摘要：
错误检查和代码重查Troubleshooting and Reviewing the Code如果你的应用不能正确运行，尝试问题-解决路径。如果你的应用还是没有运行，将你的代码与本章最后的列表对照一下。If you are having trouble getting your app to work correctly, try the problem-solving approaches described in this chapter. If your app still isn’t working as it should, compare your code with the li 阅读全文
摘要：
完成/实现视图控制器Implementing the View Controller实现视图控制器分为以下几部分：为用户名字符串标签添加一个属性；完成 changeGreeting:方法；确保用户点击输入键盘的 完成(Done)按钮时，键盘解除。There are several parts to implementing the view controller: You need to add a property for the user’s name, implement the changeGreeting: method, and ensure that the keyboard i 阅读全文