iTunes Connect holiday shutdown

App Store submissions will be closed from 23 December to 29 December. Following is the official email from Apple. Also this only applies to Apple iOS developers.

iTunes Connect will be temporarily shut down from Thursday, December 23 to Tuesday, December 28 for the winter holidays. Access will resume on Wednesday, December 29.

During this shutdown, iTunes Connect will be unavailable. In addition, app releases and pricing changes which are scheduled to take place during the shutdown will be handled as follows:

All releases will not appear in the App Store until Wednesday, December 29. This includes apps scheduled to appear on the App Store for the first time as well as updates to existing apps.

Pricing changes will cause the app to become unavailable for purchase until Wednesday, December 29, at which point the app will become available at the new price. Please check to ensure you have not scheduled any price changes during this time.

How to save User preferences in iPhone app

Saving user preferences in iPhone app is fairly easy. It work as key/value pairs in NSUserDefaults object.


To save whether user prefers sounds on or off in your application you can do it as the following code block.

[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"soundsOn"];

And to retrieve the sounds preferences value;

BOOL soundsOn = [[NSUserDefaults standardUserDefaults] boolForKey:@"soundsOn"];

missing sentinel in function call

Quick Tip :
If you're getting "missing sentinel in function call" error while compiling objective-c code, check whether you terminate the array with nil at the end of the array declaration.


feelings = [[NSArray alloc]initWithObjects: @"awesome",@"sad", @"happy","confused",@"angry", nil];