iOS Programming Views :Redrawing and UIScrollView  1.1 event  You are going to see how views are redrawn in response to an event. 你将看到view如何响应event的. You declared properties in header files. You can also declare properties in class extensions. 你可以声明属…

1. Views A view (an object whose class is UIView or a subclass of UIView) knows how to draw itself into a rectangular area of the interface. Your app has a visible interface thanks to views. (eg: you can drag an interface widget, such as a UIButton,…

Next About iOS Collection Views 关于iOS Collection Views A collection view is a way to present an ordered set of data items using a flexible and changeable layout. The most common use for collection views is to present items in a grid-like arrangement,…

iOS Programming State Restoration 状态存储 If iOS ever needs more memory and your application is in the background, Apple might kill it to return memory to the system. 如果iOS 需要更多的memory,你的应用在后台,apple 可能杀死它来得到更多的内存给系统. This should be transparent to your u…

iOS Programming Autorotation, Popover Controllers, and Modal View Controllers  自动旋转,Popover 控制器,Modal view controller  1.  In this chapter, you are going to make four changes to Homepwner's behavior that will tailor the app's behavior to whatever dev…

iOS Programming Controlling Animations 动画 The word "animation" is derived from a Latin word that means "the act of bringing to life." Animations are what bring your applications to life, and when used appropriately, they can guide your…

iOS Programming UIStoryboard In this chapter, you will use a storyboard instead. Storyboards are a feature of iOS that allows you to instantiate and lay out all of your view controllers in one XIB-like file. Additionally, you can wire up view control…

iOS Programming UISplitViewController  The iPad, on the other hand, has plenty of screen space to present both views using a built-in class called UISplitViewController. iPad 有足够的屏幕空间来展现两个view用built-in 类称为UISplitViewController. UISplitViewController…

iOS Programming Dynamic Type  2       You will need to update two parts of this view controller for Dynamic Type: the rows of your table view will grow or shrink in response to the user changing the preferred text size, and the BNRItemCell will need…

iOS Programming Dynamic Type 1  Dynamic Type is a technology introduced in iOS 7 that helps realize this goal by providing specifically designed text styles that are optimized for legibility. Dynamic Type 是从iOS7引入的技术来帮助实现这个目标通过提供专门设计的text styles 为了优化…