iphone-sdk-3.0

Heres the code I'm using, see my error afterwards @interface MyAppDelegate : NSObject { NSString *userName; } @property (nonatomic, retain) NSString *userName; ... @end and in the .M file for the App Delegate you would write: @implementation MyAppDelegate @synthesize userName; ... @end Then, whenever you want to fetch or write userName, you would write: MyAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; someClass.someString = appDelegate.userName; //..to fetch appDelegate.userName = ..some NSString..; //..to write warning: type 'id ' does not conform to the

What is the best way to calculate the distance between two points/Or we can say while we walk calculate distance traveled using accelerometer? My main question is that i'm working on an application in which i need to count distance using two locations but sometimes the core locations fails to update location so at that time how do i calculate the distance traveled? Dave DeLong You can't even get an accurate measurement of velocity from the accelerometer , so you're definitely not going to be able to get an accurate measure of distance traveled. 来源： https://stackoverflow.com/questions/2115288

I am playing with CoreAudio on the iPhone, and I am unable to find how to know when the song has finished to play. I put a property listener on kAudioQueueProperty_IsRunning , it is working when starting playing but not at the end of the file. It's work when I stop AudioQueue... Do you have an idea ? Thanks a lot. PS : I am using sample code from the excellent book iPhone Cool Projects : http://apress.com/book/downloadfile/4453 Edit : there’s a bug in the code that went out with the book. The fix requires a small modification to -[AudioPlayer audioRequestDidFinish:] so that it calls [queue

I am trying to fire a method once a day at a given time. I've tried a few things but I can't really make it work. any advice would be appreciated. Also, it would be ideal if it would fire regardless of if the app is open or not. Is this possible? UILocalNotification will let you fire a notification (but not a method) when your app is running in the background, or will call a delegate method you implement (application:didReceiveLocalNotification:) if the app is running in the foreground, or will call a method you must implement (application:didFinishLaunchingWithOptions:) when the user responds

Some recent version of iOS caused my app icon to turn white. I've gone through everything in regards to images and can't find the issue. I'm running Xcode 3.2.5 with sdk 4.2. I do have an entry for "Icon files" in Info.plist with 5 keys: Item 0 myapp.png Item 1 myapp@2x.png Item 2 myapp-72.png Item 3 myapp-Small-50.png Item 4 myapp-Small.png Item 5 myapp-Small@2x.png All the above have proper dimensions. I see the image in 'Copy Bundle Resources' and also in the .app file for the simulator version. It is properly reference by name in 'Icon files', Item 0. It is not named Default.png since it