//联系人:石虎QQ: 1224614774昵称:嗡嘛呢叭咪哄
一、浅拷贝
首先创建Person.h和Person.m,实现协议
#Person.h
@interfacePerson : NSObject
@property(nonatomic,copy) NSString *name;
@end
#Person.m
@implementationPerson
@synthesizename;
//实现copyWithZone方法
- (id)copyWithZone:(NSZone*)zone {
Person*p = [[selfclass] allocWithZone:zone];
p.name = [selfname];
return p;
}
@end
二、测试浅拷贝
Person* person = [[Person alloc] init];
[person setName:@"leo"];
NSArray* arr1 = [[NSArray alloc] initWithObjects:person,@"AA",@[@"AA"], [NSMutableArray arrayWithObjects:@"AA",nil],nil];
NSArray* arr2 = [[NSArrayalloc]initWithArray:arr1];
NSArray* arr3 = [[NSArrayalloc]initWithArray:arr1copyItems:YES];
[person setName:@"lily"];
//尝试更改name的值
//获取两个数组里的各自Person对象
Person* p1 = [arr1 objectAtIndex:0];
Person* p2 = [arr2 objectAtIndex:0];
Person* p3 = [arr3 objectAtIndex:0];
NSLog(@"arr1 :%p非集合:%p不可变集合:%p可变集合:%p", arr1, arr1[1], arr1[2], arr1[3]);
NSLog(@"arr2 :%p非集合:%p不可变集合:%p可变集合:%p", arr2, arr2[1], arr2[2], arr2[3]);
NSLog(@"arr3 :%p非集合:%p不可变集合:%p可变集合:%p", arr3, arr3[1], arr3[2], arr3[3]);
NSLog(@"p1:%p name:%@", p1, p1.name);
NSLog(@"p2:%p name:%@", p2, p2.name);
NSLog(@"p3:%p name:%@", p3, p3.name);
arr1 :0x100404520非集合:0x100002090不可变集合:0x1004040a0可变集合:0x100404230
arr2 :0x100404630非集合:0x100002090不可变集合:0x1004040a0可变集合:0x100404230
arr3 :0x100404790非集合:0x100002090不可变集合:0x1004040a0可变集合:0x100404780
p1:0x1004006b0name:lily
p2:0x1004006b0name:lily
p3:0x100404090name:leo
