oc_对象的深拷贝

#import <Foundation/Foundation.h>

#import "Dog.h"

int main(int argc, const char * argv[])

{

    @autoreleasepool {

        //copy方法

        NSMutableArray *marr = [[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",nil];

        NSArray *arr = [marr copy];

        //mutableCopy方法, 用于获取一个可变对象

        Dog *dog = [[Dog alloc] init];

        NSMutableString *mstr = [[NSMutableString alloc] initWithString:@"ahua"];

        dog.name = mstr;

        Dog *anthorDog = [dog copy];

        anthorDog.name = @"1212";

       // Dog *anthorDog = [Dog new];

        NSLog(@"dog name = %@  anthorDog name=%@",dog.name,anthorDog.name);

    }

    return 0;

}