我可以强制 iPhone 用户升级应用程序吗？

大家好，如果你们需要帮助，我发现了这个教程，应该能对大家有所帮助，它也帮助了我。

http://codewithchris.com/tutorial-how-to-implement-in-app-update-functionality-in-your-iphoneipad-app/

编辑（你的代码应该类似于以下内容）：

// Try to get version 
NSString *versionNumber = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];

NSURL *updateUrl = [NSURL URLWithString:@"http://yourdomain.com/yourupdatefile.xml"];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:updateUrl
                                            cachePolicy:NSURLCacheStorageNotAllowed
                                        timeoutInterval:20.0];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:urlRequest
                                     returningResponse:&response
                                                 error:&error];
// Check no error, then parse data
if (error == nil)
{
    // Parse response into a dictionary
    NSPropertyListFormat format;
    NSString *errorStr = nil;
    NSDictionary *dictionary = [NSPropertyListSerialization propertyListFromData:data
                                                                mutabilityOption:NSPropertyListImmutable
                                                                          format:&format
                                                                errorDescription:&errorStr];        
    if (errorStr == nil)
    {
        @try {

            // Try to see if the current app version exists in the update xml
            NSString *itunesUrl = [dictionary objectForKey:versionNumber];

            if (itunesUrl)
            {
                // Show dialog to ask user to update!
            }
            else {
                // Version not in XML
            }
        } @catch (NSException *e) {
            // Error with retrieving the key
        }
    }
    else {
        // Error with parsing data into dictionary
    }
}

-(BOOL) needsUpdate{
    NSDictionary* infoDictionary = [[NSBundle mainBundle] infoDictionary];
    NSString* appID = infoDictionary[@"CFBundleIdentifier"];
    NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@", appID]];
    NSData* data = [NSData dataWithContentsOfURL:url];
    NSDictionary* lookup = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

    if ([lookup[@"resultCount"] integerValue] == 1){
        NSString* appStoreVersion = lookup[@"results"][0][@"version"];
        NSString* currentVersion = infoDictionary[@"CFBundleShortVersionString"];
        if (![appStoreVersion isEqualToString:currentVersion]){
            NSLog(@"Need to update [%@ != %@]", appStoreVersion, currentVersion);
            return YES;
        }
    }
    return NO;
}

在以下内容中：

if (![appStoreVersion isEqualToString:currentVersion]){
                NSLog(@"Need to update [%@ != %@]", appStoreVersion, currentVersion);
                return YES;
            }

代码的一部分是当版本不相等时确定你想要达到的目标，这是你将用户发送到应用商店下载最新版本的位置。

func appUpdateAvailable() -> (Bool,String?) {
        
        guard let info = Bundle.main.infoDictionary,
              let identifier = info["CFBundleIdentifier"] as? String else {
            return (false,nil)
        }
        
//        let storeInfoURL: String = "http://itunes.apple.com/lookup?bundleId=\(identifier)&country=IN"
        let storeInfoURL:String = "https://itunes.apple.com/in/lookup?bundleId=\(identifier)"
        var upgradeAvailable = false
        var versionAvailable = ""
        // Get the main bundle of the app so that we can determine the app's version number
        let bundle = Bundle.main
        if let infoDictionary = bundle.infoDictionary {
            // The URL for this app on the iTunes store uses the Apple ID for the  This never changes, so it is a constant
            let urlOnAppStore = NSURL(string: storeInfoURL)
            if let dataInJSON = NSData(contentsOf: urlOnAppStore! as URL) {
                // Try to deserialize the JSON that we got
                if let dict: NSDictionary = try? JSONSerialization.jsonObject(with: dataInJSON as Data, options: JSONSerialization.ReadingOptions.allowFragments) as! [String: AnyObject] as NSDictionary? {
                    if let results:NSArray = dict["results"] as? NSArray {
                        if let version = (results[0] as! [String:Any])["version"] as? String {
                            // Get the version number of the current version installed on device
                            if let currentVersion = infoDictionary["CFBundleShortVersionString"] as? String {
                                // Check if they are the same. If not, an upgrade is available.
                                print("\(version)")
                                if version != currentVersion {
                                    upgradeAvailable = true
                                    versionAvailable = version
                                }
                            }
                        }
                    }
                }
            }
        }
        return (upgradeAvailable,versionAvailable)
    }

if let url = URL(string: "https://apps.apple.com/tr/app/--id--") {
    UIApplication.shared.open(url)
}

苹果不提供任何自动化的方式来完成这个任务，你需要手动编写。

选项1：可以使用iTunes API检查特定应用程序ID的最新版本，并显示弹出窗口以更新应用程序。 选项2：您可以使用自己的服务器来检查最新版本。但是，每当任何更新发布到苹果应用商店时，您都必须更新您的服务器。

您可以使用以下网址获取任何应用程序的信息，只需知道您的应用程序的Apple ID。

您可以在itunesconnect.com>您的应用程序>应用程序信息页面中获取此Apple ID。

GET: http://itunes.apple.com/lookup?id=