How to use substring in IOS using Objective-C

To use substring in IOS using Objective-C you can use the snippet below.

Sample Objective-C

NSString *myString = @"http://codesnippets.fesslersoft.de";
NSString *myNewString = [myString substringFromIndex:7]; //myNewString will be "codesnippets.fesslersoft.de"

How to clear notifications in IOS using Objective-C

To clear notifications in IOS using objective-c you can use the snippet below.

Sample Objective-C

//in method: application:didFinishLaunchingWithOptions
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];

//in method: application:didReceiveRemoteNotification
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 1]; //we need to to increment first
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];