Add example app runner for iOS

examples/Host/iOS/ExampleViewController.mm

@@ -0,0 +1,75 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#import "ExampleViewController.h"
+
+#include "../../ExampleAppList.hpp"
+
+@implementation MainMenuViewController
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.view.backgroundColor = [UIColor whiteColor];
+	
+	CGFloat buttonHeight = 50;
+	CGFloat buttonSpacing = 10;
+	CGFloat topMargin = 50;
+	
+	int i = 0;
+	for (const auto& app : OpenVulkano::EXAMPLE_APPS)
+	{
+		UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
+		button.frame = CGRectMake(20,
+								  topMargin + i * (buttonHeight + buttonSpacing),
+								  self.view.bounds.size.width - 40,
+								  buttonHeight);
+		[button setTitle:[NSString stringWithUTF8String:app.first] forState:UIControlStateNormal];
+		button.tag = i;
+		[button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
+		[self.view addSubview:button];
+		i++;
+	}
+	
+	self.view.frame = [UIScreen mainScreen].bounds;
+	self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+}
+
+- (void)buttonPressed:(UIButton *)sender {
+	ExampleViewController* example = [[ExampleViewController alloc] init];
+	example.exampleId = sender.tag;
+	example.modalPresentationStyle = UIModalPresentationFullScreen;
+	[self presentViewController:example animated:true completion:nil];
+}
+
+- (void)viewDidLayoutSubviews {
+	[super viewDidLayoutSubviews];
+	self.view.frame = self.view.superview.bounds;
+}
+@end
+
+@implementation ExampleViewController
+- (void)viewDidLoad {
+	self.renderView = [[OpenVulkanoView alloc] initWithFrame:self.view.frame];
+	self.openVulkanoView = self.renderView;
+	[self.view addSubview:self.renderView];
+	[super viewDidLoad];
+	
+	self.view.frame = [UIScreen mainScreen].bounds;
+	self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+}
+
+- (void)viewDidLayoutSubviews {
+	[super viewDidLayoutSubviews];
+	self.view.frame = self.view.superview.bounds;
+	self.renderView.frame = self.view.frame;
+}
+
+- (BOOL)prefersStatusBarHidden { return true; }
+
+- (void *)makeGraphicsApp {
+	return OpenVulkano::EXAMPLE_APPS[self.exampleId].second();
+}
+@end