Mixing
How can I access properties from my subclasses?
I having problem to access the properties from my subclasses. I have defined the superclass and than I've created the subclasses that inherited from super class. I Initialized my superclass inside my subclasses.
I have a class called Box. Inside this class I have a property called Offer that's of type OfferType.
var Offer: OfferType?
Than I've created the class OfferType and set some properties to inside it.
class OfferType {
var Name: String?
var Image: UIImage?
var Description: String?
init(Name: String, Image: UIImage, Description: String) {
self.Name = Name
self.Image = Image
self.Description = Description
}
}
Than I created 3 subclass of OfferType
class Discount: OfferType {
var Quantity: Int?
init() {
super.init(Name: "Discount", Image: UIImage(named: "Discount")!, Description: "nice")
}
}
class FreeShipping: OfferType {
var From: String?
var To: String?
init() {
super.init(Name: "FreeShiping", Image: UIImage(named: "FreeShipping")!, Description: "lalaa")
}
}
class BoGoF: OfferType {
lazy var SecondProduct = String()
init() {
super.init(Name: "BoGoF", Image: UIImage(named: "BoGoF")!, Description: "boh")
}
}
Now I'm trying to get the property of the subclass after Assign the subclass as property Offer inside BOX class.
I can't do it, the only options Xcode gives to me is to access the properties of superclass (OfferType )
I need to access the property Quantity of subclass Discount.
Here is Where I'm trying to access the properties
First I assign the subclass to the property in class Box
newBox.Offer = Discount
Now I'm trying to get the properties of Discount and It doesn't give to me
newBox.Offer. 
I tried to cast it but It didn't work
My class newbox is defined like that
That's how the class Box is defined
swift class inheritance subclass
edited Jan 3 at 5:54
Miraj50
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
add a comment |
I having problem to access the properties from my subclasses. I have defined the superclass and than I've created the subclasses that inherited from super class. I Initialized my superclass inside my subclasses.
I have a class called Box. Inside this class I have a property called Offer that's of type OfferType.
var Offer: OfferType?
Than I've created the class OfferType and set some properties to inside it.
class OfferType {
var Name: String?
var Image: UIImage?
var Description: String?
init(Name: String, Image: UIImage, Description: String) {
self.Name = Name
self.Image = Image
self.Description = Description
}
}
Than I created 3 subclass of OfferType
class Discount: OfferType {
var Quantity: Int?
init() {
super.init(Name: "Discount", Image: UIImage(named: "Discount")!, Description: "nice")
}
}
class FreeShipping: OfferType {
var From: String?
var To: String?
init() {
super.init(Name: "FreeShiping", Image: UIImage(named: "FreeShipping")!, Description: "lalaa")
}
}
class BoGoF: OfferType {
lazy var SecondProduct = String()
init() {
super.init(Name: "BoGoF", Image: UIImage(named: "BoGoF")!, Description: "boh")
}
}
Now I'm trying to get the property of the subclass after Assign the subclass as property Offer inside BOX class.
I can't do it, the only options Xcode gives to me is to access the properties of superclass (OfferType )
I need to access the property Quantity of subclass Discount.
Here is Where I'm trying to access the properties
First I assign the subclass to the property in class Box
newBox.Offer = Discount
Now I'm trying to get the properties of Discount and It doesn't give to me
newBox.Offer.
I tried to cast it but It didn't work
My class newbox is defined like that
That's how the class Box is defined
swift class inheritance subclass
edited Jan 3 at 5:54
Miraj50
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13
add a comment |
I having problem to access the properties from my subclasses. I have defined the superclass and than I've created the subclasses that inherited from super class. I Initialized my superclass inside my subclasses.
I have a class called Box. Inside this class I have a property called Offer that's of type OfferType.
var Offer: OfferType?
