free barcode generator c# code Introducing the iPhone in Objective-C

Make QR Code 2d barcode in Objective-C Introducing the iPhone

Introducing the iPhone
Printing QR Code 2d Barcode In Objective-C
Using Barcode printer for iPhone Control to generate, create QR Code image in iPhone applications.
www.OnBarcode.com
Draw Code 128B In Objective-C
Using Barcode creator for iPhone Control to generate, create Code 128 Code Set B image in iPhone applications.
www.OnBarcode.com
Understanding iPhone input and output
Making EAN / UCC - 14 In Objective-C
Using Barcode generation for iPhone Control to generate, create UCC.EAN - 128 image in iPhone applications.
www.OnBarcode.com
Encoding Data Matrix ECC200 In Objective-C
Using Barcode maker for iPhone Control to generate, create Data Matrix image in iPhone applications.
www.OnBarcode.com
Although an iPhone has a native screen resolution of 480x320 pixels, web viewers won t see web pages laid out at that resolution. An iPhone allows a user to touch and tap around pages in a way somewhat similar to mousing, but it provides notable differences from a mouse interface. These differences highlight the final notable elements in the story of what makes the iPhone unique.
Code 39 Maker In Objective-C
Using Barcode generator for iPhone Control to generate, create Code 39 Extended image in iPhone applications.
www.OnBarcode.com
UPC-A Maker In Objective-C
Using Barcode drawer for iPhone Control to generate, create GTIN - 12 image in iPhone applications.
www.OnBarcode.com
Output and iPhone viewport
Making QR Code In Objective-C
Using Barcode maker for iPhone Control to generate, create QR-Code image in iPhone applications.
www.OnBarcode.com
EAN8 Creation In Objective-C
Using Barcode generator for iPhone Control to generate, create GTIN - 8 image in iPhone applications.
www.OnBarcode.com
When using the iPhone for most purposes, you may note that it has a 480x320 screen that displays very clearly. This is not a far cry from the 640x480 video displays common on desktop computers in the late 1980s, albeit with more colors and crispness than those early EGA and VGA displays. Thus, as we mentioned when discussing the slower speeds of the wide-area network, we can again fall back on the lessons of the past when developing for the iPhone. The iPhone s display becomes interesting when it s used to view web pages, because the 480x320 display doesn t show web pages at that size. Instead, by default a user looks at a web page that has been rendered at a resolution of 980 pixels (with a few exceptions, as we ll note when talking about web development). In other words, it s as if users pulled a web browser up on their computer screen that was 980 pixels wide, and then scaled it down by a factor of either 2:1 or 3:1 depending on the orientation of the iPhone to display at either 480 or 320 pixels wide. This scaled view is what the iPhone calls a viewport. As you ll see, viewport size can be set by hand as part of a web page design, forcing a page to scale either more or less when it s translated onto the iPhone. However, for any web page without an explicit viewport command, the 980-pixel size is the default. Realizing that most pages will scale by a factor of at least two is vital to understanding how web pages will look on an iPhone. In short, everything will be really, really small. As a result, good web development for the iPhone depends on ensuring that words and pictures appear at a reasonable size despite the scaling. We ll talk about how to do that using the viewport command, CSS tricks, and other methods in chapter 3. And for SDK developers: note this is an issue for you as well, since the SDK s UIWebView class scales the screen just like mobile Safari does. We ll see the first example of this in chapter 11.
Scanning QR Code ISO/IEC18004 In Visual C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Encode QR Code In Objective-C
Using Barcode generation for iPhone Control to generate, create QR-Code image in iPhone applications.
www.OnBarcode.com
Output and orientations
Reading EAN 128 In VB.NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
UCC.EAN - 128 Drawer In Objective-C
Using Barcode generation for iPad Control to generate, create UCC.EAN - 128 image in iPad applications.
www.OnBarcode.com
We need to consider one other important element when thinking about the iPhone output: its ability to display in two different orientations, 480x320 or 320x480. Each orientation has its own advantages. The portrait orientation is great for listings, while the landscape orientation is often easier to read. Each of these orientations also shows off the iPhone s chrome in a different way. This chrome will vary from one SDK program to another, but it s consistent when view-
Barcode Generator In None
Using Barcode drawer for Excel Control to generate, create Barcode image in Excel applications.
www.OnBarcode.com
QR Code 2d Barcode Reader In .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Understanding iPhone input and output
ECC200 Creator In Java
Using Barcode drawer for BIRT Control to generate, create DataMatrix image in BIRT applications.
www.OnBarcode.com
GTIN - 128 Maker In Java
Using Barcode drawer for Java Control to generate, create EAN 128 image in Java applications.
www.OnBarcode.com
status bar: 20px URL bar: 60px status bar: 20px URL bar: 60px
Drawing EAN / UCC - 13 In Java
Using Barcode printer for Android Control to generate, create GS1-128 image in Android applications.
www.OnBarcode.com
2D Barcode Drawer In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create 2D image in ASP.NET applications.
www.OnBarcode.com
visible area: 320x356
Generating Barcode In Java
Using Barcode creator for BIRT Control to generate, create Barcode image in Eclipse BIRT applications.
www.OnBarcode.com
Painting UPC-A In Visual Studio .NET
Using Barcode creator for Reporting Service Control to generate, create UCC - 12 image in Reporting Service applications.
www.OnBarcode.com
visible area: 480x208
bottom bar: 32px Landscape Mode bottom bar: 44px Portrait Mode
Figure 1.1 The iPhone supports two dramatically different views, landscape and portrait. Choosing between them is not just a question of which is easier to read, but also requires thinking about how much of each view is taken up by toolbars and other chrome. Mobile Safari is used here as an example of how much room the chrome takes up in each display.
ing web pages in Safari, and thus we can use the latter as an example of orientation s impact on chrome, as shown in figure 1.1. One of the interesting facts shown by this picture is that the web chrome takes up a larger percentage of the iPhone screen in the landscape mode than in the portrait mode. This is summarized in table 1.3.
Mode Portrait Landscape Chrome % with URL 26% 35% Chrome % without URL 13% 16% Table 1.3 Depending on an iPhone s orientation, you ll have different amounts of screen real estate available.
The difference between the orientations isn t nearly as bad without the URL bar, which scrolls off the top of the screen as users move downward, but when users first call up a web page on the iPhone in landscape mode, they ll only get to see a small percentage of it. You ll see similar issues in your SDK development too, particularly if you re creating large toolbars for your applications. Despite this limitation of landscape mode, many of the best applications will likely shine in that layout, as the built-in YouTube application shows. With discussions of viewports and orientations out of the way, we ve highlighted the most important unique elements of the iPhone output, but its input may be even more innovative.
Copyright © OnBarcode.com . All rights reserved.