在React Native init项目中设置适用于iOS的Facebook SDK时使用未声明的标识符

Question

我在第5步：连接iOS SDK SDK的入门应用代表。

我按照说明将代码添加到AppDelegate.m文件中。 但是，我收到以下错误消息：使用未声明的标识符'application'，其中代码读取application：application。

我想第二个“应用程序”必须用其他东西替换，但我不知道是什么。

这是我的AppDeleage.m文件中当前的代码。 该文件是使用react-native init MyAppName生成的，并根据Facebook的说明进行了修改。

/**
 * 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

在您的application:openURL:options实现，该参数名为app而不是application 。

您可以将方法签名中的参数名称更改为application ：

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

或致电到时，您可以更改参数FBSDKApplicationDelegate方法app ：

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