Minimum changes for Xcode 11 beta 5

Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Home.swift

@@ -8,6 +8,8 @@ A view showing featured landmarks above a list of all of the landmarks.
 import SwiftUI
 
 struct CategoryHome: View {
+    @State private var isProfilePresented = false
+
     var categories: [String: [Landmark]] {
         .init(
             grouping: landmarkData,
@@ -39,13 +41,16 @@ struct CategoryHome: View {
             }
             .navigationBarTitle(Text("Featured"))
             .navigationBarItems(trailing:
-                PresentationLink(destination: Text("User Profile")) {
+                Button(action: {
+                    self.isProfilePresented = true
+                }) {
                     Image(systemName: "person.crop.circle")
                         .imageScale(.large)
                         .accessibility(label: Text("User Profile"))
                         .padding()
                 }
-            )
+            ).sheet(isPresented: $isProfilePresented,
+                    content: { Text("User Profile") })
         }
     }
 }

Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Models/Data.swift

@@ -51,7 +51,7 @@ final class ImageStore {
             ?? _sizeImage(images.values[index][ImageStore.originalSize]!, to: size * ImageStore.scale)
         images.values[index][size] = sizedImage
         
-        return Image(sizedImage, scale: Length(ImageStore.scale), label: Text(verbatim: name))
+        return Image(sizedImage, scale: CGFloat(ImageStore.scale), label: Text(verbatim: name))
     }
 
     fileprivate func _guaranteeInitialImage(name: String) -> _ImageDictionary.Index {

Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Supporting Views/GraphCapsule.swift

@@ -9,20 +9,20 @@ import SwiftUI
 
 struct GraphCapsule: View {
     var index: Int
-    var height: Length
+    var height: CGFloat
     var range: Range<Double>
     var overallRange: Range<Double>
     
-    var heightRatio: Length {
-        max(Length(magnitude(of: range) / magnitude(of: overallRange)), 0.15)
+    var heightRatio: CGFloat {
+        max(CGFloat(magnitude(of: range) / magnitude(of: overallRange)), 0.15)
     }
     
-    var offsetRatio: Length {
-        Length((range.lowerBound - overallRange.lowerBound) / magnitude(of: overallRange))
+    var offsetRatio: CGFloat {
+        CGFloat((range.lowerBound - overallRange.lowerBound) / magnitude(of: overallRange))
     }
     
     var animation: Animation {
-        Animation.spring(initialVelocity: 5)
+        Animation.spring()
         	.speed(2)
          	.delay(0.03 * Double(index))
     }

Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Supporting Views/HikeGraph.swift

@@ -40,7 +40,7 @@ struct HikeGraph: View {
         let data = hike.observations
         let overallRange = rangeOfRanges(data.lazy.map { $0[keyPath: self.path] })
         let maxMagnitude = data.map { magnitude(of: $0[keyPath: path]) }.max()!
-        let heightRatio = 1 - Length(maxMagnitude / magnitude(of: overallRange))
+        let heightRatio = 1 - CGFloat(maxMagnitude / magnitude(of: overallRange))
 
         return GeometryReader { proxy in
             HStack(alignment: .bottom, spacing: proxy.size.width / 120) {