在Objective-C中使用C++

Greeting.h

1. #import <Foundation/Foundation.h>
3. class Hello {
4. private:
5. id greeting_text;
6. public:
7. Hello() {
8. greeting_text = @"Hello, world!";
9. }
10. Hello(const char *initial_greeting_text) {
11. greeting_text = [[NSString alloc] initWithUTF8String:initial_greeting_text];
12. }
13. void say_hello() {
14. printf("%s\n", [greeting_text UTF8String]);
15. }
16. };
18. @interface Greeting : NSObject {
19. @private
20. Hello *hello;
21. }
23. - (id)init;
24. - (void)dealloc;
25. - (void)sayGreeting;
26. - (void)sayGreeting:(Hello *)greeting;
27. @end

Greeting.mm

1. #import "Greeting.h"
3. @implementation Greeting
5. - (id)init {
6. if (self = [super init]) {
7. hello = new Hello();
8. }
9. return self;
10. }
12. - (void)dealloc {
13. delete hello;
14. [super dealloc];
15. }
17. - (void)sayGreeting {
18. hello->say_hello();
19. }
21. - (void)sayGreeting:(Hello *)greeting {
22. greeting->say_hello();
23. }
25. @end

示例：

1. Greeting *greeting = [[Greeting alloc] init];
2. [greeting sayGreeting];
4. Hello *hello = new Hello("Hello");
5. [greeting sayGreeting:hello];
7. delete hello;
8. [greeting release];

主要是要注意類必須以mm結尾，否則無法編譯。

免費下載地址在 http://linux.linuxidc.com/

用戶名與密碼都是www.linuxidc.com

具體下載目錄在 /2012年資料/9月/2日/在Objective-C中使用C++