Objective－C学习笔记－－－构造函数和析构函数

 1 @interface Person:NSObject{
 2 @private
 3     int age;
 4     NSString *name;
 5 }
 6 -(id)init;                   //不带参数的构造函数
 7 -(id)initWithname:(NSString *)newname age:(int)newage;   //带参数的构造函数
 8 
 9 @end
10 
11 
12 @implementation Person
13 
14 -(id)init{
15     self = [super init];
16     if(self){
17        name ＝ @“xiaoming”;
18        age = 20;
19     }
20     return self;
21 }
22 
23 -(id)initWithname:(NSString *)newname age:(int)newage{
24      if(self=[super init]){
25         age = newage;
26         name = newname; 
27     }   
28     return self;
29 }
30 int main(int argc, const char * argv[]) {
31 
32     Person *p1 = [[Person alloc] init];              //对象生成后调用初始化函数    
33     Person *P2 = [[Person alloc] initWithnam:(NSString *)xiaohong age:19];
34     //调用带参数的构造函数进行初始化
35     return 0;
36 }

 1 @interface Person:NSObject{
 2 @private
 3     int age;
 4     NSString *name;
 5 }
 6 -(void)dealloc;                    //声明析构函数，析构函数只能有一个
 7 @end
 8 
 9 
10 @implementation Person      //实现Person 类
11 -(void)dealloc{
12     NSLog(@"this is dealloc function");
13     [super dealloc];
14 }
15 
16 @end
17 
18 Person *xiaoming = [Person alloc];
19 [xiaoming release];