• Workspace - Contains one or more projects. These projects usually relate to one another
• Project - Contains code and resources, etc. (You'll be used to these!)
• Target - Each project has one or more targets.
  • Each target defines a list of build settings for that project
  • Each target also defines a list of classes, resources, custom scripts etc to include/ use when building.
  • Targets are usually used for different distributions of the same project.
    • For example, my project has two targets, a "normal" build and an "office" build that has extra testing features and may contain several background music tracks and a button to change the track (as it currently does).
    • You'll be used to adding classes and resources to your default target as you add them.
    • You can pick and choose which classes / resources are added to which target.
      • In my example, I have a "DebugHandler" class that is added to my office build
    • If you add tests, this also adds a new target.
• Scheme - A scheme defines what happens when you press "Build", "Test", "Profile", etc.
  • Usually, each target has at least one scheme
  • You can autocreate schemes for your targets by going to Scheme > Manage Schemes and pressing "Autocreate Schemes Now"

例如在SwiftReduxExample中，SwiftReduxExample是一个project，他有一个target：SwiftReduxExample

而在Redux这个Package中（Package其实也是一个Project），共有Redux和ReduxTest两个target，而Scheme是用来指定Build，Run，Test，Profile，Analyze，Archive的行为的，例如在build里，指定的行为是执行Redux target的所有行为，而只执行ReduxTests的test；Test里，则只需要执行ReduxTest里面的文件。

Targets with Scheme

manage Schemes

create Schema

一个Project可以有多个target用来生成不同的product，而target必须给它创建对应的Scheme才可以进行编译打包测试等等操作，只有创建了Scheme的target的才会显示在Xcode中间的那个Scheme框中，从而对target进行编译打包测试等等操作。