04일차 OC 언어(11): 사용자 정의 구조 방법

   OC init , 
     : ,   

  :
  init 
 1. 
 2. id/instancetype
 3.   init 
 //    0 
 //    1   

#pragma mark 11- 
#pragma mark  
/*
  :
  init 
 1. 
 2. id/instancetype
 3.   init 
 //    0 
 //    1   
 */
#pragma mark -  
#import 
#pragma mark  

#import "Person.h"

#pragma mark - main 
int main(int argc, const char * argv[])
{
    
//    Person *p = [Person new];
//    Person *p = [[Person alloc]init];
//    p.age = 20;
//    Person *p = [[Person alloc]initWithAge:33];
//    Person *p = [[Person alloc]initWithName:@"lys"];
    Person *p = [[Person alloc]initWithAge:33 andName:@"lyt"];
    NSLog(@"%@",p);
    
//    Person *p2 = [[Person alloc]init];
//    Person *p2 = [[Person alloc]initWithAge:55];
    Person *p2 = [[Person alloc]initWithName:@"lyh"];
    NSLog(@"%@",p2);
    
    return 0;
}

>>>.h
#import 

@interface Person : NSObject

@property int age;
@property NSString *name;

/*
  :
  init 
 1. 
 2. id/instancetype
 3.   init 
 */


//    0 
- (instancetype)initWithAge:(int)age;
- (instancetype)initWithName:(NSString *)name;

//    1   
- (instancetype)initWithAge:(int)age andName:(NSString *)name;

@end

>>>.m
#import "Person.h"

@implementation Person

- (instancetype)init
{
    if (self = [super init]) {
        _age = 10;
    }
    return self;
}

- (instancetype)initWithAge:(int)age
{
    if (self = [super init]) {
        _age = age;
    }
    return self;
}

- (instancetype)initWithName:(NSString *)name
{
    if (self = [super init]) {
        _name = name;
    }
    return self;
}

- (instancetype)initWithAge:(int)age andName:(NSString *)name
{
    if (self = [super init]) {
        _age = age;
        _name = name;
    }
    return self;
}

- (NSString *)description
{
    return [NSString stringWithFormat:@" age = %i , name = %@",_age,_name];
}

@end