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// // AddProductController.m prob using barcode generator for software control to generate, create barcode 3/9 image in software applications. Oracle Reports Overview Invoking the delegate methods from the implementation file #import "AddProductContr oller.h" @implementation AddProductController @synthesize newitemname, newquantity, newprice; @synthesize prod, delegate, cancelbutton, savebutton; -(IBAction) cancel:(id) sender { [ 198 ]. 8 [delegate addprodCont bar code 39 for None roller: self selectedsave:NO]; } -(IBAction) save:(id)sender{ prod.itemname=newitemname.text; prod.

quantity=[NSNumber numberWithInt:(int) [newquantity.text intValue]] ; prod.price=[NSNumber numberWithInt:(int) [newprice.

text intValue] ]; [delegate addprodController:self selectedsave: YES]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; self.title=@"New Product"; self.

navigationItem.rightBarButtonItem=savebutton; self.navigationItem.

leftBarButtonItem=cancelbutton; } - (void)dealloc { [newitemname release]; [newquantity release]; [newprice release]; [savebutton release]; [cancelbutton release]; [prod release]; [super dealloc]; } @end. We can see in the preced ing code that first of all, we synthesize the IBOutlets (newitemname, newquantity, newprice, prod, delegate, cancelbutton, and savebutton) for generating the accessor and mutator methods for them. In the action method: cancel, we write code to invoke the addprodController method of the delegate class (ProductInfoController class that we are going to create in the following module) and set the value of the parameter selectedsave to NO. Similarly, in the action method: save, we invoke the addprodController method of the delegate and set the value of the parameter: selectedsave to YES.

The value of the selectedsave parameter will decide whether to persist the information of the product or not. In the save action method, we assign the information of the product entered by the user in the three Text Fields to the item name, quantity, and price attributes of the prod object (of the Product class)..

[ 199 ]. Entering, Saving, Listing, and Deleting the Records of the Products Sold to the Customers In the viewDidLoad metho Software barcode 39 d, we set the Navigation Item"s title to New Product and its right Bar Button Item is set to savebutton (instance variable of Bar Button Item with the Title: Save). Also, the left Bar Button Item of the navigation bar is set to cancelbutton the instance variable of the UIBarButtonItem class with Title: Cancel. Finally, through the dealloc method, we release the memory reserved by different outlets.

We cannot run this module until and unless we implement the methods of the AddProductControllerDelegate protocol in the ProductInfoController class, which we are going to create in the following module.. Developing a module to create a menu for manipulating the product information In this module, we will Software ANSI/AIM Code 39 learn how to create a Product"s menu that contains several buttons, which can be invoked to see the information of the products sold to the selected customer, to add more products, and to delete existing products. The steps involved in developing this module are as follows: 1. Adding the ViewController class: ProductInfoController class to display the Product"s menu to manipulate the product"s information.

2. Defining the outlets and action methods in the header file: ProductInfoController.h.

3. Designing the View of the ProductInfoController class and connecting the controls. 4.

Coding in the implementation file: ProductInfoController.m to save, edit, and display the product"s information..

[ 200 ]. 8 . We will add a View Contr oller with the name ProductInfoController that displays the information of the products sold to the customers. This View Controller will contain a table view to display the list of products sold to the customers and will have a toolbar at the header of table view with three buttons: Back, Edit, and Add. The Back button will navigate us back to the View of the DisplayCustomerController from where this ViewController class will be invoked, the Edit button will display the Delete accessory to delete an entry of product, and the Add button will navigate us to the View of AddProductController (we have just created in the first module to enter the information of the products sold to the customer).

The steps for adding View Controller, ProductInfoController are as follows: 1. Right-click on the Classes group in the Xcode Project window, and select the Add . New File option. 2. Sel Code-39 for None ect Cocoa Touch Class from under the iPhone OS heading in the left pane and select the UIViewController subclass as the template of the new file to choose from.

3. Select the checkbox With XIB for user interface (which will be used for creating View for the View Controller to display the product information and a toolbar) followed by the Next button. 4.

We get a dialog box to specify the name of the View Controller. Let us assign the name as: ProductInfoController.m and select the checkbox Also create "ProductInfoController.

h", followed by the Finish button. Both the files: ProductInfoController.h and ProductInfoController.

m will be created along with the .xib file and added to our project. The files will be placed at the default location: Classes subfolder of our application folder.

5. Select the ProductInfoController.xib file in the Classes folder and drag it to the Resources folder, the default location of Interface Builder files.

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