在 React Native init 项目中为 iOS 设置 Facebook SDK 时使用未声明的标识符

Question

我在第 5 步：连接 App Delegate of Getting Started with the Facebook SDK for iOS。

我已AppDelegate.m按照说明将代码添加到文件中。但是，我收到以下错误消息：使用未声明的标识符“应用程序”，其中代码读取应用程序：应用程序。

我想第二个“应用程序”必须用其他东西代替，但我不知道是什么。

这是当前在我的AppDeleage.m文件中的代码。该文件是react-native init MyAppName根据 Facebook 的说明使用和修改的。

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#import "AppDelegate.h"

#import "RCTBundleURLProvider.h"
#import "RCTRootView.h"
#import <FBSDKCoreKit/FBSDKCoreKit.h>

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  NSURL *jsCodeLocation;

  jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                      moduleName:@"myAppName"
                                               initialProperties:nil
                                                   launchOptions:launchOptions];
  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [UIViewController new];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;
  [self.window makeKeyAndVisible];

  [[FBSDKApplicationDelegate sharedInstance] application:application
                           didFinishLaunchingWithOptions:launchOptions];
  // Add any custom logic here.
  return YES;

}

- (BOOL)application:(UIApplication *)app
              openURL:(NSURL *)url
              options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options {

    BOOL handled = [[FBSDKApplicationDelegate sharedInstance] application:application
                                                                  openURL:url
                                                        sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey]
                                                               annotation:options[UIApplicationOpenURLOptionsAnnotationKey]
                    ];
    // Add any custom logic here.
    return handled;
  }

@end

Answer 1

In your application:openURL:options implementation, the parameter is named app and not application.

You can either change the parameter name in the method signature to application:

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
            options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options

Or you can change the parameter when calling to the FBSDKApplicationDelegate method to app:

BOOL handled = [[FBSDKApplicationDelegate sharedInstance] application:app
                                                              openURL:url
                                                    sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey]
                                                           annotation:options[UIApplicationOpenURLOptionsAnnotationKey]];