4.2OC8-@property和synthesize
例一：
-------------main.m-----------------
//
// main.m
// 构造方法
//
// Created by liuyes on 13-12-8.
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Student.h"
int main(int argc, const char * argv[])
{
@autoreleasepool {
Student *stu = [[Student alloc] init];
stu.age = 29;
int age = stu.age;
NSLog(@"age is %i", age);
[stu release];
}
return 0;
}
-------------Student.h-----------------
// Student.h
// 构造方法
//
// Created by liuyes on 13-12-8.
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface Student : NSObject{
//默认是@protected
int age;
int no;
float height;
}
//当编译器遇到@property时，会自动展开成getter和setter的声明
//- (void)setAge:(int)age;
//- (int)age;
@propertyint age;
@propertyint no;
@propertyfloat height;
@end
-------------Student.m-----------------
//
// Student.m
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import "Student.h"
@implementation Student
@synthesize age;
@synthesize no;
@synthesize height;
@end
例二：
-------------main.m-----------------
//
// main.m
// 构造方法
//
// Created by liuyes on 13-12-8.
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Student.h"
int main(int argc, const char * argv[])
{
@autoreleasepool {
Student *stu = [[Student alloc] init];
stu.age = 29;
int age = stu.age;
NSLog(@"age is %i", age);
[stu release];
}
return 0;
}
-------------Student.h-----------------
// Student.h
// 构造方法
//
// Created by liuyes on 13-12-8.
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface Student : NSObject{
//默认是@protected
int _age;
int _no;
float _height;
}
//当编译器遇到@property时，会自动展开成getter和setter的声明
//- (void)setAge:(int)age;
//- (int)age;
@propertyint age;
@propertyint no;
@propertyfloat height;
@end
-------------Student.m-----------------
//
// Student.m
// Copyright (c) 2013年 renhe. All rights reserved.
//
#import "Student.h"
@implementation Student
@synthesize age = _age;
@synthesize no = _no;
@synthesize height = _height;
@end
例三：
-------------main.m-----------------
-------------Student.h-----------------
-------------Student.m-----------------