add swiftUI code

iOS-SwiftUI-Code/GRDB.swift-6.29.3/Tests/SPM/PlainPackage/Package.swift

@@ -0,0 +1,14 @@
+// swift-tools-version:5.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SPM",
+    dependencies: [
+        .package(name: "GRDB", path: "../../.."),
+    ],
+    targets: [
+        .target(name: "SPM", dependencies: ["GRDB"]),
+    ]
+)

iOS-SwiftUI-Code/GRDB.swift-6.29.3/Tests/SPM/PlainPackage/Sources/SPM/main.swift

@@ -0,0 +1,18 @@
+import GRDB
+
+let cVersion = String(cString: sqlite3_libversion())
+print("SQLite version from C API: \(cVersion)")
+
+let sqlVersion = try! DatabaseQueue().read { db in
+    try String.fetchOne(db, sql: "SELECT sqlite_version()")!
+}
+print("SQLite version from SQL function: \(sqlVersion)")
+
+try! DatabaseQueue().write { db in
+    try db.execute(literal: """
+        CREATE TABLE t(a);
+        INSERT INTO t VALUES(\("O'Brien"));
+        """)
+    let swiftVersion = try String.fetchOne(db, sql: "SELECT a FROM t")!
+    print("Swift string from SQL: \(swiftVersion)")
+}