如何从 Xcode 中的相同共享代码创建多个应用程序？
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How to create multiple apps from same shared code in Xcode?
提问by Slee
I'm developing 2 different apps that share 95% of the same code and views. What is the best way to go about this using Xcode?
我正在开发 2 个不同的应用程序，它们共享 95% 的相同代码和视图。使用 Xcode 解决此问题的最佳方法是什么？
回答by AliSoftware
Use targets. That's exactly what they are for.
使用目标。这正是他们的目的。
Learn more about the concept of targets here.
Typically, the majority of projects have a single Target, which corresponds to one product/application. If you define multiple targets, you can:
通常，大多数项目都有一个 Target，它对应于一个产品/应用程序。如果定义多个目标，则可以：
- include some of your source code files (or maybe all) in both targets, some in one target and some in the other
- you can play with Build Settings to compile the two targets using different settings.
- 在两个目标中都包含一些（或全部）源代码文件，一些在一个目标中，一些在另一个目标中
- 您可以使用构建设置来使用不同的设置编译两个目标。
For example you may define Precompiler Macros for one target and other macros for the other (let's say OTHER_C_FLAGS = -DPREMIUMin target "PremiumVersion" and OTHER_C_FLAGS = -DLITEto define the LITEmacro in the "LiteVersion" target) and then include similar code in your source:
例如，您可以为一个目标定义预编译器宏，为另一个目标定义其他宏（假设OTHER_C_FLAGS = -DPREMIUM在目标“PremiumVersion”中并在“LiteVersion”目标中OTHER_C_FLAGS = -DLITE定义LITE宏），然后在源中包含类似的代码：
-(IBAction)commonCodeToBothTargetsHere
{
...
}
-(void)doStuffOnlyAvailableForPremiumVersion
{
#if PREMIUM
// This code will only be compiled if the PREMIUM macro is defined
// namely only when you compile the "PremiumVersion" target
.... // do real stuff
#else
// This code will only be compiled if the PREMIUM macro is NOT defined
// namely when you compile the "LiteVersion" target
[[[[UIAlertView alloc] initWithTitle:@"Only for premium"
message:@"Sorry, this feature is reserved for premium users. Go buy the premium version on the AppStore!"
delegate:self
cancelButtonTitle:@"Doh!"
otherButtonTitles:@"Go buy it!",nil]
autorelease] show];
#endif
}
-(void)otherCommonCodeToBothTargetsHere
{
...
}
