Swift calls OC and C

Swift file: Main.swift

Import Foundation//swift call C function Desc1 ()//swift call oc//get OC class var funcclass = Root () funcclass.desc2 ()

OC File: Root.h

#import <Foundation/Foundation.h> @interface root:nsobject-(void) desc2; @end

Root.m

#import "Root.h" @implementation root//summation function//1, define function int sum2 (int a, int b) {    return a+b;} -(void) desc2{    //2, declaring block    int (^p) (int, int);        3, function pointer pointing function    //    p = sum2;    p = ^ (int a, int b)//Assign the function to block    {        return a+b;    };        4. Use    int result = P (ten, +);    printf ("OC method Output result:%d\n", result);}

C Function File:

Fun.c

#include <stdio.h>//summation function//1, declaring function int sum1 (int a, int b) {    return a+b;} void Desc1 () {    //2, declaring function pointer    int (*p) (int, int);        3, function pointer pointing function    p = sum1;        4. Use    int result = P (ten, +);    printf ("C function output Result:%d\n", result);}

Bridging files: Project name-bridging-header.h

This needs to import the bridged C or OC header file//import C function void Desc1 ();//import OC Header file #import "Root.h"

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Swift calls OC and C