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iOS 9，Swift 2.0，Xcode和测试

[英]iOS 9, Swift 2.0 , Xcode and testing

原文 2015-06-10 16:26:39 1 1 ios/ objective-c/ swift

I am planning to learn to develop iOS apps. 我打算学习开发iOS应用程序。 I'll most probably be learning Objective-C only for now and would like to develop some actual apps for iOS. 我很可能现在只学习Objective-C，并希望为iOS开发一些实际的应用程序。

Now, with the launch of Swift 2.0, will Objective-C apps still run on iOS9 ? 现在，随着Swift 2.0的推出，Objective-C应用程序仍将在iOS9上运行吗？ Also, is it possible to test run an Objective-C app on your phone like mentioned here ? 此外，是否可以测试在手机上运行Objective-C应用程序，如此处所述？ https://developer.apple.com/xcode/ Or is this facility available only for apps written in Swift? https://developer.apple.com/xcode/或者此工具仅适用于使用Swift编写的应用程序？

Does Swift allow me to do everything that Objective-C does? Swift允许我做Objective-C的所有工作吗？

Any further advide or guidance for what should I know before enrolling for the course will be appreciated to help me judge things better. 在报名参加课程之前，我应该知道的任何进一步的建议或指导，将有助于我更好地判断事情。

1 个解决方案

Swift is still just the second language. 斯威夫特仍然只是第二语言。 All Cocoa frameworks are written in C or Obj-C (maybe the new ones in iOS 9 are written in Swift). 所有Cocoa框架都是用C或Obj-C编写的（也许iOS 9中的新框架是用Swift编写的）。

The language in which an application is written doesn't matter, the code is compiled into the same machine code, so yes, Obj-C apps will continue to run and many developers won't bother with Swift. 编写应用程序的语言无关紧要，代码编译成相同的机器代码，因此，Obj-C应用程序将继续运行，许多开发人员不会打扰Swift。 Apps that have been already written will not have to be rewritten to Swift (with some exceptions). 已编写的应用程序不必重写为Swift（有一些例外）。

Swift won't allow you to do absolutely everything that Obj-C does but it will allow you to do almost everything and the code will be probably more robust, considering that Swift is more modern language with stronger typing than Obj-C. Swift不会允许你完成Obj-C所做的一切，但它会让你做几乎所有的事情而且代码可能会更强大，考虑到Swift是一种比Obj-C更强的打字的现代语言。 If you are a beginner, you won't probably find any problematic use case. 如果您是初学者，您可能不会发现任何有问题的用例。