On 12 May 2010, at 17:54, sebi wrote: > Hello, > > How can I find out if my first view is up and running? When viewDidAppear is > called on my fist UIViewController I'm still looking only at the Default.png. > > What I do first in my app is: > 1. wait for viewDidAppear to be called > 2. show some wait-indicator > 3. load some data from the net > 4. hide the wait-indicator > 5. display the loaded data > > The problem is, that the Default.png doesn't go away until the data is fully > loaded, so the user only sees a passive screen for some time and doesn't know > what's going on. > Where can I start the wait indicator and download process so that the user > actually sees it? > I use some NavigationControllers within a TabBarController, could that be the > problem?
It sounds like you're not handing control back to the run loop at any point in this process. What you probably want to do is this instead: Main Thread: 1. wait for viewDidAppear to be called 2. show the wait indicator 3. Start thread B 4. Hand control back by leaving your method's scope Thread B: 1. Load some data from the net. 2. use performSelectorOnMainThread:... to fire off a message that the data has finished loading. Main Thread: 1. On receiving said message, hide the wait indicator 2. display the loaded data. Bob_______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
