objective-c - 这个复制类方法会泄漏内存吗？

Question

- (id)copyWithZone:(NSZone *)zone {
    PoolFacility *copy = [[[self class] allocWithZone:zone]init];
    copy.name = [self.name copy];
    copy.type = [self.type copy];
    copy.phoneNumber = [self.phoneNumber copy];
    //make sure I get proper copies of my dictionaries
    copy.address = [self.address mutableCopy];  
    copy.webAddress = [self.webAddress copy];
    copy.prices = [self.prices mutableCopy];
    copy.pools = [self.pools mutableCopy];
    return copy;
}

有人能看到内存泄漏吗？

以下是属性类型:

NSString *name;
NSString *type;
NSMutableDictionary *address;

NSString *phoneNumber;
NSString *webAddress;   

NSMutableArray *prices;
NSMutableArray *pools;

以下是属性声明:

@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *type;
@property (nonatomic, copy) NSString *phoneNumber;
@property (nonatomic, retain) NSMutableDictionary *address;
@property (nonatomic, copy) NSString *webAddress;
@property (nonatomic, retain) NSMutableArray *prices;
@property (nonatomic, retain) NSMutableArray *pools;

Answer 1

定义为复制而不是保留的属性在设置如下(您的代码)时将有一个额外的副本

copy.name = [self.name copy];
copy.type = [self.type copy];
copy.phoneNumber = [self.phoneNumber copy];
copy.webAddress = [self.webAddress copy];

只需将它们写为

就足够了

copy.name = self.name;
copy.type = self.type;
copy.phoneNumber = self.phoneNumber;
copy.webAddress = self.webAddress;