巴山夜雨1989

摘要： Objective-C Protocols 1.1 Formal Protocols A formal protocol (like an informal protocol) is a named list of methods and properties. formal protocol （像informal protocol）是一系列方法和属性的名字列表。 However, a ... 阅读全文

摘要： Objective -C Categories The dynamic runtime dispatch mechanism employed by Objective-C lets you add methods to existing classes. 被Objective -C 采纳的动态运行分配机制让你可以在已有的类中添加方法。 1.1 Creating a Category 创建... 阅读全文

摘要： Objective-C Properties Apple introduced properties, a combination of new compiler directivesand a new attribute accessor syntax. Apple 引入了属性这一概念。新的编译器命令和新的属性存取句法。 1.1 Shrinking the Interface 减少interfa... 阅读全文

摘要： iOS programming UITabBarController 1.1View controllers become more interesting when the user's actions can cause another view controller to be present... 阅读全文

摘要： iOS Programming View Controllers 视图控制器 1.1 A view controller is an instance of a subclass of UIViewController. 一个view controller 是一个UIViewController的子类。 A view controller manages a view hierarchy. ... 阅读全文

摘要： 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 ca... 阅读全文

摘要： iOS Programming View and View Hierarchy 视图和视图等级 1.1（1）File → New → Project.. From the iOS section, select Application, choose the Empty Application template, and click Next. 1.2 View Basics (1... 阅读全文

摘要： Objective -C Object initialization对象初始化 1.1 Allocating Objects分配对象 Allocation is the process by which a new object is born. allocation是新对象诞生的过程。 Sending the alloc message to a class ca... 阅读全文

摘要： Objective-C Memory Management Being Exceptional 异常处理与内存 3.1Cocoa requires that all exceptions must be of type NSException cocoa需要所有的异常是NSException类型的。 so even though you can throw an exc... 阅读全文

摘要： Objective-C Memory Management内存管理 2 2.1 The Rules of Cocoa Memory Management 内存管理规则 （1）When you create an object using new, alloc, or copy, the object has aretain count of 1. You are respon... 阅读全文