#ifdef #else #endif选择iOS sdk版本和功能？ [英] #ifdef #else #endif choose iOS sdk version and function?

问题描述

我正在建造一个黑暗主题的iOS 6和7应用程序。我知道我可以调用 [[UIApplication sharedApplication] setStatusBarStyle：UIStatusBarStyleLightContent]; 来使iOS 7状态栏适合深色主题应用。

I am buliding a dark themed iOS 6 and 7 app. I understand I can call [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; to make the iOS 7 status bar suit a dark color theme application.

问题是我要将我的应用程序提交到App Store，目前Xcode 5尚未准备就绪，所以我必须使用Xcode 4.6.x来完成这项任务。但是使用Xcode 4.6，我无法从iOS 7编译新方法。我想我必须做类似如果ios7然后执行 [[UIApplication sharedApplication] setStatusBarStyle：UIStatusBarStyleLightContent]; 并重新定位我的应用程序窗口。

The problem is I am going to submit my app to the App Store and currently Xcode 5 is not ready for that, so I have to use Xcode 4.6.x to do this task. However with Xcode 4.6, I am not able to compile the new method from iOS 7. I think I have to do something like ""if ios7"" then do [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; and reposition my application window.

我试图用 #ifdef ... #else ...
此代码 [[UIApplication sharedApplication] setStatusBarStyle：UIStatusBarStyleLightContent]; 在 viewDidLoad 。

I am trying to do this with #ifdef ... #else... this code is [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; inside the viewDidLoad.

任何人都可以帮助理解如何在某些函数中使用 #ifdef ... ...

Could anyone help to understand how to use #ifdef... with the method in some functions.

非常感谢!!!!

推荐答案

虽然我'我不是100％肯定我可以在不违反保密协议的情况下完全回答这个问题，我会尽力指出你正确的方向。

While I'm not 100% sure I can fully answer this without breaching NDA, I'll do my best to point you in the right direction.

你需要使用 __ IPHONE _ * 在Availability.h中的#defines

You need to use the __IPHONE_* #defines in Availability.h

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_6_0
  // iOS 6+ code here
#else
  // Pre iOS 6 code here
#endif

请注意 #if 和 #ifdef 将确定什么代码编译，它不是运行时检测机制。

Please be aware that #if and #ifdef will determine what code is compiled, it is not a runtime detection mechanism.

您可以通过快速使用Open并键入可用性轻松访问Availability.h 。

You can easily access Availability.h by using Open Quickly and typing in Availability.

这篇关于#ifdef #else #endif选择iOS sdk版本和功能？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！