Update example to leverage ios 15 format

Author: subdigital

TipCalculator/TipCalculator.xcodeproj/project.pbxproj

@@ -102,7 +102,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1100;
-				LastUpgradeCheck = 1100;
+				LastUpgradeCheck = 1340;
 				ORGANIZATIONNAME = "Fickle Bits";
 				TargetAttributes = {
 					B5508B8F22B41C70001AB895 = {
@@ -192,6 +192,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -252,6 +253,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;

TipCalculator/TipCalculator/ContentView.swift

@@ -52,7 +52,7 @@ struct ContentView : View {
             VStack(spacing: 20) {
                 Spacer()
 
-                TextField("Total", value: $totalInput, formatter: currencyFormatter)
+                totalTextField
                     .font(.largeTitle)
                     .padding()
                     .background(Color.white)
@@ -75,6 +75,15 @@ struct ContentView : View {
             .navigationBarTitle(Text("Tip Calculator"))
         }
     }
+
+    private var totalTextField: some View {
+        let currencyCode = Locale.current.currencyCode ?? "USD"
+        if #available(iOS 15.0, *) {
+            return TextField("Total", value: $totalInput, format: .currency(code: currencyCode))
+        } else {
+            return TextField("Total", value: $totalInput, formatter: currencyFormatter)
+        }
+    }
 
     private func summaryLine(label: String, amount: String, color: Color) -> some View {
         HStack {
@@ -90,8 +99,8 @@ struct ContentView : View {
 
     private var segmentedTipPercentages: some View {
         Picker(selection: $selectedTipPercentage, label: Text("")) {
-            ForEach(0..<tipPercentages.count) { index in
-                Text(self.formatPercent(self.tipPercentages[index])).tag(index)
+            ForEach(tipPercentages.indices, id: \.self) { index in
+                Text(formatPercent(tipPercentages[index])).tag(index)
             }
         }.pickerStyle(SegmentedPickerStyle())
     }