Added iOS example for add-to-app Pigeon (#722)

add_to_app/books/ios_books/IosBooks/api.m

@@ -0,0 +1,122 @@
+// Autogenerated from Pigeon (v0.1.17), do not edit directly.
+// See also: https://pub.dev/packages/pigeon
+#import "api.h"
+#import <Flutter/Flutter.h>
+
+#if !__has_feature(objc_arc)
+#error File requires ARC to be enabled.
+#endif
+
+static NSDictionary* wrapResult(NSDictionary *result, FlutterError *error) {
+  NSDictionary *errorDict = (NSDictionary *)[NSNull null];
+  if (error) {
+    errorDict = [NSDictionary dictionaryWithObjectsAndKeys:
+        (error.code ? error.code : [NSNull null]), @"code",
+        (error.message ? error.message : [NSNull null]), @"message",
+        (error.details ? error.details : [NSNull null]), @"details",
+        nil];
+  }
+  return [NSDictionary dictionaryWithObjectsAndKeys:
+      (result ? result : [NSNull null]), @"result",
+      errorDict, @"error",
+      nil];
+}
+
+@interface BKBook ()
++(BKBook*)fromMap:(NSDictionary*)dict;
+-(NSDictionary*)toMap;
+@end
+
+@implementation BKBook
++(BKBook*)fromMap:(NSDictionary*)dict {
+  BKBook* result = [[BKBook alloc] init];
+  result.title = dict[@"title"];
+  if ((NSNull *)result.title == [NSNull null]) {
+    result.title = nil;
+  }
+  result.subtitle = dict[@"subtitle"];
+  if ((NSNull *)result.subtitle == [NSNull null]) {
+    result.subtitle = nil;
+  }
+  result.author = dict[@"author"];
+  if ((NSNull *)result.author == [NSNull null]) {
+    result.author = nil;
+  }
+  result.summary = dict[@"summary"];
+  if ((NSNull *)result.summary == [NSNull null]) {
+    result.summary = nil;
+  }
+  result.publishDate = dict[@"publishDate"];
+  if ((NSNull *)result.publishDate == [NSNull null]) {
+    result.publishDate = nil;
+  }
+  result.pageCount = dict[@"pageCount"];
+  if ((NSNull *)result.pageCount == [NSNull null]) {
+    result.pageCount = nil;
+  }
+  return result;
+}
+-(NSDictionary*)toMap {
+  return [NSDictionary dictionaryWithObjectsAndKeys:(self.title ? self.title : [NSNull null]), @"title", (self.subtitle ? self.subtitle : [NSNull null]), @"subtitle", (self.author ? self.author : [NSNull null]), @"author", (self.summary ? self.summary : [NSNull null]), @"summary", (self.publishDate ? self.publishDate : [NSNull null]), @"publishDate", (self.pageCount ? self.pageCount : [NSNull null]), @"pageCount", nil];
+}
+@end
+
+@interface BKFlutterBookApi ()
+@property (nonatomic, strong) NSObject<FlutterBinaryMessenger>* binaryMessenger;
+@end
+
+@implementation BKFlutterBookApi
+- (instancetype)initWithBinaryMessenger:(NSObject<FlutterBinaryMessenger>*)binaryMessenger {
+  self = [super init];
+  if (self) {
+    self.binaryMessenger = binaryMessenger;
+  }
+  return self;
+}
+
+- (void)displayBookDetails:(BKBook*)input completion:(void(^)(NSError* _Nullable))completion {
+  FlutterBasicMessageChannel *channel =
+    [FlutterBasicMessageChannel
+      messageChannelWithName:@"dev.flutter.pigeon.FlutterBookApi.displayBookDetails"
+      binaryMessenger:self.binaryMessenger];
+  NSDictionary* inputMap = [input toMap];
+  [channel sendMessage:inputMap reply:^(id reply) {
+    completion(nil);
+  }];
+}
+@end
+void BKHostBookApiSetup(id<FlutterBinaryMessenger> binaryMessenger, id<BKHostBookApi> api) {
+  {
+    FlutterBasicMessageChannel *channel =
+      [FlutterBasicMessageChannel
+        messageChannelWithName:@"dev.flutter.pigeon.HostBookApi.cancel"
+        binaryMessenger:binaryMessenger];
+    if (api) {
+      [channel setMessageHandler:^(id _Nullable message, FlutterReply callback) {
+        FlutterError *error;
+        [api cancel:&error];
+        callback(wrapResult(nil, error));
+      }];
+    }
+    else {
+      [channel setMessageHandler:nil];
+    }
+  }
+  {
+    FlutterBasicMessageChannel *channel =
+      [FlutterBasicMessageChannel
+        messageChannelWithName:@"dev.flutter.pigeon.HostBookApi.finishEditingBook"
+        binaryMessenger:binaryMessenger];
+    if (api) {
+      [channel setMessageHandler:^(id _Nullable message, FlutterReply callback) {
+        FlutterError *error;
+        BKBook *input = [BKBook fromMap:message];
+        [api finishEditingBook:input error:&error];
+        callback(wrapResult(nil, error));
+      }];
+    }
+    else {
+      [channel setMessageHandler:nil];
+    }
+  }
+}