From 1612716103a48b43c464911d81cf3ca4ec88be77 Mon Sep 17 00:00:00 2001
From: Dan Hillman <dan.hillman@geotogether.com>
Date: Thu, 3 Mar 2022 04:25:13 +0000
Subject: [PATCH] =?UTF-8?q?Updated=20iOS=20CHIP=20tool=20README=20and=20qr?=
 =?UTF-8?q?=20scanner=20to=20indicate=20requirement=20>=E2=80=A6=20(#15715?=
 =?UTF-8?q?)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Updated iOS CHIP tool README and qr scanner to indicate requirement >= iOS 15.4 (#15640)

* Restyled by clang-format

* Restyled by prettier-markdown

Co-authored-by: Restyled.io <commits@restyled.io>
---
 .../View Controllers/RootViewController.m     | 32 ++++++++++++++++---
 src/darwin/CHIPTool/README.md                 |  8 +++++
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/darwin/CHIPTool/CHIPTool/View Controllers/RootViewController.m b/src/darwin/CHIPTool/CHIPTool/View Controllers/RootViewController.m
index 4f40582ae8f295..54fd0d4efc9925 100644
--- a/src/darwin/CHIPTool/CHIPTool/View Controllers/RootViewController.m	
+++ b/src/darwin/CHIPTool/CHIPTool/View Controllers/RootViewController.m	
@@ -70,7 +70,7 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
     [tableView deselectRowAtIndexPath:indexPath animated:YES];
     switch (indexPath.row) {
     case 0:
-        [self pushQRCodeScanner];
+        [self pushQRCodeScannerWithSkipCheck:NO];
         break;
     case 1:
         [self pushEnumeration];
@@ -125,10 +125,34 @@ - (void)pushNetworkConfiguration
     [self.navigationController pushViewController:controller animated:YES];
 }
 
-- (void)pushQRCodeScanner
+- (void)pushQRCodeScannerWithSkipCheck:(BOOL)skipIosCheck
 {
-    QRCodeViewController * controller = [QRCodeViewController new];
-    [self.navigationController pushViewController:controller animated:YES];
+    if (skipIosCheck) {
+        QRCodeViewController * controller = [QRCodeViewController new];
+        [self.navigationController pushViewController:controller animated:YES];
+    } else {
+        if (@available(iOS 15.4, *)) {
+            // Device using the required iOS version (>= 15.4)
+            [self pushQRCodeScannerWithSkipCheck:YES];
+        } else {
+            // Device NOT using the required iOS version (< 15.4)
+            // Show a warning, but let the user continue
+            UIAlertController * alertController =
+                [UIAlertController alertControllerWithTitle:@"Warning"
+                                                    message:@"QRCode scanner to pair a matter device requires iOS >= 15.4"
+                                             preferredStyle:UIAlertControllerStyleAlert];
+            __weak typeof(self) weakSelf = self;
+            [alertController addAction:[UIAlertAction actionWithTitle:@"I understand"
+                                                                style:UIAlertActionStyleDefault
+                                                              handler:^(UIAlertAction * action) {
+                                                                  typeof(self) strongSelf = weakSelf;
+                                                                  if (strongSelf) {
+                                                                      [strongSelf pushQRCodeScannerWithSkipCheck:YES];
+                                                                  }
+                                                              }]];
+            [self presentViewController:alertController animated:YES completion:nil];
+        }
+    }
 }
 
 - (void)pushEnumeration
diff --git a/src/darwin/CHIPTool/README.md b/src/darwin/CHIPTool/README.md
index 904ca30c48e2ff..2a15cb027d9701 100644
--- a/src/darwin/CHIPTool/README.md
+++ b/src/darwin/CHIPTool/README.md
@@ -13,6 +13,14 @@ control.
 
 ---
 
+## Prerequisites
+
+-   Requires building and running the app to a physical device on iOS >= 15.4.
+    -   At time of writing 15.4 is in beta and the current active iOS version is
+        15.3.1. For detailed instructions on how to install the iOS 15.4 beta
+        onto your device visit
+        [beta.apple.com](https://beta.apple.com/sp/betaprogram/enroll#ios)
+
 ## Building the Application
 
 CHIPTool iOS can be built with the latest Xcode releases.