Titlebook: Beginning iPhone 4 Development; Exploring the iOS SD Dave Mark,Jack Nutting,Jeff LaMarche Book 2011 -- 2011

食道

Multiview Applications,power of the iOS platform emerges when you can switch out views based on user input. Multiview applications come in several different flavors, but the underlying mechanism is the same, regardless of how it may appear on the screen.

壕溝

Tab Bars and Pickers,rent tabs and five different content views. Building this application will reinforce a lot of what you learned in Chapter 6. Now, you’re too smart to spend a whole chapter doing stuff you already sort of know how to do, so we’re going to use those five content views to demonstrate a type of iOS cont

orient

Introduction to Table Views,pplication will allow the user to drill down into nested lists of data and edit that data. But before we can build that application, you need to master the concept of table views. And that’s the goal of this chapter.

Contracture

iPad Considerations,re’s very little that differentiates a 3G iPad from an iPhone, or a Wi-Fi iPad from an iPod touch. In spite of the fundamental similarities between iPhone and iPad, from the user’s point of view these devices are really quite different. Fortunately, Apple had the good sense to recognize this fact fr

TAG

Application Settings and User Defaults,tem is usually found in the application menu. Selecting it brings up a window where the user can enter and change various options. The iPhone and other iOS devices have a dedicated application called Settings, which you no doubt have played with any number of times. In this chapter, we’ll show you h

卷發(fā)

催眠藥

大方一點(diǎn)

Taps, Touches, and Gestures,ering. The multitouch screen common to all iOS devices is one of the key factors in the platform’s tremendous usability. Because the screen can detect multiple touches at the same time and track them independently, applications are able to detect a wide range of gestures, giving the user power that

工作

Where Am I? Finding Your Way with Core Location,hat Core Location can leverage to do this: GPS, cell tower triangulation, and Wi-Fi Positioning Service (WPS). GPS is the most accurate of the three but is not available on first-generation iPhones, iPod touches, or Wi-Fi-only iPads; in short, any device with a 3G data connection also contains a GPS

黃瓜

Whee! Gyro and Accelerometer!,ng held and if it’s being moved. iOS uses the accelerometer to handle autorotation, and many games use it as a control mechanism. It can also be used to detect shakes and other sudden movement. This capability is extended even further with iPhone 4, which also includes a built-in gyroscope that lets