在Objective-C中使用C++
Greeting.h
#import <Foundation/Foundation.h>class Hello {private:id greeting_text;public:Hello() {greeting_text = @"Hello, world!";}Hello(const char *initial_greeting_text) {greeting_text = [[NSString alloc] initWithUTF8String:initial_greeting_text];}void say_hello() {printf("%s\n", [greeting_text UTF8String]);}};@interface Greeting : NSObject {@privateHello *hello;}- (id)init;- (void)dealloc;- (void)sayGreeting;- (void)sayGreeting:(Hello *)greeting;@end?
#import "Greeting.h"@implementation Greeting- (id)init { if (self = [super init]) { hello = new Hello(); } return self;}- (void)dealloc { delete hello; [super dealloc];}- (void)sayGreeting { hello->say_hello();}- (void)sayGreeting:(Hello *)greeting { greeting->say_hello();}@end
Greeting *greeting = [[Greeting alloc] init];[greeting sayGreeting]; Hello *hello = new Hello("Hello");[greeting sayGreeting:hello]; delete hello;[greeting release];
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主要是要注意类必须以mm结尾，否则无法编译。
