// // Dog.h // OC2_點語法(屬性關鍵字) // // Created by zhangxueming on 15/6/16. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import <Foundation/Foundation.h>@interface Dog : NSObject //屬性關鍵字 //assgin(缺省)直接賦值 //基本類型 代理對象指針//retain 先release 再 retain //除了基本類型 字符串類型 代理對象, 剩下的通常用 retain//copy 先release 再 copy //字符串對象用copy//atomic(缺省),nonatomic //原子性的 非原子性的//readwrite(缺省) 展開對應的setter getter方法 //readonly 只展開對應的getter方法//setter getter 修改setter getter方法的方法名 //點語法訪問不受影響 //經典訪問要使用新的方法名 @property (assign,atomic)NSInteger age;@property (assign, nonatomic, readwrite)float weight;@property (copy,nonatomic)NSString *name;@property (assign,setter=setNewNumber:,getter=getNumber) NSInteger number;@end // // Dog.m // OC2_點語法(屬性關鍵字) // // Created by zhangxueming on 15/6/16. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import "Dog.h"@implementation Dog@synthesize age = _age;- (NSInteger)age {NSLog(@"getter");return _age; }- (void)setAge:(NSInteger)age {NSLog(@"setter");_age = age; }@end // // main.m // OC2_點語法(屬性關鍵字) // // Created by zhangxueming on 15/6/16. // Copyright (c) 2015年 zhangxueming. All rights reserved. // #import <Foundation/Foundation.h> #import "Dog.h"int main(int argc, const char * argv[]) {@autoreleasepool {Dog *dog = [[Dog alloc] init];dog.name= @"小白";dog.age = 12;dog.weight = 34.5;NSLog(@"name = %@ age = %li weight = %.2f", dog.name, dog.age, dog.weight);dog.number = 100;NSLog(@"number = %li", dog.number);[dog setNewNumber:200];NSLog(@"number = %li", [dog getNumber]);}return 0; }

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轉載于:https://www.cnblogs.com/0515offer/p/4581198.html

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