摘要：
Chapter 23 Core Data1. Core Data is only able to store certain data types in its store, and UIImage is not one of these types. Instead, you declared t... 阅读全文
摘要：
Chapter 21 WebServices and UIWebView1. Usually, fetch data from a web server using four handy classes: NSURL, NSURLRequest, NSURLSessionTask, and NSUR... 阅读全文