Titlebook: Beginning iPhone Development with Swift 3; Exploring the iOS SD Molly Maskrey,Kim Topley,JEFF LAMARCHE Book 20163rd edition Molly Maskrey,

BOLUS

Using Tab Bars and Pickers,n. You use them to input dates in the Calendar application or to set a timer in the Clock application, as shown in Figure 7-1. It is not quite as common on an iPad, since the larger display lets you present other ways of choosing among multiple items, but even there, it’s used by the Calendar application.

嚴重傷害

Collection Views,e a UITableView scroll its content horizontally. In general, much of the power of UITableView came with a particular trade-off: developers have no control of the overall layout of a table view. You define the look of each individual cell, but the cells are just going to be stacked on top of each other in one big scrolling list.

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Determining Location,ing Service (WPS). GPS provides the most accurate positioning of the three technologies, but it is not available on first-generation iPhones, iPod touches, or Wi-Fi-only iPads. In short, any device with at least a 3G data connection also contains a GPS unit. GPS reads microwave signals from multiple satellites to determine the current location.

BET

Creating a Multiview Application,wer of the iOS platform emerges when you switch out views based on user input. Multiview applications come in several different flavors, but the underlying mechanism functions the same, regardless of how the app appears on the screen. In this chapter, we’ll focus on the structure of multiview applic

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Using Tab Bars and Pickers,cation with five different tabs and five different content views. Building this application reinforces a lot of what we covered in Chapter 6. We’ll use those five content views to demonstrate a type of iOS control not yet covered, a picker view, or just a picker. You may not be familiar with the nam

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