zebra barcode printer in vb.net 3: Interface Builder in Objective-C

Generation DataMatrix in Objective-C 3: Interface Builder

CHAPTER 3: Interface Builder
DataMatrix Generation In Objective-C
Using Barcode drawer for iPhone Control to generate, create Data Matrix ECC200 image in iPhone applications.
www.OnBarcode.com
Code 128 Code Set A Maker In Objective-C
Using Barcode creation for iPhone Control to generate, create Code 128B image in iPhone applications.
www.OnBarcode.com
Figure 3 20. Setting Text View properties and the outline view of the Document window
Barcode Drawer In Objective-C
Using Barcode encoder for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
QR Code Generator In Objective-C
Using Barcode drawer for iPhone Control to generate, create QR image in iPhone applications.
www.OnBarcode.com
Now that you have the Text View properly selected, look at the attributes panel of the Inspector (Figure 3 20). Make sure that Rich Text is selected, and then check the Graphics checkbox below it, too. Checking this option allows you to put images within your documents as you will see shortly. That s all you need to do in Interface Builder. Save the NIB and return to Xcode.
Barcode Maker In Objective-C
Using Barcode creation for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
Generate Data Matrix 2d Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Data Matrix ECC200 image in iPhone applications.
www.OnBarcode.com
Implementing File Saving and Reading
Printing Barcode In Objective-C
Using Barcode creator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
UPC-E Supplement 5 Creation In Objective-C
Using Barcode printer for iPhone Control to generate, create GS1 - 12 image in iPhone applications.
www.OnBarcode.com
Back in the Workspace, try running the program. You will see that you already have a capable mini word processor. You can type, copy, and paste. You can bring up the Fonts and Colors panels and set the content accordingly. You can show the Ruler and Set tabs. You can even drag in images. OK, now close the program. You can see that your application even knows to tell you that you have unsaved work (Figure 3 21). So, the sensible thing is to save, right
Painting DataMatrix In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create ECC200 image in VS .NET applications.
www.OnBarcode.com
Data Matrix Generation In Java
Using Barcode printer for Android Control to generate, create ECC200 image in Android applications.
www.OnBarcode.com
CHAPTER 3: Interface Builder
QR Code Generator In Objective-C
Using Barcode creator for iPad Control to generate, create Quick Response Code image in iPad applications.
www.OnBarcode.com
Code 39 Full ASCII Creator In VS .NET
Using Barcode creator for .NET framework Control to generate, create Code 39 Extended image in .NET applications.
www.OnBarcode.com
Figure 3 21. Your application doesn t know how to save documents.
Create Barcode In Java
Using Barcode creator for BIRT reports Control to generate, create Barcode image in BIRT applications.
www.OnBarcode.com
UCC - 12 Generation In VB.NET
Using Barcode drawer for .NET Control to generate, create UCC - 12 image in .NET applications.
www.OnBarcode.com
So what is the problem Although your application is already very capable, it still lacks a couple of features. Among these is the ability to save and read your documents. Xcode recognizes that you might want to have control over the mechanism and format of the data that you read and write, and so this part is left to the programmer to determine. Let s do that now. Find the header file MyDocument.h and make it look like Listing 3 5 (you ll be adding the code in bold).
Code 39 Full ASCII Encoder In None
Using Barcode drawer for Excel Control to generate, create Code 39 image in Microsoft Excel applications.
www.OnBarcode.com
Creating Data Matrix In None
Using Barcode maker for Microsoft Word Control to generate, create Data Matrix image in Word applications.
www.OnBarcode.com
Listing 3 5. Creating the new outlet and instance variable #import <Cocoa/Cocoa.h> @interface MyDocument : NSDocument { IBOutlet NSTextView *textView; NSAttributedString *mString; } @property (retain) NSTextView *textView; @property (retain) NSAttributedString *string; @end
Encode PDF417 In .NET
Using Barcode creator for Reporting Service Control to generate, create PDF-417 2d barcode image in Reporting Service applications.
www.OnBarcode.com
Code 3 Of 9 Drawer In None
Using Barcode generation for Microsoft Word Control to generate, create Code 3 of 9 image in Office Word applications.
www.OnBarcode.com
So what does this code actually do Like any header file, you are using this to declare outlets, variables, and methods that you will later implement in the counterpart .m file.
EAN128 Reader In C#
Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Generator In Java
Using Barcode generation for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
CHAPTER 3: Interface Builder
The features that you are introducing here require you to manage a string (actually a NSAttributedString, reflecting the potentially rich nature of the content). You need to get and set that string, and the place where the string is placed is the Text View, which is why you are creating an outlet for it. To identify the Text View to the controller, you need to create a new outlet for the Text View, and you will also need an instance variable to hold the data that will go in it. The @property statements replace the method signatures for the accessor and mutator methods in Objective-C 2.0 simply use this statement in the header file and the synthesize command in the implementation file, and you can forget about getter and setter methods. The next stage is to implement the various methods in MyDocument.m. The method stubs are there already you are just going to flesh them out. Find the method called windowControllerDidLoadNib. As the name suggests, this method is run when the user interface is loaded, and its purpose is to populate the Text View. Add the code shown in bold in Listing 3 6.
Listing 3 6. Adding content to the Text View when the NIB loads - (void)windowControllerDidLoadNib:(NSWindowController *) aController { [super windowControllerDidLoadNib:aController]; if (self.string != nil) { [[textView textStorage] setAttributedString:self.string]; } }
This means set the value of the textStorage property of the Text View to be the value of the attributed string property of the current object (the window as you will see shortly, the window is a delegate of the Text View). Now you need to add the actual code for reading and writing. First let s look at writing the data. The stub method you will be editing is dataOfType (see Listing 3 7). Add the code in bold to make your method look like this:
Listing 3 7. Editing dataOfType - (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError { NSData *data; self.string = textView.textStorage; data = [NSArchiver archivedDataWithRootObject:self.string]; return data; }
Note that this listing has removed the comments and unused boilerplate from the stub code. Make the appropriate changes to the method for reading archived data (Listing 3 8):
Listing 3 8. Editing readFromData: - (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError { NSAttributedString *tempString = [NSUnarchiver unarchiveObjectWithData: data];
Copyright © OnBarcode.com . All rights reserved.