oc_study15--点语法

点语法只能用在取代方法的set和get

#import <Foundation/Foundation.h>@interface Person : NSObject{    int _age1;    int _age2;}- (void)setAge1:(int)age1;- (int)age1;- (void)setAge2:(int)age2;- (int)age2;@end@implementation Person- (void)setAge1:(int)age1{    _age1 = age1;}- (int)age1{    return _age1;}- (void)setAge2:(int)age2{    _age2 = age2;}- (int)age2{    return _age2;}@endint main(void){    Person * p = [Person new];    p.age1 = 12;    p.age2 = 21;    NSLog(@"age1 = %i", p.age1);    NSLog(@"age2 = %i", p.age2);    return 0;}