Can Swift do everything that Objective-C can do?

Question

I am new to IOS developing, and want to use the Swift language instead of Objective-C.

I know few concepts about Cocoa touch, and I want to know : Can Swift do everything that Objective-C can do ?

Answer 1

There are a lot of things that can be done in Objective-C but cannot be done in Swift, without implementing it in Objective-C and then using it from Swift. Some of them include:

• Catching Objective-C exceptions
• Using C++ APIs (through Objective-C++)
• Using NSInvocation, performSelector: and other ways of making calls dynamically where the method to call is chosen at runtime
• Handling unimplemented method calls using forwardInvocation:
• Provide a function for use in C APIs that take a function pointer