Object-c and Swift

1. Calling Swift in the OBJECT-C project

1.1. Create a OBJECT-C project (project name for example: Yydemo) as

1.2. Create a swift Class, such as

This shows whether you need to create a header for the OC Bridge, and then we select the Create

PS: Bridge file

Unlike the SWIFT call OC, it is important to note the following

This is required by Swift to invoke the OC language and import the Object-c file into this bridge file Here we are OC invoke Swift language, so do not import the Swift file in this bridge file because it was created, Xcode also created a hidden file and this hidden file is the imperative for our OC to invoke Swift language. So what's his name? "Project Engineering name" + "-" + "Swift". HWe need to import this hidden file in OC class, although we can't see it, but it actually exists.

Calling Object-c in a 2.Swift project

2.1. Create a Swift Project

2.2 Creating a Object-c class

The same will show if you need to create a header for the OC Bridge, and then we choose Create.

2.3 Importing OC files into a bridge file

If you do not import, there will be no prompt in the swift file, and you cannot call

2.4. Create an object in the Swift file, run

Object-c and Swift