OC 成员变量自动生成get set方法

@interface PersonModel : NSObject

{

@private int age ;

@public float heigh;

@public NSString *name;

}

@property (nonatomic ,assign )int age ;

-(id) init;

-(id) initWithAge : (int) newAge;

+(PersonModel * ) person;

@end

// 

@implementation PersonModel

@synthesize age;

-(id)init{

    if (self = [super init]) {

        

        age = 30;

        heigh = 179.0;

        name = @"jiachong";

    }

    return self ;

}

-(id)initWithAge:(int)newAge{

    if (self = [super init]) {

        age = newAge;

        heigh = 179.0;

        name = @"jiachong";

    }

    return self ;

}

+(PersonModel * ) person{

    return [[self alloc] init];

}

@synthesize age; //编译器自动解释成 age的get、set方法实现。  在xcode4.5之后可以不写这句话  

@end

上面红色部分为定义   

调用方法

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

        p->name = @"jiachong";

               p.age = 29;

        p->heigh = 179.0;

        NSLog(@"name is %@ , age is %d , height is %f .",p->name,p.age,p->heigh);