CODEWITHSUNDEEP
iosswift
Olexiy Pyvovarov
Olexiy Pyvovarov

Reputation: 890

Swift dictionary change the variable of the value

I'm sorry if it's already discussed, but i don't find the solution

I have a struct:

struct Point2D
{
    var x: Double = 0.0
    var y: Double = 0.0
}

And I have a class also:

class Letter
{   
    var points3D: Dictionary<String,Point3D> = [:]
    var points2D: Dictionary<String,Point2D> = [:]
    var edges: Dictionary<String,Edge> = [:]
}

In some view:

class GraphicView: UIView {
   var letter:Letter!

   override func drawRect(rect: CGRect) {
      for (name,point3d) in letter.points3D {
            //Says String isn't convertable to DictionaryIndex<String,Point2D> 
            letter.points2D[name]!.x = point3d.x * (perspective / (perspective - point3d.z)) + imageWidth/2
            letter.points2D[name]!.y = point3d.y * (perspective / (perspective - point3d.z)) + imageHeight/2
        }
}

I'm trying to find some value for key (I know it exists) and change variables of this value to another. What's wrong?

Upvotes: 0

Views: 87

Answers (1)

rintaro
rintaro

Reputation: 51911

Maybe perspective, imageWidth or imageHeight is not Double?

try:

class GraphicView: UIView {
   var letter:Letter!

   override func drawRect(rect: CGRect) {
      for (name,point3d) in letter.points3D {
            letter.points2D[name]!.x = point3d.x * (Double(perspective) / (Double(perspective) - point3d.z)) + Double(imageWidth)/2
            letter.points2D[name]!.y = point3d.y * (Double(perspective) / (Double(perspective) - point3d.z)) + Double(imageHeight)/2
        }
}

Upvotes: 1

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