Comments on: A Java Developer’s Guide to Threads on iPhone

By: Dave Casserly

Dave Casserly — Wed, 17 Feb 2010 09:47:15 +0000

Thanks for this. Very handy. However…..

In you comment you said you can do this:

- (void) run:(NSString *)someValue someOtherValue:(NSString *)value;
// @selector(run:someOtherValue:)

However, NSThread documentation:
+ (void)detachNewThreadSelector:(SEL)aSelector toTarget:(id)aTarget withObject:(id)anArgument

…reads that you can only pass one argument into the thread.

Thanks

By: Abe

Abe — Thu, 12 Nov 2009 05:13:12 +0000

Thank you! I never leave comments.. but I just had to say thanks for this one!

By: NutSteenuedow

NutSteenuedow — Fri, 24 Apr 2009 02:51:15 +0000

I’m the only one in this world. Can please someone join me in this life? Or maybe death…

By: Rodney Aiglstorfer

Rodney Aiglstorfer — Fri, 17 Oct 2008 03:58:16 +0000

@John,

~~Yes you are correct. Thanks for catching that! Should be correct now.~~

I stand corrected … because the run method doesn’t take any arguments, there should be no ‘:’.

For example, had the method signature looked like:

- (void) run:(NSString *)someValue;

then and only then would the selector look like:

@selector(run:)

and to further illustrate the usage, consider the following three run methods and their respective selectors …

- (void) run; // @selector(run)
- (void) run:(NSString *)someValue; // @selector(run:)
- (void) run:(NSString *)someValue someOtherValue:(NSString *)value; // @selector(run:someOtherValue:)

By: John

John — Fri, 17 Oct 2008 00:15:34 +0000

Thanks for the article.

One thing: should there be a colon after ‘run’ when handing it off as a selector?

e.g.

@selector(run:)

instead of

@selector(run)