摘要： Adding PolishPresentation is a critical component of a successful MacOSX app. Although the app behaves “correctly” now, there are a couple more changes you can make to improve the overall polish.演示是一个成功的Mac OS X应用程序的重要组成部分。尽管应用程序现在能很正确地(correctly)运行，但是我们还能做更多改变来使应用更完美。Add a Number Formatter添加数字格式化If 阅读全文

摘要： Implementing Action Methods实现动作方法The app delegate’s action methods need to synchronize the audio track volume that the user sets in one UI element with the values displayed by other UI elements. When the user clicks the Mute button, the track volume displayed by the text field and slider should be s 阅读全文