服务器：海外服

平台：iOS

项目临近发布前测试发现的，具体表现为在iOS设备上，使用TapTap登录，输入完账号密码后点击登录游戏无反应，再次点击需要再次登录。

排查过程

查找过程中发现成功拉起TapTap登录没有异常，但是在TapTap上点击登录后游戏没有收到任何回调。

正常情况下，点击登录之后SDK会调用对应的回调方法，包括：

登录成功（OnLoginSuccess）

登录失败（OnLoginError）

登录取消（OnLoginCancel）

最终在TapSDK的同学帮助下定位了问题，本应由TapSDK传给客户端的消息被AppsFlyer拦截了。。

相关AppsFlyer代码如下：

//  AppsFlyerAppController.mm
//  Unity-iPhone
//
//  Created by Jonathan Wesfield on 30/07/2019.
//
 
#import <Foundation/Foundation.h>
#import "UnityAppController.h"
#import "AppDelegateListener.h"
#import "AppsFlyeriOSWrapper.h"
#if __has_include(<AppsFlyerLib/AppsFlyerLib.h>)
#import <AppsFlyerLib/AppsFlyerLib.h>
#else
#import "AppsFlyerLib.h"
#endif
#import <objc/message.h>
 
/**
 Note if you would like to use method swizzeling see AppsFlyer+AppController.m
 If you are using swizzeling then comment out the method that is being swizzeled in AppsFlyerAppController.mm
 Only use swizzeling if there are conflicts with other plugins that needs to be resolved.
*/
 
 
@interface AppsFlyerAppController : UnityAppController <AppDelegateListener>
{
    BOOL didEnteredBackGround;
}
@end
 
@implementation AppsFlyerAppController
 
- (instancetype)init
{
    self = [super init];
    if (self) {
         
        id swizzleFlag = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"AppsFlyerShouldSwizzle"];
        BOOL shouldSwizzle = swizzleFlag ? [swizzleFlag boolValue] : NO;
         
        if(!shouldSwizzle){
            UnityRegisterAppDelegateListener(self);
        }
    }
    return self;
}
 
- (void)didFinishLaunching:(NSNotification*)notification {
    NSLog(@"got didFinishLaunching = %@",notification.userInfo);
 
 
    if (_AppsFlyerdelegate == nil) {
        _AppsFlyerdelegate = [[AppsFlyeriOSWarpper alloc] init];
    }
    [[AppsFlyerLib shared] setDelegate:_AppsFlyerdelegate];
 
    if (notification.userInfo[@"url"]) {
        [self onOpenURL:notification];
    }
}
 
-(void)didBecomeActive:(NSNotification*)notification {
    NSLog(@"got didBecomeActive(out) = %@", notification.userInfo);
    if (didEnteredBackGround == YES && AppsFlyeriOSWarpper.didCallStart == YES) {
        [[AppsFlyerLib shared] start];
        didEnteredBackGround = NO;
    }
}
 
- (void)didEnterBackground:(NSNotification*)notification {
    NSLog(@"got didEnterBackground = %@", notification.userInfo);
    didEnteredBackGround = YES;
}
 
- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void (^)(NSArray *))restorationHandler {
    [super application:application continueUserActivity:userActivity restorationHandler:restorationHandler];
    [[AppsFlyerAttribution shared] continueUserActivity:userActivity restorationHandler:restorationHandler];
    return YES;
}
 
-(BOOL) application:(UIApplication *)application openURL:(NSURL *)url options:(NSDictionary *)options {
    NSLog(@"got openUrl: %@",url);
    [super application:application openURL:url options:options];
    [[AppsFlyerAttribution shared] handleOpenUrl:url options:options];
    return NO;
}
 
- (void)onOpenURL:(NSNotification*)notification {
    NSLog(@"got onOpenURL = %@", notification.userInfo);
    NSURL *url = notification.userInfo[@"url"];
    NSString *sourceApplication = notification.userInfo[@"sourceApplication"];
     
    if (sourceApplication == nil) {
        sourceApplication = @"";
    }
     
    if (url != nil) {
        [[AppsFlyerAttribution shared] handleOpenUrl:url sourceApplication:sourceApplication annotation:nil];
    }
     
}
 
- (void)didReceiveRemoteNotification:(NSNotification*)notification {
    NSLog(@"got didReceiveRemoteNotification = %@", notification.userInfo);
    [[AppsFlyerLib shared] handlePushNotification:notification.userInfo];
}
 
@end
 
IMPL_APP_CONTROLLER_SUBCLASS(AppsFlyerAppController)
 
 
/**
Note if you would not like to use IMPL_APP_CONTROLLER_SUBCLASS you can replace it with the code below.
 <code>
 +(void)load
 {
 [AppsFlyerAppController plugin];
 }
  
 // Singleton accessor.
 + (AppsFlyerAppController *)plugin
 {
 static AppsFlyerAppController *sharedInstance = nil;
 static dispatch_once_t onceToken;
  
 dispatch_once(&onceToken, ^{
  
 sharedInstance = [[AppsFlyerAppController alloc] init];
 });
  
 return sharedInstance;
 }
</code>
 **/

首先TapTap的跳转登录是通过修改UnityAppController中的openURL等相关函数实现的；

而该SDK通过 IMPL_APP_CONTROLLER_SUBCLASS(AppsFlyerAppController) 将自己的AppController文件替换掉了原本的UnityAppController，导致原先TapTap SDK的代码没有生效，以至于无法接收到登录回调，最后无法登录。。

解决方法

1. 删除AppsFlyer；
2. 在AppsFlyer的AppController中调用原UnityAppController的函数；

这两种方法都可以，国内版不需要AppsFlyer所以可以删掉。但是海外版还是需要该SDK的。

考虑到该AppController类继承自UnityAppController，最终采用了方法2，以openURL函数为例：

-(BOOL) application:(UIApplication *)application openURL:(NSURL *)url options:(NSDictionary *)options {
NSLog(@"got openUrl: %@",url);
[super application:application openURL:url options:options];
[[AppsFlyerAttribution shared] handleOpenUrl:url options:options];
return NO;
}

增加 [super application:application openURL:url options:options]; 语句，重新调用了父类UnityAppController的openURL函数，使得游戏可以正常接受来自TapSDK的信息，成功登录。

同时，假如以后不需要该SDK了，可以直接删除而不用修改代码（删除之后会默认使用原有的UnityAppController）。

反思

我的锅。。其实以我的计划来说，AppsFlyer已经接入游戏，但还没有经过测试，这次出版本来不及，所以我加了开关给关掉了。

可是万万没想到AppsFlyer SDK还有替换AppController这一手，我接了那么多SDK第一次见，还是我太naive了。。。

辛苦几位同事大半夜还在找bug，这里说声抱歉 Orz

记一次由接入AppsFlyer导致海外iOS无法登录的问题最先出现在初晴神社。