Than I've created the class OfferType and set some properties to inside it.
class OfferType {
var Name: String?
var Image: UIImage?
var Description: String?
init(Name: String, Image: UIImage, Description: String) {
self.Name = Name
self.Image = Image
self.Description = Description
}
}
Than I created 3 subclass of OfferType
class Discount: OfferType {
var Quantity: Int?
init() {
super.init(Name: "Discount", Image: UIImage(named: "Discount")!, Description: "nice")
}
}
class FreeShipping: OfferType {
var From: String?
var To: String?
init() {
super.init(Name: "FreeShiping", Image: UIImage(named: "FreeShipping")!, Description: "lalaa")
}
}
class BoGoF: OfferType {
lazy var SecondProduct = String()
init() {
super.init(Name: "BoGoF", Image: UIImage(named: "BoGoF")!, Description: "boh")
}
}
Now I'm trying to get the property of the subclass after Assign the subclass as property Offer inside BOX class.
I can't do it, the only options Xcode gives to me is to access the properties of superclass (OfferType )
I need to access the property Quantity of subclass Discount.
Here is Where I'm trying to access the properties
First I assign the subclass to the property in class Box
newBox.Offer = Discount
Now I'm trying to get the properties of Discount and It doesn't give to me
newBox.Offer.
I tried to cast it but It didn't work
My class newbox is defined like that
That's how the class Box is defined
swift class inheritance subclass
edited Jan 3 at 5:54
Miraj50
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
I having problem to access the properties from my subclasses. I have defined the superclass and than I've created the subclasses that inherited from super class. I Initialized my superclass inside my subclasses.
I have a class called Box. Inside this class I have a property called Offer that's of type OfferType.
var Offer: OfferType?
Than I've created the class OfferType and set some properties to inside it.
class OfferType {
var Name: String?
var Image: UIImage?
var Description: String?
init(Name: String, Image: UIImage, Description: String) {
self.Name = Name
self.Image = Image
self.Description = Description
}
}
Than I created 3 subclass of OfferType
class Discount: OfferType {
var Quantity: Int?
init() {
super.init(Name: "Discount", Image: UIImage(named: "Discount")!, Description: "nice")
}
}
class FreeShipping: OfferType {
var From: String?
var To: String?
init() {
super.init(Name: "FreeShiping", Image: UIImage(named: "FreeShipping")!, Description: "lalaa")
}
}
class BoGoF: OfferType {
lazy var SecondProduct = String()
init() {
super.init(Name: "BoGoF", Image: UIImage(named: "BoGoF")!, Description: "boh")
}
}
Now I'm trying to get the property of the subclass after Assign the subclass as property Offer inside BOX class.
I can't do it, the only options Xcode gives to me is to access the properties of superclass (OfferType )
I need to access the property Quantity of subclass Discount.
Here is Where I'm trying to access the properties
First I assign the subclass to the property in class Box
newBox.Offer = Discount
Now I'm trying to get the properties of Discount and It doesn't give to me
newBox.Offer.
I tried to cast it but It didn't work
My class newbox is defined like that
That's how the class Box is defined
swift class inheritance subclass
swift class inheritance subclass
edited Jan 3 at 5:54
Miraj50
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
edited Jan 3 at 5:54
Miraj50
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
edited Jan 3 at 5:54
Miraj50
2,78011025
edited Jan 3 at 5:54
Miraj50
2,78011025
edited Jan 3 at 5:54
Miraj50
2,78011025
2,78011025
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
asked Jan 3 at 0:53
Felipe FernandesFelipe Fernandes
33
33
Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13
add a comment |
Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13
Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13
add a comment |
1 Answer
1
active
oldest
votes
Your newBox instance probably has the offer property defined as OfferType.
Even though you put an instance of Discount inside the offer property, the compiler has no way to know that since all you've told the compiler is that offer will contain an OfferType. It has no way to know the specific OfferType that will be contained there.
You have to cast offer to the type you expect. I suggest you look into as and is. Here is an example:
if let discount = newBox.offer as? Discount {
print("Discount Quantity is (discount.quantity)")
}
Here the as? keyword basically tells the compiler the following:
is
newBox.offera kind ofDiscount? If so return that, otherwise,
return nil.
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show howofferis defined innewBox. Also detail the error you are obtaining.
– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to useas?notas!, otherwise an if...let isn't valid.
– FJ de Brienne
Jan 3 at 1:45
|
show 6 more comments
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your newBox instance probably has the offer property defined as OfferType.
Even though you put an instance of Discount inside the offer property, the compiler has no way to know that since all you've told the compiler is that offer will contain an OfferType. It has no way to know the specific OfferType that will be contained there.
