[in_app_purchase] Fix iOS build warning

Author: jmagman

packages/in_app_purchase/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 0.2.1+5
 
 * Define clang module for iOS.
+* Fix iOS build warning
 
 ## 0.2.1+4
 

packages/in_app_purchase/ios/Classes/InAppPurchasePlugin.h

@@ -10,6 +10,7 @@
 
 @property(strong, nonatomic) FIAPaymentQueueHandler *paymentQueueHandler;
 
-- (instancetype)initWithReceiptManager:(FIAPReceiptManager *)receiptManager;
+- (instancetype)initWithReceiptManager:(FIAPReceiptManager *)receiptManager NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
 
 @end

packages/in_app_purchase/ios/Classes/InAppPurchasePlugin.m

@@ -17,7 +17,7 @@ @interface InAppPurchasePlugin ()
 
 // After querying the product, the available products will be saved in the map to be used
 // for purchase.
-@property(copy, nonatomic) NSMutableDictionary *productsCache;
+@property(strong, nonatomic) NSMutableDictionary *productsCache;
 
 // Call back channel to dart used for when a listener function is triggered.
 @property(strong, nonatomic) FlutterMethodChannel *callbackChannel;
@@ -40,19 +40,21 @@ + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
 }
 
 - (instancetype)initWithReceiptManager:(FIAPReceiptManager *)receiptManager {
-  self = [self init];
-  self.receiptManager = receiptManager;
+  self = [super init];
+  _receiptManager = receiptManager;
+  _requestHandlers = [NSMutableSet new];
+  _productsCache = [NSMutableDictionary new];
   return self;
 }
 
 - (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
   self = [self initWithReceiptManager:[FIAPReceiptManager new]];
-  self.registrar = registrar;
-  self.registry = [registrar textures];
-  self.messenger = [registrar messenger];
+  _registrar = registrar;
+  _registry = [registrar textures];
+  _messenger = [registrar messenger];
 
   __weak typeof(self) weakSelf = self;
-  self.paymentQueueHandler =
+  _paymentQueueHandler =
       [[FIAPaymentQueueHandler alloc] initWithQueue:[SKPaymentQueue defaultQueue]
           transactionsUpdated:^(NSArray<SKPaymentTransaction *> *_Nonnull transactions) {
             [weakSelf handleTransactionsUpdated:transactions];
@@ -72,7 +74,7 @@ - (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar
           updatedDownloads:^void(NSArray<SKDownload *> *_Nonnull downloads) {
             [weakSelf updatedDownloads:downloads];
           }];
-  self.callbackChannel =
+  _callbackChannel =
       [FlutterMethodChannel methodChannelWithName:@"plugins.flutter.io/in_app_purchase_callback"
                                   binaryMessenger:[registrar messenger]];
   return self;
@@ -320,20 +322,4 @@ - (SKReceiptRefreshRequest *)getRefreshReceiptRequest:(NSDictionary *)properties
   return [[SKReceiptRefreshRequest alloc] initWithReceiptProperties:properties];
 }
 
-#pragma mark - getter
-
-- (NSSet *)requestHandlers {
-  if (!_requestHandlers) {
-    _requestHandlers = [NSMutableSet new];
-  }
-  return _requestHandlers;
-}
-
-- (NSMutableDictionary *)productsCache {
-  if (!_productsCache) {
-    _productsCache = [NSMutableDictionary new];
-  }
-  return _productsCache;
-}
-
 @end

script/lint_darwin_plugins.sh

@@ -22,7 +22,6 @@ function lint_package() {
   local skip_analysis_packages=(
     "camera.podspec" # https://github.com/flutter/flutter/issues/42673
     "image_picker.podspec" # https://github.com/flutter/flutter/issues/42678
-    "in_app_purchase.podspec" # https://github.com/flutter/flutter/issues/42679
   )
   find "${package_dir}" -type f -name "*\.podspec" | while read podspec; do
     local podspecBasename=$(basename "${podspec}")