摘要： [Text Relatives II] When your app determines that the user has requested the edit menu—which could be the action of making a selection—you should complete the following steps to display the menu:Call thesharedMenuControllerclass method ofUIMenuControllerto get theglobalmenu-controller instance.Comp. 阅读全文

摘要： [Text Relatives] With TextKit the resources at your disposal range fromframeworkobjects—such as text views, text fields, and web views—to text layout engines that you can use directly to draw, lay out, and otherwise manage text.Underlying the text views in UIKit is a powerful layout engine called T. 阅读全文

摘要： [CoreText] Core Text is designed for development of higher-level text-handling frameworks. General app developers should use Text Kit in iOS (seeText Programming Guide for iOS).Core Text mediates between text layout and font support provided by higher level frameworks and the low-level capabilities. 阅读全文