// // RootViewController.h prob in Software Create Code 3 of 9 in Software // // RootViewController.h prob

How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
// // RootViewController.h prob generate, create code-39 none with software projects Android Declaring delegate and implementing methods for storing the name of the customers #import <UIKit/UI Kit.h> #import <CoreData/CoreData.h> #import "AddNameController.

h". [ 107 ]. Creating, Listing, a nd Deleting Names of Customers @interface RootViewController : UITableViewController <NSFetchedResultsControllerDelegate, AddNameControllerDelegate> { @private NSFetchedResultsController *fetchedResultsController_; NSManagedObjectContext *managedObjectContext_; } @property (nonatomic, retain) NSManagedObjectContext *managedObjectContext; @property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController; @end. The preceding file i Code 39 Extended for None s declared as delegate for two protocols, namely, NSFetchedResultsControllerDelegate and AddNameControllerDelegate, that is, it will implement the methods of both the protocols. Also, the file declares instance variables of NSFetchedResultsController and NSManagedObjectModel by the names fetchedResultsController and managedObjectContext. Also, all the instance variables are defined as properties with the two attributes retain and nonatomic for generating the accessor and mutators without any overhead code (when synthesized) and for keeping the objects retained to the mutators without being flushed from memory.

The implementation file of the RootViewController class will carry the default code that is automatically generated for us by the Navigation-based Application project template. We will add the code to this file. The highlighted code that appears in the following code listing is the added code.

The complete file is provided in the code bundle of this chapter. The code that needs explanation is shown next:. // // RootViewController.m prob #import "RootViewCon Software barcode 3/9 troller.h" @interface RootViewController () - (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath; @end. @implementation Root ViewController @synthesize fetchedResultsController=fetchedResultsController_, manage dObjectContext=managedObjectContext_;. [ 108 ]. 5 . Synthesizing the fet bar code 39 for None chedResultsController and managedObjectContext properties, that is, generating the accessor and mutator methods for the properties (instance variable: fetchedResultsController and managedObjectContext).. - (void)viewDidLoad { [super viewDidLoad]; // Set up the edit and add buttons. self.navigationItem.

leftBarButtonItem = self.editButtonItem; UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addCustomer)]; self.navigationItem.

rightBarButtonItem = addButton; [addButton release]; NSError *error = nil; if (![[self fetchedResultsController] performFetch:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } }. The viewDidLoad meth Software USS Code 39 od calls its super class. After that, two Bar Button Item buttons are set to appear on the left and right side of the navigation bar respectively. The button displayed on the left side of the navigation bar is the Edit button that is displayed by using the editButtonItem property of the UIViewController.

For the right side, we create an addButton using the alloc method and make it appear on the right side of the navigation bar. The RootViewController inherits from UIViewController, which provides a property named editButtonItem, which in turn returns an Edit button. Using dot notation, we retrieve editButtonItem and pass it to the mutator for left Bar Button Item.

The title of the Edit button automatically changes to Done when selected. To the Add button, we attach an addCustomer action (method that will be executed when the Add button is selected by the user). After the creation and initialization of the left and right side Bar Button Items of the navigation bar, the performFetch: message is invoked on an object returned by the method fetchedResultsController to display the result retrieved in fetchedResultsController.

Recall that the fetchedResultsController contains the entities specified by the fetch request, arranged on the attribute specified by the sort descriptor.. - (void)configureCel l:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath { NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath]; [ 109 ]. Creating, Listing, a 3 of 9 barcode for None nd Deleting Names of Customers cell.textLabel.text = [[managedObject valueForKey:@"name"] description]; }.

In the cell atIndexP ath method, we retrieve the managed object from the fetchedResultsController instance. Recall that the NSFetchedResultsController stores the set of entities from an NSManagedObjectContext that are retrieved on the basis of FetchRequest. Then, by making use of KVC, the value stored in the name attribute of the managed object is assigned to the table cell for display.

The concept of KVC is explained in detail after this program.. - (NSInteger)numberO Code 39 Full ASCII for None fSectionsInTableView:(UITableView *)tableView { return [[fetchedResultsController sections] count]; }. The numberOfSections InTableView method defines the number of sections for the table view. The section"s message is passed to the fetchedResultsController (as it contains the entities retrieved on the basis of fetch request) and its count is returned..

- (NSInteger)tableVi barcode 3/9 for None ew:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section { id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section]; return [sectionInfo numberOfObjects]; }. The numberOfRowsInSe ction method is for returning the count of the rows (number of objects) in the concerned section. The section selected is the one that is returned by the fetched results controller (the section returned by calling objectAtIndexPath: on the fetchedResultsController instance and passing in the section parameter to it). Then, we request a reference to the NSFetchedResultsSectionInfo instance for the specified section.

We then return the count of the objects in the current section.. // Customize the app Software Code 39 Extended earance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIn dexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. [self configureCell:cell atIndexPath:indexPath]; [ 110 ].

5 return cell; }. The cellForRowAtInde Software barcode code39 xPath method invokes the cell atIndexPath method to display the value stored in the name attribute of the managed object.. // Override to suppo rt editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITabl eViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *) indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the managed object for the given index path NSManagedObjectContext *context = [self. fetchedResultsController managedObjectContext]; [context deleteObject:[self.

fetchedResultsController objectAtIndexPath:indexPath]]; // Save the context. NSError *error = nil; if (![context save:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } } }. The commitEditingSty barcode 39 for None le method is used for editing the table cells (and hence the managed objects). In the preceding code, we are deleting current table cell contents (that is, the managed object in the current row of the table view). We first confirm whether we want to initiate the delete operation.

If yes, then we retrieve the managed object context from the fetchedResultsController and the object is deleted from the context. The object deleted is the one that is returned by the fetchedResultsController (the object returned by calling objectAtIndexPath: on the fetchedResultsController and passing in the indexPath parameter to it). Finally, the managed object context"s save: method is called to commit the changes into the persistent store.

. - (BOOL)tableView:(U ITableView *)tableView canMoveRowAtIndexPath:(NSIn dexPath *)indexPath { // The table view should not be re-orderable. return NO; }. [ 111 ].
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