Swift calls C, C ++, Object-C, swift calls cobject-c

Swift calls C, C ++, Object-C, swift calls cobject-c

1. Swift calls C Language
A. First, add the CFile file named CHello in the project and generate a bridge file.

　　

 

B. The project structure after creation is shown in:

 

B. Compile the interface method in CHello. h file, compile the implementation method in CHello. c, and introduce CHello. h In the SwiftCallC-Bridging-Header.h file.

CHello. h file

#ifndef __SwiftCallC__CHello__#define __SwiftCallC__CHello__#include <stdio.h>void sayHello();#endif /* defined(__SwiftCallC__CHello__) */

CHello. c file

#include "CHello.h"void sayHello(){    printf("hello\n");}

SwiftCallC-Bridging-Header.h files

#import "CHello.h"

 

2. Swift calls the OC Language
A. Similarly, add the object-c file named OCHello under the project. This is not required because file bridges have been created.

 

B. Compile the interface method in OCHello. h file, compile the implementation method in OCHello. c, and finally introduce the OCHello. h header file in the SwiftCallC-Bridging-Header.h file.

OCHello. h file

# Import <Foundation/Foundation. h> @ interface OCHello: NSObject // The method does not have parentheses. This is really not suitable --! -(Void) sayHello; @ end

OCHello. m file

#import "OCHello.h"@implementation OCHello-(void)sayHello{    NSLog(@"hello");}@end

SwiftCallC-Bridging-Header.h files

#import "CHello.h"#import "OCHello.h"

 

C. Finally, you can call Object-C in Swift code ~

import UIKitclass ViewController: UIViewController {    override func viewDidLoad() {        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.        var oc = OCHello()        oc.sayHello()    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}

3. Swift calls the C ++ Language
To call the c ++ code, you only need to change the original OCHello. change the m file to OCHello. mm, then you can reference the iostream header file in this file .... ^ The feel of c ++ instantly exists!
Finally, you can modify the implementation method slightly.

#import "OCHello.h"#include "iostream"using namespace std;@implementation OCHello-(void)sayHello{    cout<<"Hello"<<endl;}@end