斯坦福大学公开课：iOS 7应用开发 笔记

这是观看网易公开课 Mehran Sahami教授的<斯坦福大学公开课:编程方法学>后的随笔. 目前只看到第三次课,<Karel与Java>,我的收获有以下要点: 1.软件工程跟普通的写代码是不同的.软件应该考虑很多东西,比如:可移植性.便于升级维护等等,而不仅仅是写出代码实现功能那么简单. 2.代码是写给机器执行的,但更重要的是人要让人能看懂.(代码后期维护等等的工作量或者时间是写代码的10倍及更多,所以让代码更规范更易被人读懂很重要) 3.准确定义一个函数.一个类.一个包的功能

继续学习公开课 第二节课做了一个简单的计算器作为例子.大概Touch了如下知识点: 讲解了XCode4,我看了一下最新下载的是XCode8了. XCode创建工程, singleViewApplication还是有的,界面对比起XCode4来,更简洁些了,操作跟视频讲解里的差不多. 体会了下第一节课讲的MVC View的代码看不到这个感觉不太爽,特别是前面操作是将number的button拷贝到了 operation的 button,结构导致operation button也都连接到了digit

1.One is CGFloat.It’s a floating point number.All floating point numbers that have to do with drawing on the screen or getting touch events or whatever are CGFloats.This might be a double.It might be just a regular floating point number.Not only usin

1.All objects in an array are held onto strongly in the heap.So as long as that array itself is in the heap,as long as someone has a strong pointer to the array itself,all the objects the are in the array will stay in the heap as well.Because it has

1.Now,this line of code could cause trouble.If self.image is nil,because I told you that if you have a method,this is just a getter of the image that returns a struct,and you send it to nil,you’ll get undefined results.(47:00) 2.Zomming in,really sim

1.Abstract means that this class cannot be instantiated and used,it’s only useful as a superclass for other classes that are concrete. (04:00) 2.And I also like to document,even on my implementation any methods that basically are abstract.Any method

1.There is a class called NSNotificationCenter .It has a class method called defaultCenter.That returns a shared instance kind of like NSUserDefault,standard UserDefault did — a shared instance.That’s the object you use to tune into radio stations. A

1.The difference is card.h is the public API.That’s what your dot h is.It’s your public API.It’s what methods in your class you want to make public so that other people can call them.Card.m is your private API and all your implementation. 2.It’s impo

1. 2. 3.UITableView Protocols:How do we connect to all this stuff in our code?Via the UITableView’s datasource and delegate. The delegate is used to control how the table is displayed. The dataSource provides the data what is displayed inside the cel