添加链接 注册    登录
link管理
链接快照平台
  • 输入网页链接，自动生成快照
  • 标签化管理网页链接
相关文章推荐
高大的春卷  ·  理解Sass中变量作用域 | Sass中文网·  2 天前    · 
听话的吐司  ·  sqlplus连接远程数据库的方法及技巧 ...·  1 月前    · 
爱听歌的刺猬  ·  Turkish Lira / ...·  3 月前    · 
骑白马的羽毛球  ·  本地-三峡宜昌网·  4 月前    · 
深沉的卡布奇诺  ·  完全杀人剧场(电影)·  5 月前    · 
朝气蓬勃的火腿肠  ·  [22007] ...·  6 月前    · 
link管理  ›  Background fetch – hiroakit.com
info background
https://www.hiroakit.com/archives/20181029/
重情义的电池
3 月前
Appleは App Programming Guide for iOS - Fetching Small Amounts of Content Opportunistically でBackground fetchを以下のように紹介しています。定期的にコンテンツを確認する必要があるようなアプリでは有効かもしれません。

Apps that need to check for new content periodically can ask the system to wake them up so that they can initiate a fetch operation for that content. 出典: App Programming Guide for iOS - Fetching Small Amounts of Content Opportunistically

ただ、Background fetchはその「定期的」にというところについては保証はしておらず、システムがバランスを見てフェッチをすると説明が続いています。

Enabling this mode is not a guarantee that the system will give your app any time to perform background fetches. The system must balance your app’s need to fetch content with the needs of other apps and the system itself. After assessing that information, the system gives time to apps when there are good opportunities to do so. 出典: App Programming Guide for iOS - Fetching Small Amounts of Content Opportunistically

そのため、 Background fetch は処理可能な時にやってくれればいいな (e.g., 最新のトレンド情報のダウンロードなど) といったような興味関心は高いが重要ではない情報を取得するなどの処理において有効で、毎時に必ず処理をさせないとアプリの動作が成り立たないような場合には不向きだと私は思います。

例えば、 Background fetch の用例としてWWDC 2013のセッション What's New with Multitasking (25:30) では具体例を以下のように述べています。

また、同セッションの36:05では以下のように Background fetch を説明しています。 

func application(_ application: UIApplication,
                 didFinishLaunchingWithOptions launchOptions:
                 [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
   // Override point for customization after application launch.
   // Fetch data once an hour.
   UIApplication.shared.setMinimumBackgroundFetchInterval(3600)
   // Other initialization…
   return true
func application(_ application: UIApplication, 
                 performFetchWithCompletionHandler completionHandler:
                 @escaping (UIBackgroundFetchResult) -> Void) {
   // Check for new data. 
   if let newData = fetchUpdates() {
      addDataToFeed(newData: newData)
      completionHandler(.newData)
   completionHandler(.noData)

  • UIApplication.shared.setMinimumBackgroundFetchInterval の設定
    • 

  • UIApplicationDelegateの performFetchWithCompletionHandler を実装
    • 

    コーディングに入る前にXcodeのCapabilitiesに Background fetch をONにしておきます。
    
UIApplication.shared.setMinimumBackgroundFetchInterval
 UIApplication.shared.setMinimumBackgroundFetchInterval(3600) とありますが、このメソッドはアプリが別のバックグラウンドのフェッチ処理が開始されるまでの最小間隔(秒, TimeInterval) で設定します。
    
ですので、この3600の場合は前回のフェッチ処理から少なくとも1時間は間隔を空けるという意味で、1時間毎にフェッチ処理をするというわけではありません。24時間待たないとフェッチ処理が実行されないこともあります。(後述の「Background fetchの実行タイミング」を参照)
    
上のコードでは具体的な数値を指定していますがUI Kitは以下の定数を提供しています。
    
UIApplicationBackgroundFetchIntervalMinimum
システム (OS?) がサポートする最小のフェッチ間隔
UIApplicationBackgroundFetchIntervalNever
フェッチ操作を発生させないのに十分なフェッチ間隔

