OC -- 类方法和对象方法

#import <Foundation/Foundation.h>

@interface Person : NSObject

@property (nonatomic, retain) NSString *name;

@property (nonatomic, assign) int age;

- (void)print;       // 对象方法

+ (void)introduce;   // 类方法

@end

@implementation Person

- (void)print{

// 以下方式均可以输出对象的属性

NSLog(@"name = %@, age = %d", self.name, self.age);

NSLog(@"name = %@, age = %d", _name, _age);

NSLog(@"name = %@, age = %d", [self name], [self age]);

}

+ (void)introduce{

NSLog(@"欢迎来到 以神之名 的博客园!");

}

@end

int main(int argc, const char * argv[]){

Person *p = [[Person alloc] init];

Person *p2 = [[Person alloc] init];

[p setName:@"Jerry"];

[p setAge:10];

p2.name = @"Tom";

p2.age = 12;

[p print];

[p2 print];

[Person introduce];

return 0;

}