You have to cast offer to the type you expect. I suggest you look into as and is. Here is an example:
if let discount = newBox.offer as? Discount {
print("Discount Quantity is (discount.quantity)")
}
Here the as? keyword basically tells the compiler the following:
is
newBox.offera kind ofDiscount? If so return that, otherwise,
return nil.
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show howofferis defined innewBox. Also detail the error you are obtaining.
– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to useas?notas!, otherwise an if...let isn't valid.
– FJ de Brienne
Jan 3 at 1:45
|
show 6 more comments
Your newBox instance probably has the offer property defined as OfferType.
Even though you put an instance of Discount inside the offer property, the compiler has no way to know that since all you've told the compiler is that offer will contain an OfferType. It has no way to know the specific OfferType that will be contained there.
You have to cast offer to the type you expect. I suggest you look into as and is. Here is an example:
if let discount = newBox.offer as? Discount {
print("Discount Quantity is (discount.quantity)")
}
Here the as? keyword basically tells the compiler the following:
is
newBox.offera kind ofDiscount? If so return that, otherwise,
return nil.
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show howofferis defined innewBox. Also detail the error you are obtaining.
– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to useas?notas!, otherwise an if...let isn't valid.
– FJ de Brienne
Jan 3 at 1:45
|
show 6 more comments
Your newBox instance probably has the offer property defined as OfferType.
Even though you put an instance of Discount inside the offer property, the compiler has no way to know that since all you've told the compiler is that offer will contain an OfferType. It has no way to know the specific OfferType that will be contained there.
You have to cast offer to the type you expect. I suggest you look into as and is. Here is an example:
if let discount = newBox.offer as? Discount {
print("Discount Quantity is (discount.quantity)")
}
Here the as? keyword basically tells the compiler the following:
is
newBox.offera kind ofDiscount? If so return that, otherwise,
return nil.
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
Your newBox instance probably has the offer property defined as OfferType.
Even though you put an instance of Discount inside the offer property, the compiler has no way to know that since all you've told the compiler is that offer will contain an OfferType. It has no way to know the specific OfferType that will be contained there.
You have to cast offer to the type you expect. I suggest you look into as and is. Here is an example:
if let discount = newBox.offer as? Discount {
print("Discount Quantity is (discount.quantity)")
}
Here the as? keyword basically tells the compiler the following:
is
newBox.offera kind ofDiscount? If so return that, otherwise,
return nil.
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
edited Jan 3 at 1:22
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
answered Jan 3 at 1:17
FJ de BrienneFJ de Brienne
14810
14810
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show howofferis defined innewBox. Also detail the error you are obtaining.
– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to useas?notas!, otherwise an if...let isn't valid.
– FJ de Brienne
Jan 3 at 1:45
|
show 6 more comments
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show howofferis defined innewBox. Also detail the error you are obtaining.
– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to useas?notas!, otherwise an if...let isn't valid.
– FJ de Brienne
Jan 3 at 1:45
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
I tried to do that before, it's giving me error type dude.
– Felipe Fernandes
Jan 3 at 1:40
Please show how
offer is defined in newBox. Also detail the error you are obtaining.– FJ de Brienne
Jan 3 at 1:42
Please show how
offer is defined in newBox. Also detail the error you are obtaining.– FJ de Brienne
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
I edit it again
– Felipe Fernandes
Jan 3 at 1:42
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
last pictures I'm showing how it's defined
– Felipe Fernandes
Jan 3 at 1:44
You have to use
as? not as!, otherwise an if...let isn't valid.– FJ de Brienne
Jan 3 at 1:45
You have to use
as? not as!, otherwise an if...let isn't valid.– FJ de Brienne
Jan 3 at 1:45
|
show 6 more comments
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Edit this and show us what you what you are saying. I see the classes here, and that's a great start, but I don't see where you are trying to access any properties. I think I know what you are saying, and it's a quick fix, however, could you show us?
– impression7vx
Jan 3 at 0:59
Edited just right now
– Felipe Fernandes
Jan 3 at 1:11
Show us how newBox.offer is defined. Never mind, see my answer.
– FJ de Brienne
Jan 3 at 1:13