空文案时弹出提示不跳转

Note/FormatterView.swift

@@ -10,6 +10,7 @@ import SwiftUI
 struct FormatterView: View {
     @State private var inputText: String = ""
     @State private var resultText: String?
+    @State private var showEmptyAlert: Bool = false
 
     var body: some View {
         NavigationStack {
@@ -41,10 +42,19 @@ struct FormatterView: View {
             .navigationDestination(item: $resultText) { text in
                 ResultView(formattedText: text)
             }
+            .alert("提示", isPresented: $showEmptyAlert) {
+                Button("确定", role: .cancel) {}
+            } message: {
+                Text("请输入需要格式化的文案")
+            }
         }
     }
 
     private func formatAndNavigate() {
+        if inputText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
+            showEmptyAlert = true
+            return
+        }
         resultText = format(inputText)
     }