    21:11:41.181096 +0900 MyApp [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is inactive, launchOptions: [:]
21:11:41.471603 +0900 MyApp [Debug] [main] [AppDelegate.swift:80] applicationDidBecomeActive >
    

    01:02:14.281226 +0900 MyApp [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
01:02:14.389329 +0900 assertiond [MyApp:1663] Mutating assertion reason from finishTask to finishTaskAfterBackgroundContentFetching
    
「24時間待たないとフェッチ処理が実行されないこともあります」と述べましたが、アプリにログを仕込みBackground fetchがいつ実行されるのか確認してみました。
    
以下の状況で採取できたログです。
    

  • 28日19時から翌日2時という時間帯でアプリをデバッグ実行していた
    • 

  • アプリケーションは29日の午前中にはアプリをホームボタンを押してアプリスイッチャー？でプロセスをキルした
    • 

    以下のログからBackground fetchは19時から翌日2時の時間帯に実行されていることがわかります。
    

    -- ** ** ** --
2018-10-29 19:25:05.406 [Info] > MyApp Version: 1.0 Build: 1 PID: 3634
2018-10-29 19:25:05.406 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-29 19:25:05.444 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-29 19:25:05.448 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-29 19:25:05.568 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 19:35:30.696 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 19:43:12.772 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 21:01:37.929 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 21:09:46.785 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 22:47:11.125 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-29 22:55:41.236 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-30 00:18:34.926 [Info] > MyApp Version: 1.0 Build: 1 PID: 3861
2018-10-30 00:18:34.926 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-30 00:18:34.949 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-30 00:18:34.952 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-30 00:18:35.031 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 00:28:02.364 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 01:18:14.264 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 01:31:08.027 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 01:49:04.158 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 01:56:52.817 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-30 19:30:08.932 [Info] > MyApp Version: 1.0 Build: 1 PID: 4899
2018-10-30 19:30:08.932 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-30 19:30:08.943 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-30 19:30:08.947 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-30 19:30:08.981 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 19:37:43.063 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 19:45:49.483 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 19:53:37.541 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 21:02:24.018 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 21:10:41.350 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 22:44:30.491 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 22:52:11.947 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-30 22:56:18.155 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-31 00:14:46.279 [Info] > MyApp Version: 1.0 Build: 1 PID: 5349
2018-10-31 00:14:46.279 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-31 00:14:46.302 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-31 00:14:46.305 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-31 00:14:46.432 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 00:23:48.008 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-31 01:16:28.601 [Info] > MyApp Version: 1.0 Build: 1 PID: 5446
2018-10-31 01:16:28.601 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-31 01:16:28.638 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-31 01:16:28.642 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-31 01:16:28.755 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 01:24:13.349 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 02:06:33.825 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-31 19:19:39.017 [Info] > MyApp Version: 1.0 Build: 1 PID: 6829
2018-10-31 19:19:39.017 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-31 19:19:39.052 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-31 19:19:39.059 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-31 19:19:39.315 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 19:28:39.584 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 19:36:31.353 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 19:46:42.527 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-10-31 21:03:48.255 [Info] > MyApp Version: 1.0 Build: 1 PID: 7050
2018-10-31 21:03:48.255 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-10-31 21:03:48.268 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-10-31 21:03:48.271 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-10-31 21:03:48.330 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-10-31 21:13:06.858 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-01 19:25:54.004 [Info] > MyApp Version: 1.0 Build: 1 PID: 8364
2018-11-01 19:25:54.004 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-01 19:25:54.046 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-01 19:25:54.126 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-01 19:25:54.443 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-01 19:34:58.677 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-01 19:49:24.111 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-01 20:56:24.998 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-01 21:03:56.731 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-01 22:42:28.030 [Info] > MyApp Version: 1.0 Build: 1 PID: 8533
2018-11-01 22:42:28.030 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-01 22:42:28.049 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-01 22:42:28.051 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-01 22:42:28.101 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-01 22:50:41.573 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 00:15:16.383 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 00:23:25.081 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 01:12:35.428 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 01:23:47.880 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 02:11:50.440 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-02 19:26:46.920 [Info] > MyApp Version: 1.0 Build: 1 PID: 9566
2018-11-02 19:26:46.920 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-02 19:26:46.940 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-02 19:26:46.945 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-02 19:26:47.079 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 19:36:23.698 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 19:46:44.880 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 19:54:49.379 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 20:57:47.740 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 22:44:51.140 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-02 22:53:48.308 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 00:13:10.338 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 01:14:49.791 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 01:24:01.585 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 02:05:18.213 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 02:14:27.294 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-03 19:19:00.938 [Info] > MyApp Version: 1.0 Build: 1 PID: 10401
2018-11-03 19:19:00.938 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-03 19:19:00.972 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-03 19:19:00.978 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-03 19:19:01.119 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 19:30:48.459 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 19:38:24.244 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 19:46:47.648 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-03 21:01:00.256 [Info] > MyApp Version: 1.0 Build: 1 PID: 10536
2018-11-03 21:01:00.256 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-03 21:01:00.270 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-03 21:01:00.273 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-03 21:01:00.390 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
-- ** ** ** --
2018-11-03 22:41:41.486 [Info] > MyApp Version: 1.0 Build: 1 PID: 10707
2018-11-03 22:41:41.486 [Info] > XCGLogger Version: 6.1.0 - Level: Debug
2018-11-03 22:41:41.509 [Info] > XCGLogger appending log to: file:///var/mobile/Containers/Data/Application/8FCD9D25-3958-47BC-A7D5-DF9606D9B47F/Documents/logs/app.log
2018-11-03 22:41:41.514 [Debug] [main] [AppDelegate.swift:31] application(_:didFinishLaunchingWithOptions:) > Application state is background, launchOptions: [:]
2018-11-03 22:41:41.750 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-03 22:53:42.933 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-04 00:17:27.723 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-04 00:25:31.428 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-04 01:27:09.105 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
2018-11-04 01:59:35.555 [Debug] [main] [AppDelegate.swift:55] application(_:performFetchWithCompletionHandler:) > Application state is background.
    

