Chapter     4

More User Interface Fun

In Chapter 3, we discussed MVC and built an application using it. You learned about outlets and actions, and you used them to tie a button control to a text label. In this chapter, we’re going to build an application that will take your knowledge of controls to a whole new level.

We’ll implement an image view, a slider, two different text fields, a segmented control, a couple of switches, and an iOS button that looks more like, well, an iOS button. You’ll see how to set and retrieve the values of various controls. You’ll learn how to use action sheets to force the user to make a choice, and how to use alerts to give the user important feedback. You’ll also learn about control states and the use of stretchable ...

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