[iOS] SMS/E-Mail

Message UI Framework Reference
System Message Programming Topics for iOS

Example:
MessageComposer
MailComposer

[iOS] Notification Center

Reference1
NSNotificationCenter Class Reference
Keyboard using NSNotificationCneter

[iOS] UIAlertView

UIAlert View with multiple options.

in .h: include UIAlertViewDelegate

@interface MyController : UIViewController <UIAlertViewDelegate> {

}

in .m: implement delegate for UIAlertViewDelegate

#pragma UIAlertView

- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

    NSLog(@"%d", buttonIndex);

}

Reference1
Reference2: Works on later iOS5
How Can I customize UIAlertView

[iOS] UIActionSheet

UIActionSheet Class Reference
Move Cancel Button from top to bottom

In .h: include UIAlertViewDelegate

@interface MyController : UIViewController <UIAlertViewDelegate> {

}

In .m: implement delegates

- (void) ShowActionSheet:(NSString *)title {

    UIActionSheet *actionSheet = [[UIActionSheet alloc] 

                                  initWithTitle:title

                                  delegate:self

                                  cancelButtonTitle:nil

                                  destructiveButtonTitle:nil 

                                  otherButtonTitles: nil];

    

    [actionSheet addButtonWithTitle:@"Option 1"];

    [actionSheet addButtonWithTitle:@"Option 2"];

    [actionSheet addButtonWithTitle:@"Option 3"];

    [actionSheet addButtonWithTitle:@"Cancel"];

    actionSheet.cancelButtonIndex = actionSheet.numberOfButtons;

    

    [actionSheet showInView:self.view];

    [actionSheet release];

}

- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {

    NSLog(@"title=%@, buttonIndex: %d, cancelButtonIndex: %d, firstOtherButtonIndex: %d",

          actionSheet.title,

          buttonIndex, 

          actionSheet.cancelButtonIndex, 

          actionSheet.firstOtherButtonIndex);

}

[iOS] UIBarButtonSystemItem types

reference 1

reference 2

[iOS] Apple Certification Expired

When your Apple certification is expired, you have to remove it and request a new cert as well as provision profiles. Here is the solution for this issue.

Code Sign Errors: profile doesn’t match any valid certificate/private key pair in the default keychain

[iOS] Core Data references

Getting Started with Core Data
Introduction to Core Data Programming Guide
Core Data Tutorial for iOS
Introduction to Core Data Utility Tutorial
XCode Entity Modeling Tools for Core Data
XCode Mapping Tool for Core Data
Core Data Model Versioning and Data Migration
Core Data Release Notes for iOS v5.0
Using Core Data with iCloud Release Notes

Sample Code:
Top Songs
iPhoneCoreDataRecipes
ThreadedCoreData
PhotoLocations
TaggedLocations
Locations
CoreDataBooks
DateSectionTitles

Reference:
Core Data Framework Reference