Add Objective-C iOS demo app (UIKit) matching the Swift demo

.gitignore

@@ -7,4 +7,5 @@ DerivedData/
 .netrc
 *.xcodeproj
 !Examples/iOSDemo/iOSDemo.xcodeproj
+!Examples/iOSDemoObjC/iOSDemoObjC.xcodeproj
 _codeql_detected_source_root

Examples/iOSDemoObjC/iOSDemoObjC/AppDelegate.h

@@ -0,0 +1,12 @@
+//
+//  AppDelegate.h
+//  iOSDemoObjC
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+@end

Examples/iOSDemoObjC/iOSDemoObjC/AppDelegate.m

@@ -0,0 +1,25 @@
+//
+//  AppDelegate.m
+//  iOSDemoObjC
+//
+
+#import "AppDelegate.h"
+#import "MainViewController.h"
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+
+    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
+
+    MainViewController *mainVC = [[MainViewController alloc] initWithStyle:UITableViewStyleInsetGrouped];
+    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:mainVC];
+
+    self.window.rootViewController = nav;
+    [self.window makeKeyAndVisible];
+
+    return YES;
+}
+
+@end

Examples/iOSDemoObjC/iOSDemoObjC/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/iOSDemoObjC/iOSDemoObjC/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,13 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/iOSDemoObjC/iOSDemoObjC/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/iOSDemoObjC/iOSDemoObjC/MainViewController.h

@@ -0,0 +1,12 @@
+//
+//  MainViewController.h
+//  iOSDemoObjC
+//
+//  Navigation hub — equivalent of ContentView.swift in the Swift demo.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface MainViewController : UITableViewController
+
+@end

Examples/iOSDemoObjC/iOSDemoObjC/MainViewController.m

@@ -0,0 +1,107 @@
+//
+//  MainViewController.m
+//  iOSDemoObjC
+//
+
+#import "MainViewController.h"
+#import "StreamBufferDemoViewController.h"
+#import "SSEParserDemoViewController.h"
+#import "UTF8SafetyDemoViewController.h"
+#import "SocketConnectionDemoViewController.h"
+
+typedef NS_ENUM(NSInteger, DemoSection) {
+    DemoSectionCore = 0,
+    DemoSectionSocket,
+    DemoSectionCount
+};
+
+@implementation MainViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.title = @"NWAsyncSocket ObjC Demo";
+}
+
+#pragma mark - UITableViewDataSource
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
+    return DemoSectionCount;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    switch (section) {
+        case DemoSectionCore:   return @"Core Components";
+        case DemoSectionSocket: return @"Socket";
+        default: return nil;
+    }
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    switch (section) {
+        case DemoSectionCore:   return 3;
+        case DemoSectionSocket: return 1;
+        default: return 0;
+    }
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
+    if (!cell) {
+        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
+        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+    }
+
+    UIListContentConfiguration *config = [UIListContentConfiguration cellConfiguration];
+
+    if (indexPath.section == DemoSectionCore) {
+        switch (indexPath.row) {
+            case 0:
+                config.text = @"StreamBuffer";
+                config.image = [UIImage systemImageNamed:@"arrow.left.arrow.right"];
+                break;
+            case 1:
+                config.text = @"SSE Parser";
+                config.image = [UIImage systemImageNamed:@"antenna.radiowaves.left.and.right"];
+                break;
+            case 2:
+                config.text = @"UTF-8 Safety";
+                config.image = [UIImage systemImageNamed:@"textformat"];
+                break;
+        }
+    } else {
+        config.text = @"Socket Connection";
+        config.image = [UIImage systemImageNamed:@"network"];
+    }
+
+    cell.contentConfiguration = config;
+    return cell;
+}
+
+#pragma mark - UITableViewDelegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    [tableView deselectRowAtIndexPath:indexPath animated:YES];
+
+    UIViewController *vc = nil;
+    if (indexPath.section == DemoSectionCore) {
+        switch (indexPath.row) {
+            case 0:
+                vc = [[StreamBufferDemoViewController alloc] initWithStyle:UITableViewStyleGrouped];
+                break;
+            case 1:
+                vc = [[SSEParserDemoViewController alloc] initWithStyle:UITableViewStyleGrouped];
+                break;
+            case 2:
+                vc = [[UTF8SafetyDemoViewController alloc] initWithStyle:UITableViewStyleGrouped];
+                break;
+        }
+    } else {
+        vc = [[SocketConnectionDemoViewController alloc] initWithStyle:UITableViewStyleGrouped];
+    }
+
+    if (vc) {
+        [self.navigationController pushViewController:vc animated:YES];
+    }
+}
+
+@end

Examples/iOSDemoObjC/iOSDemoObjC/SocketManager.h

@@ -0,0 +1,40 @@
+//
+//  SocketManager.h
+//  iOSDemoObjC
+//
+//  Encapsulates GCDAsyncSocket operations — equivalent of SocketManager.swift
+//  in the Swift demo.
+//
+
+#import <Foundation/Foundation.h>
+#import "GCDAsyncSocket.h"
+#import "GCDAsyncSocketDelegate.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Notification posted when SocketManager state changes (connection, logs, data).
+extern NSNotificationName const SocketManagerDidUpdateNotification;
+
+@interface SocketManager : NSObject
+
+@property (nonatomic, readonly) BOOL isConnected;
+@property (nonatomic, readonly, copy) NSArray<NSString *> *logs;
+@property (nonatomic, readonly, copy) NSData *receivedData;
+@property (nonatomic, readonly, copy) NSString *receivedText;
+@property (nonatomic, readonly, copy) NSArray<NWSSEEvent *> *sseEvents;
+
+- (void)connectToHost:(NSString *)host
+                 port:(uint16_t)port
+               useTLS:(BOOL)useTLS
+            enableSSE:(BOOL)enableSSE
+      enableStreaming:(BOOL)enableStreaming;
+
+- (void)sendText:(NSString *)text;
+- (void)sendData:(NSData *)data;
+- (void)readData;
+- (void)disconnect;
+- (void)clearAll;
+
+@end
+
+NS_ASSUME_NONNULL_END