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Thiết kế trải nghiệm người dùng iphone - p 6

This page intentionally left blank Download from www.wowebook.com iPhone Device Overview THIS CHAPTER WILL EXPLORE the iPhone device with an emphasis on the technologies and hardware that define the iPhone user experience, such as the multi-touch display, motion sensors, and location information. In addition to explaining what’s possible with the device, this chapter will provide best practices based on recognized usability principles and Apple’s iPhone Human Interface Guidelines. Following these best practices will make your app easier to use and may expedite its approval in the App Store. At the conclusion of this chapter, you will understand how the iPhone’s features can improve. | This page intentionally left blank Download from www.wowebook.com iPhone Device Overview THIS CHAPTER WILL EXPLORE the iPhone device with an emphasis on the technologies and hardware that define the iPhone user experience such as the multi-touch display motion sensors and location information. In addition to explaining what s possible with the device this chapter will provide best practices based on recognized usability principles and Apple s iPhone Human Interface Guidelines. Following these best practices will make your app easier to use and may expedite its approval in the App Store. At the conclusion of this chapter you will understand how the iPhone s features can improve the user experience of your app. You may also be inspired to explore and combine these features in innovative ways. 2 19 Download from www.wowebook.com Reviewing the iPhone and iPod Touch s Features On the surface the iPhone and iPod Touch look like simple devices but upon closer inspection their power and sophistication cannot be denied. Inside these devices are capacitive systems that support the multi-touch display as well as other sensors that detect light motion and direction. They are also packed with plenty of storage space RAM and a GPU graphical processing unit capable of rendering OpenGL Open Graphics Library graphics. In this chapter we ll review several features that are central to the user experience of many iPhone apps. Keep in mind that this list is constantly evolving. Visit the Apple web site for the most up-to-date information on both the iPhone1 and iPod Touch.2 Features reviewed in this chapter include The Device Capabilities Framework One addition you ll find in the iPhone 3.0 SDK and later is the Device Capabilities Framework.3 This framework enables developers to detect which device the app is being run on as well as what sort of tasks the device can perform. For example let s say that you ve built an app for tracking your cycling activity. The app makes use of the GPS