MRC条件下
- (void)setDog:(Dog *)dog
{
if (_dog != dog) {
[_dog release];
_dog = nil;
_dog = [dog retain];
}
}
- (void)setName:(NSString *)newName
{
if(_name != newName) {
[_name release];
_name = nil;
_name = [newName copy];
}
}
ARC条件下
- (void)setDog:(Dog *)newDog
{
if(_dog != newDog) {
_dog = newDog;
}
}
- (void)setName:(NSString *)name
{
if(_name != name) {
_name = nil;
_name = [name copy];
}
}