Changing the initial value of a var in another module

Question

I am using this module to display an image: https://github.com/huynguyencong/ImageScrollView/blob/master/Sources/ImageScrollView.swift

I have added it to my project using CocoaPods and I want to change the value of the var "maxScaleFromMinScale". I just cant figure out how.

First I tried to just override the var which is not possible.

I then tried to override the intializers by just copying and overriding the same ones that are overrided by the creator of the module.

override init(frame: CGRect) {
    super.init(frame: frame)
}

required public init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

That does not work, it gives me an error on the top initializer saying that I am not overriding the designated initializer. It feels like I cannot override it since it is not public like the second one. Correct?

Last thing I tried was to make an extension:

extension ImageScrollView {
    public func setMaxScale(scale: CGFloat) {
        maxScaleFromMinScale = scale
    }
}

That does not work either, maxScaleFromMinScale is an unresolved identifier. This also seems to be because it is an internal var and I do not have access to it (another module). Does this mean that my ONLY option is to copy the whole file and modify the source. Was hoping for a minimal and elegant solution.

If this is the case, why can you override the built in UIKit elements but not this one that I downloaded using CocoaPods.

score 1 · Accepted Answer · answered Jun 23 '16 at 08:56

1

Yes, you cannot override the variable/function because it's internal. That's the point of access modifiers.

Certain UIKit functions are public so you can override them.

answered Jun 23 '16 at 08:56

Code

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So basically, when using modules if something needs changing in their code you have to do the "stupid" thing and just copy the whole thing? – Alex Jun 23 '16 at 09:24
@Alex Yes. If it's not `public` then it's not meant to be overridden. – Code Jun 23 '16 at 09:28

score -1 · Answer 2 · answered Jun 23 '16 at 09:01

-1

Go to the pod file and unlock the file (It prompts to do that on editing), and change

var maxScaleFromMinScale: CGFloat = 3.0

to

public var maxScaleFromMinScale: CGFloat = 3.0

answered Jun 23 '16 at 09:01

Lazy

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You can also use "static". – Lazy Jun 23 '16 at 09:02
What do you mean "unlock". How can I do this? – Alex Jun 23 '16 at 09:21
Like I said it prompts on editing, if it doesn't you can just make the variable public. – Lazy Jun 23 '16 at 09:22
@Alex he means directly editing the source code of the pod locally. But in practice you shouldn't do that. Instead, clone the pod if you're applying modifications. – Cœur Jan 19 '18 at 02:23

Changing the initial value of a var in another module

2 Answers2