如何檢查應用程序的版本並請求用戶更新？

Question

如何檢查用戶是否有我的應用程序的當前版本，並彈出一個消息，要求他們更新的應用程序版本？

喜歡的東西，你會看到下面的東西。

Answer 1

您需要在您的服務器（或類似的東西），你的應用程序要求在啓動時，知道哪些是可用的最新版本上一個WebService。 （如果您沒有WS但真的不希望實現一個，你也可以簡單地使用包含版本的XML或文本文件太）

然後比較這版本從您的服務器中檢索與當前版本的應用程序一起使用，使用[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"]。

如果它們是不同的，則可以顯示alertview並重定向到itms-apps://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftwareUpdate?id=[APPID]&mt=8，這是會讓你的iPhone直接打開AppStore的應用程序應用程序的更新頁面上的鏈接（你iTunes Connect的應用程序ID更換APPID）

Answer 2

我的一個朋友剛剛推出的一項服務，CleverStork，但這幾乎正是你想要的。

我沒有用它自己，但我的理解是，它會提示用戶 - 通過應用程序內的警報 - 下載你的應用程序的新版本。他們提供免費和付費計劃。

Answer 3

要檢查，看看是否有最新的版本只是用下面的查詢查詢的iTunes應用程序數據（注：更改ID，匹配來自iTunesConnect您的應用程序的ID）：

這將返回一個JSON字典很容易轉換爲NSDictionary以便直接在您的代碼中使用，那麼您只需提取「版本」鍵的值並將其與您的應用程序版本號進行比較（請參閱版本鍵/值下面以粗體顯示）：

{ 
    "resultCount": 1, 
    "results": [ 
     { 
      "kind": "software", 
      "features": [], 
      "supportedDevices": [ 
       "all" 
      ], 
      "isGameCenterEnabled": false, 
      "artistViewUrl": "https://itunes.apple.com/us/artist/d-m-holdings/id388608883?uo=4", 
      "artworkUrl60": "http://a899.phobos.apple.com/us/r1000/086/Purple/v4/6d/b3/05/6db305aa-c685-558b-8c8e-8b7245375ce1/IconAudio.png", 
      "screenshotUrls": [ 
       "http://a86.phobos.apple.com/us/r1000/078/Purple/v4/8f/ff/47/8fff4783-f2e4-fe3f-ef92-96d67d66c12b/mzl.dwbdvxny.png", 
       "http://a731.phobos.apple.com/us/r1000/097/Purple/v4/cb/65/f6/cb65f613-408a-dffe-fb36-165db0c1a360/mzl.jexyhdnq.png", 
       "http://a940.phobos.apple.com/us/r1000/097/Purple/v4/f6/26/a1/f626a18c-691f-7345-8d3d-f19713144818/mzl.llsgsagl.png", 
       "http://a185.phobos.apple.com/us/r1000/071/Purple/v4/7d/5e/bc/7d5ebcad-7755-e772-727c-65de99effd60/mzl.zuyvhebk.png", 
       "http://a48.phobos.apple.com/us/r1000/096/Purple/v4/d6/f5/f1/d6f5f108-10ab-3738-26cf-5ce82c6bb690/mzl.ijtyynie.png" 
      ], 
      "ipadScreenshotUrls": [], 
      "artworkUrl512": "http://a672.phobos.apple.com/us/r1000/100/Purple/v4/e3/cb/5d/e3cb5d2d-f1a8-8b80-3a91-58be8f654710/mzm.uogqezwx.png", 
      "artistId": 388608883, 
      "artistName": "D&M Holdings", 
      "price": 0, 
      **"version": "1.0.5",** 
      "description": "Designed to enhance the listening experience with Denon’s new line of Music Maniac™ headphones, the Denon Audio app is designed for the on-the-go audiophile. The Denon Audio app features a premium audio player that lets you experience the best possible sound quality from your iPod music library and favorite Internet radio stations. Create & save custom EQ curves, create & save instant playlists, enjoy internet radio stations via the built-in TuneIn service, and more. The Denon Audio app will quickly replace all of your other music apps.\n \nThe Denon Audio app features a customizable graphical equalizer that lets you contour your own sound by directly manipulating more than 1000 discrete bands of equalization without adding spatial distortion or decreasing sound quality. Pump up the bass, restore those highs, and start jammin’! \n \nEQ FEATURES:\n \n• Graphical equalizer for your iPod music library and streaming Internet Radio\n• 1000 possible discrete bands\n• 10 built in EQ Presets\n• Create and save your own EQ Presets\n• Bypass mode to quickly compare the original and equalized audio\n• Real-time spectrum analyzer\n• Linear phase design\n• No spatial distortion\n\nIPOD MUSIC LIBRARY FEATURES:\n\n• Enhances your listening experience with Denon Music Maniac Headphones or other audio playback devices such as docking stations, a/v receivers, car stereos via USB, Bluetooth, or Airplay.\n• Powerful queue based playback system lets you build and order your own playlist on the fly.\n• Save the playback queue as a new playlist\n• A single song, all songs on an album, all songs by an artist, and all songs in a genre can easily be added to the now playing queue.\n• Supports both portrait and landscape modes for browsing, playing, and equalizing\n• Shuffle and repeat playback modes\n• iPod library browsing by Playlist, Artist, Album, Song, Genre, Composer, Compilation, and Podcast (no importing needed)\n\nINTERNET RADIO FEATURES:\n\n• The TuneIn service provides global access to Internet radio – covering over 70,000 radio stations and 2 million on-demand programs including sports, news, talk, music and comedy. \n• Browse Internet radio stations by location, genre, language or Podcast (on-demand programs).\n• Powerful search feature for your iPod music library and Internet Radio \n• Save your favorite Internet Radio stations or programs as convenient presets and share them with other TuneIn compatible devices\n• Ability to choose high or low quality streams offered by broadcasters\n \nADDITIONAL FEATURES:\n\n• Streams music over AirPlay to any Denon AirPlay compatible receiver or HiFi product\n• Share what you’re listening to via Facebook, Twitter, Email, or Text Message (iMessage)\n\nNOTICES:\n \n• The Denon Audio app requires iOS 5 or later and works with the iPhone 3GS or newer, the iTouch 3rd generation or newer, and all iPads (in 2x mode). \n• DRM protected iTunes music is NOT supported by the Denon Audio app (or any 3rd party music app)\n• iTunes Match will be supported in a future update \n• WiFi or data connection required to stream Internet radio", 
      "currency": "USD", 
      "genres": [ 
       "Music", 
       "Lifestyle" 
      ], 
      "genreIds": [ 
       "6011", 
       "6012" 
      ], 
      "releaseDate": "2012-05-29T07:00:00Z", 
      "sellerName": "D&M Holdings Inc.", 
      "bundleId": "com.dm-holdings.denon-audio", 
      "trackId": 520604518, 
      "trackName": "Denon Audio", 
      "primaryGenreName": "Music", 
      "primaryGenreId": 6011, 
      "releaseNotes": "• Added 4\" display support for the iPhone 5 and 5th generation iPod Touch\n\n• Added an audio limiter function to protect against possible distortion introduced from pushing the EQ too high\n\n• Displays the Shuffle, Repeat, AirPlay, and Share icons as well as the scan/scrub controls on the \"Now Playing\" screen by default (so everyone knows they are included in the app). Tap the cover art to hide/show these controls", 
      "formattedPrice": "Free", 
      "wrapperType": "software", 
      "trackCensoredName": "Denon Audio", 
      "trackViewUrl": "https://itunes.apple.com/us/app/denon-audio/id520604518?mt=8&uo=4", 
      "contentAdvisoryRating": "4+", 
      "artworkUrl100": "http://a672.phobos.apple.com/us/r1000/100/Purple/v4/e3/cb/5d/e3cb5d2d-f1a8-8b80-3a91-58be8f654710/mzm.uogqezwx.png", 
      "languageCodesISO2A": [ 
       "ZH", 
       "DE", 
       "EN", 
       "ES", 
       "FR", 
       "JA", 
       "NL" 
      ], 
      "fileSizeBytes": "9060882", 
      "sellerUrl": "http://www.usa.denon.com/headphones", 
      "averageUserRatingForCurrentVersion": 4.5, 
      "userRatingCountForCurrentVersion": 329, 
      "trackContentRating": "4+", 
      "averageUserRating": 4.5, 
      "userRatingCount": 471 
     } 
    ] 
} 

