What the difference between static and dynamic libraries in IOS ?

     In iOS, static and dynamic libraries are both used to package and distribute reusable code that can be included in other applications or libraries. However, there are some key differences between the two:

 Static libraries: Static libraries are compiled code that is linked directly to an application at compile time. This means that all the code in the library is included in the final executable file of the application. Static libraries are typically smaller in size than dynamic libraries because they do not contain any runtime linking information. They also offer better performance because all the code is already loaded into memory when the application starts.

 Dynamic libraries: Dynamic libraries are compiled code that is linked at runtime. This means that the library is separate from the application and is loaded into memory only when it is needed. Dynamic libraries are typically larger in size than static libraries because they contain runtime linking information. They also offer more flexibility because they can be updated independently of the application, which means that bug fixes and new features can be added to the library without requiring a new version of the application. 

In summary, static libraries are linked directly into an application at compile time and offer better performance, while dynamic libraries are linked at runtime and offer more flexibility. The choice between static and dynamic libraries depends on the specific requirements of the application and the library being used.