iOS 想要检查 App 当前版本是否为最新,一般的方案大概都是服务器自己提供一个接口来获取 App 最新版本是多少,然后再做出相应提示是否需要更新,但是接口需要手动维护,应用要审核,还得等审核通过以后才能更新版本号,其实苹果提供了一个 iTunes 接口,能够查到 App 在 AppStore 上的状态信息,既省事又准确,下面记录一下具体实现方法。
接口信息
- 这是 iTunes 接口地址 ,有兴趣可以看一下,我们要用到的接口如下,xxx处换成自己App的AppId,AppId可以在iTunes Connect里面看到。
| http://itunes.apple.com/lookup?id=xxx
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| {"resultCount" : 1,
 "results" : [{
 "artistId" : "开发者 ID",
 "artistName" : "开发者名称",
 "trackCensoredName" : "审查名称",
 "trackContentRating" : "评级",
 "trackId" : "应用程序 ID",
 "trackName" = "应用程序名称",
 "trackViewUrl" = "应用程序下载网址",
 "userRatingCount" = "用户评论数量",
 "userRatingCountForCurrentVersion" = "当前版本的用户评论数量",
 "version" = "版本号"
 }]
 }
 
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实现方法
下面是检查版本更新的具体实现方法,注意接口地址 xxx 处换成自己 App 的 AppId ,App 审核的时候版本肯定是比 AppStore 上高的,所以不用担心审核时会跳出更新提示。
| - (void)checkVersion {
 NSString *url = @"http://itunes.apple.com/lookup?id=xxx";
 [[AFHTTPSessionManager manager] POST:url parameters:nil progress:nil success:^(NSURLSessionDataTask *task, id responseObject) {
 DLog(@"版本更新检查成功");
 NSArray *results = responseObject[@"results"];
 if (results && results.count > 0) {
 NSDictionary *response = results.firstObject;
 NSString *currentVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];
 NSString *lastestVersion = response[@"version"];
 if (currentVersion && lastestVersion && ![self isLastestVersion:currentVersion compare:lastestVersion]) {
 
 UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"检测到有版本更新,是否前往 AppStore 更新版本。" preferredStyle:UIAlertControllerStyleAlert];
 [alert addAction:[UIAlertAction actionWithTitle:@"前往" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
 NSString *trackViewUrl = response[@"trackViewUrl"];
 if (trackViewUrl) {
 NSURL *appStoreURL = [NSURL URLWithString:trackViewUrl];
 if ([[UIApplication sharedApplication] canOpenURL:appStoreURL]) {
 [[UIApplication sharedApplication] openURL:appStoreURL];
 }
 }
 }]];
 [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];
 [self.window.rootViewController presentViewController:alert animated:YES completion:nil];
 }
 }
 } failure:^(NSURLSessionDataTask *task, NSError *error) {
 DLog(@"版本更新检查失败");
 }];
 }
 
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| - (BOOL)isLastestVersion:(NSString *)currentVersion compare:(NSString *)lastestVersion {
 if (currentVersion && lastestVersion) {
 
 NSMutableArray *currentItems = [[currentVersion componentsSeparatedByString:@"."] mutableCopy];
 NSMutableArray *lastestItems = [[lastestVersion componentsSeparatedByString:@"."] mutableCopy];
 
 NSInteger currentCount = currentItems.count;
 NSInteger lastestCount = lastestItems.count;
 if (currentCount != lastestCount) {
 NSInteger count = labs(currentCount - lastestCount);
 for (int i = 0; i < count; ++i) {
 if (currentCount > lastestCount) {
 [lastestItems addObject:@"0"];
 } else {
 [currentItems addObject:@"0"];
 }
 }
 }
 
 BOOL isLastest = YES;
 for (int i = 0; i < currentItems.count; ++i) {
 NSString *currentItem = currentItems[i];
 NSString *lastestItem = lastestItems[i];
 if (currentItem.integerValue != lastestItem.integerValue) {
 isLastest = currentItem.integerValue > lastestItem.integerValue;
 break;
 }
 }
 return isLastest;
 }
 return NO;
 }
 
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