以下是完成此任務的一些代碼。 -rrh

NSURL *url = [[NSURL alloc] initWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?id=%@",APPSTORE_ID]]; 
NSURLRequest *request = [NSURLRequest requestWithURL:url]; 

[NSURLConnection sendAsynchronousRequest:request 
            queue:[NSOperationQueue mainQueue] 
         completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) { 
          if (!error) { 
           NSError* parseError; 
           NSDictionary *appMetadataDictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&parseError]; 
           NSArray *resultsArray = (appMetadataDictionary)?[appMetadataDictionary objectForKey:@"results"]:nil; 
           NSDictionary *resultsDic = [resultsArray firstObject]; 
           if (resultsDic) { 
            // compare version with your apps local version 
            NSString *iTunesVersion = [resultsDic objectForKey:@"version"]; 

            NSString *appVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString*)@"CFBundleShortVersionString"]; 
            if (iTunesVersion && [appVersion compare:iTunesVersion] != NSOrderedSame) { // new version exists 
             // inform user new version exists, give option that links to the app store to update your app - see AliSoftware's answer for the app update link 
             UIAlertView *alert = [UIAlertView bk_showAlertViewWithTitle:APP_NAME message:[NSString stringWithFormat:@"New version %@ available. Update required.",iTunesVersion] cancelButtonTitle:@"update" otherButtonTitles:nil handler:^(UIAlertView *alertView, NSInteger buttonIndex) { 


             NSString *iTunesLink = [NSString stringWithFormat:@"itms://itunes.apple.com/us/app/apple-store/id%@?mt=8",APPSTORE_ID]; 
             [[UIApplication sharedApplication] openURL:[NSURL URLWithString:iTunesLink]]; 
             }]; 
             [alert show]; 
            } 
           } 
          } else { 
           // error occurred with http(s) request 
           NSLog(@"error occurred communicating with iTunes"); 
          } 
         }];