On 13/04/2013, at 11:30 AM, YT <y...@redwoodcontent.com> wrote: > Perhaps my approach is wrong. Looking for advise. > > So I'd like to define a Class called Preference. > > In main.m I'd like to create an object called myPreferences before the code > line > > return NSApplicationMain(argc, (const char**)); is run; > > I assume the object myPreferences will persist the life of the program. > > So how can I make the ID of myPreferences known to all objects in the program? > > Is this even possible? > > OK! So I'm trying to create an object with global scope so all other objects > can get and put data in it. > > AND OK! Its true I'm not yet a mature Objective-C programmer. Ya know one > that doesn't know what I can't do.
Tip: don't reinvent the wheel. There is already a class, NSUserDefaults, which is designed for this purpose. The use of global variables is strongly discouraged, but you can create the equivalent using a singleton object. NSUserDefaults provides this using +[NSUserDefaults standardUserDefaults] which is accessible from every part of your app at all times. You probably don't really want to access preferences prior to running NSApplicationMain - I can't think of a sensible use case for that. Instead, just access each preference at the point where it's actually required - don't attempt to set up a whole bunch of state before anyone really needs it, it just slows down launch - do it lazily. For app-wide state, the NSApplication delegate method -applicationDidFinishLaunching is often a good place. NSUserDefaults also provides a mechanism (-[NSUserDefaults registerDefaults]) for setting initial values for preferences from a plist resource which is useful if any of your default preferences are something other than 0/nil/NO. --Graham _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
