch ? I tried to load the contents of the file in UIWebView but it didn't work. Here is the code : [aWebView loadData:[NSData dataWithContentsOfFile:filePath] MIMEType:@"application/vnd.ms-powerpoint" textEncodingName:@"utf-8" … >>> More
Repeating events on a gregorian calendar in Cocoa Touch

as seen on Stack Overflow - Search for 'Stack Overflow'
How would I set up a gregorian calendar in cocoa touch and set an event that will repeat every X days? Thanks >>> More

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More