  • フェッチの最小間隔は指定できますが、フェッチの実行タイミングは指定できません
    • 

  • フェッチが始まると10秒から30秒までの間に処理を終わらす必要があるとされていますが根拠は明らかではありません
    • 

  • フェッチは24時間後に実行される (少なくとも24時間以内に実行される保証はない)
    • 

  • 上記の理由から、フェッチで取得しようとしている情報が取得ができていなくても大丈夫なようにアプリを設計する必要があります
    • 

  • App Programming Guide for iOS - Fetching Small Amounts of Content Opportunistically
    • 

  • Updating Your App with Background App Refresh
    • 

  • WWDC 2013 What's New with Multitasking
    •
     
    推荐文章
    高大的春卷  ·  理解Sass中变量作用域 | Sass中文网
    2 天前
    听话的吐司  ·  sqlplus连接远程数据库的方法及技巧 - 果核剥壳
    1 月前
    爱听歌的刺猬  ·  Turkish Lira / Hongkong-Dollar (TRY/HKD): Valuta Prezzo| TRYHKD | MarketScreener
    3 月前
    骑白马的羽毛球  ·  本地-三峡宜昌网
    4 月前
    深沉的卡布奇诺  ·  完全杀人剧场(电影)
    5 月前
    朝气蓬勃的火腿肠  ·  [22007] [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]从字符串转换日期和/或时间时，转换失败。 (241)过滤非法日期格式数据_s
    6 月前
    Link管理   ·   51好读   ·   Sov5搜索   ·   小百科
    link管理 - 链接快照平台