vb.net barcode printing 7: Core Data Basics in Java

Drawer Data Matrix in Java 7: Core Data Basics

CHAPTER 7: Core Data Basics
Data Matrix Creation In Java
Using Barcode printer for Android Control to generate, create Data Matrix image in Android applications.
www.OnBarcode.com
Printing Code 128B In Java
Using Barcode maker for Android Control to generate, create Code 128C image in Android applications.
www.OnBarcode.com
In the Library, search for numberformatter, and drag the resulting NSNumberFormatter (a subclass of NSFormatter) to the small label, which highlights when you re right on top of it. Then select the formatter by first selecting the small label in the window, then clicking on the tiny icon that appears below it. That icon represents the formatter, which is attached to the control, and clicking on it lets you edit the formatter s attributes. Now bring up the Attributes Inspector, and see what the options for NSNumberFormatter look like. You get a whole host of options for defining how the formatter will display numbers, including how many digits to display after a decimal point, what the decimal and thousands separators look like, currency symbols, and so on. You don t actually need to configure anything in there right now, since the default values for an NSNumberFormatter are just right for our purposes: By default, NSNumberFormatter will round any value to the nearest integer. Now select both the slider and the small label and duplicate them twice, once for divinity and once for goodness, placing the new sets in line with the labels. Figure 7 10 shows what you should be seeing at this point.
Create Barcode In Java
Using Barcode creator for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Barcode Creator In Java
Using Barcode printer for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Figure 7 10. Replacing text fields with sliders
European Article Number 13 Maker In Java
Using Barcode generator for Android Control to generate, create EAN13 image in Android applications.
www.OnBarcode.com
Code 39 Creator In Java
Using Barcode encoder for Android Control to generate, create Code39 image in Android applications.
www.OnBarcode.com
Now for the final step: binding the new controls to the selected MythicalPerson s values. One at a time, select each of these six objects (three sliders and three labels), and bind its Value so that the Mythical Person Array Controller is the controller, selection is the Controller Key, and the appropriate attribute power, divinity, or goodness is selected in the Model Key Path combo box. Save your work, switch to Xcode, and click the Build & Run button. Running the app, you should see the sliders and text fields update as you select objects in the table, and dragging a slider should update both the corresponding text field and the matching cell in the table view. If you play around with the app a bit more, trying out the search field above the table view, you may be in for a rude awakening, and find that your app hangs or crashes, and dumps a lot of strange output into the console log in Xcode. The problem lies with the search field that the assistant creates: it s automatically bound up with several search predicates, one for each attribute. These search predicates (which you ll be seeing more of in 9) are used to try to match up the value that the user types in with objects in the data store. The assistant-created GUI includes a search predicate for every attribute, including the binary depiction attribute. Unfortunately, binary and transformable attribute are inherently not searchable, and Core Data tries to deal with the mess up as well as it can, but unfortunately it doesn t help. The search functionality is inoperable with a search predicate for the depiction attribute in place. Fortunately, you can make searching work for your project by removing the offending search predicate. Use the Bindings Inspector to examine the search field s bindings. In
DataMatrix Generation In Java
Using Barcode generator for Android Control to generate, create Data Matrix 2d barcode image in Android applications.
www.OnBarcode.com
Generating Code 2/5 In Java
Using Barcode printer for Android Control to generate, create Code 2 of 5 image in Android applications.
www.OnBarcode.com
CHAPTER 7: Core Data Basics
Scanning Data Matrix 2d Barcode In Visual Studio .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Data Matrix Generator In Visual Studio .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
the "Search" category, you ll see a bunch of numbered Predicate bindings. Open each one until you find the one for "depiction," then just deactivate that binding. Unfortunately, even though we wrote that paragraph as if it what we described actually works, it doesn t quite work if you re running Leopard. Turning off the checkbox for Predicate5 (containing the search predicate binding for the depiction attribute) in a list of 8 predicates (the last one being empty, ready to add a new one if need be) actually eliminates Predicate7 instead! This is clearly a bug in Interface Builder. You could work around it by eliminating the last three predicates, and then re-adding in the last two, but for our purposes, it s enough to just eliminate the last three predicates and not bother putting the last two back in place for now. You ve now made a pretty cool-looking app entirely by defining a model, dragging an entity into Interface Builder, and then adjusting and swapping out some controls in the GUI. This is a great example of the kind of visual programming model that Cocoa has always enabled, and with the addition of Cocoa Bindings and Core Data in the past few years it s become even more complete. Of course, underlying all this stuff are frameworks and APIs that enable all this magic to happen in Xcode and Interface Builder, and there are times when you will want or need to access Core Data functionality from code. The rest of this chapter will introduce you to some aspects of programming (in the traditional, code-based sense) with Core Data.
Code 39 Full ASCII Maker In None
Using Barcode printer for Software Control to generate, create USS Code 39 image in Software applications.
www.OnBarcode.com
European Article Number 13 Generation In Objective-C
Using Barcode drawer for iPhone Control to generate, create European Article Number 13 image in iPhone applications.
www.OnBarcode.com
Matrix Creator In Visual C#.NET
Using Barcode drawer for .NET framework Control to generate, create Matrix Barcode image in VS .NET applications.
www.OnBarcode.com
PDF 417 Reader In Visual C#.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Recognize ECC200 In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Making Matrix In Java
Using Barcode drawer for Java Control to generate, create Matrix image in Java applications.
www.OnBarcode.com
EAN / UCC - 13 Printer In None
Using Barcode generation for Office Word Control to generate, create UCC - 12 image in Office Word applications.
www.OnBarcode.com
Data Matrix ECC200 Printer In Java
Using Barcode maker for BIRT reports Control to generate, create DataMatrix image in BIRT reports applications.
www.OnBarcode.com
Code 39 Full ASCII Creation In Visual C#.NET
Using Barcode generator for .NET framework Control to generate, create Code-39 image in Visual Studio .NET applications.
www.OnBarcode.com
UCC.EAN - 128 Printer In Java
Using Barcode generation for Eclipse BIRT Control to generate, create GTIN - 128 image in Eclipse BIRT applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.