Swift, OC, C + + mixed programming

OC calls C + +:

1. Create OC Project:

　　

2. Main steps: change a. m file suffix to. mm,

3. Create a C + + file

#ifndef __test__cpphello__ #define __test__cpphello__<stdio.h>class  Cpphello {public:    Static void hello ();}; #endif /* Defined (__test__cpphello__) */

CPPHello.h

1 void Cpphello::hello () 2 {3     printf ("Hello C + + \ n"); 4 }

CPPHello.cpp

4. Only need to #import the file when the call is done.

C + + calls OC:

1. Create OC files based on the above code

2 . Remove the contents of the. h file and write it as a C + + method (cannot contain OC code) such as:

1 void Objchello ();

ObjcHello.h

3 . Change. m files to. mm Files

4 . Implement the method in the. mm file and invoke the OC code in the method (remember to import the appropriate OC header file: NSLog #import <Foundation/Foundation.h>

1 " ObjcHello.h " 2 #import <Foundation/Foundation.h>34void  Objchello ()5  {6     NSLog (@ "Hello OBJC \ n"); 7 }

objchello.mm

or this:

1#import"ObjcHello.h"2#import <Foundation/Foundation.h>3 4 //OC Object5 @interface Objchello:nsobject6 7-(void) Testlog;8 9 @endTen  One @implementation Objchello A  --(void) Testlog - { theNSLog (@"Hello OBJC \ n"); - } -  - @end +  - voidObjchello () + { AObjchello *obj =[[Objchello alloc] init]; at [obj Testlog]; -}

objchello.mm

Swift calls C language code

1. Create a swift Project

2. Create C file appears the following interface, select Yes to automatically generate the bridge connector file:< project name >-bridging-header.h

The purpose of the bridge header file is to set up a bridge for Swift to call the C or OC object, which is named "< project name >-Bridging-header.h", with the introduction of a C or OC header file in the bridge header file.

1 #ifndef __testswift__chello__ 2 #define __testswift__chello__34 #include <stdio.h>56void  hello (); 7 8 #endif /* Defined (__testswift__chello__) */

CHello.h

1 " CHello.h " 2 3 void Hello () 4 {5     printf ("hello c\n"); 6 }

chello.c

" CHello.h "

Testswift-bridging-header.h

Import Foundationhello ();

Main.swift

Swift calls Oc,oc to call C + +:

1.Swift call OC As with Swift call C operation, you need to #import. h through the bridge header file.

2. Use as follows:

1 #import <Foundation/Foundation.h>23@interface ocobj:nsobject4  5 -(void) testlog; 6 7 @end

ocobj.h

  1  #import  " ocobj.h   "   3  @ Implementation Ocobj   4   5 -(void  ) Testlog   {  7  NSLog (@"  hello oc\n   );   "   9  10  @end 

OCOBJ.M

1 Import Foundation 2 3 var obj = ocobj (); 4 obj.testlog ();

Main.swift

3.swift can not call C + + code directly, only by calling Oc,oc call C + + OC Call C + + as long as the OC point. m file is most changed to. mm, step reference above OC call C + +

If you want to add a bridge file manually, please refer to the figure below

Swift, OC, C + + mixed programming