The difference between OC and Swift one

1. File suffix name

The file suffix of OC is named: header file. h principal file. m

The swift file suffix is named:. Swift

2. Code Separators

Use semicolons in OC; as code separators

There is no need to use code separators in swift, separated by lines as code, and with multiple lines of code in a row, the same semicolon is used between lines of code;

3.main function

The main function of OC is the entry of the program, and its function definition is similar to C language

Swift does not have a main function, its code is first run, the first line of code is the program entry

The difference between OC and Swift one