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如果我们要检测app版本的更新，那么我们必须获取当前运行app版本的版本信息和appstore 上发布的最新版本的信息。
当前运行版本信息可以通过info.plist文件中的 version中获取：
NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
NSString *currentVersion = [infoDic objectForKey:@"CFBundleShortVersionString"];
这样就获取到当前运行的app的版本了
具体步骤如下：
1，用 POST 方式发送请求：
http://itunes.apple.com/lookup?id=你的应用程序的ID
#define APP_URL http://itunes.apple.com/lookup?id=你的应用程序的ID
你的应用程序的ID 是 itunes connect里的 Apple ID
NSString *URL = @"http://itunes.apple.com/lookup";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:URL]];
[request setHTTPMethod:@"POST"];
// ? 数据体
NSString *str = [NSString stringWithFormat:@"id=你的应用程序的ID"];
// 将字符串转换成数据
request.HTTPBody = [str dataUsingEncoding:NSUTF8StringEncoding];
NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
// 开始工作,在很多多线程技术中,start run
dispatch_async(dispatch_queue_create("demo", DISPATCH_QUEUE_CONCURRENT), ^{
[connection start];
});
NSURLConnection 代理中获取数据处理数据－这里不多说了。。
2，从获得的 response 数据中解析需要的数据。因为从 appstore 查询得到的信息是 JSON 格式的，所以需要经过解析。解析之后得到的原始数据就是如下这个样子的：
{
resultCount = 1;
results = (
{
artistId = 开发者 ID;
artistName = 开发者名称;
price = 0;
isGameCenterEnabled = 0;
kind = software;
languageCodesISO2A = (
EN
);
trackCensoredName = 审查名称;
trackContentRating = 评级;
trackId = 应用程序 ID;
trackName = 应用程序名称";
trackViewUrl = 应用程序介绍网址;
userRatingCount = 用户评级;
userRatingCountForCurrentVersion = 1;
version = 版本号;
wrapperType = software;
}
);
}
然后从中取得 results 数组即可，具体代码如下所示：
NSDictionary *jsonData = [dataPayload JSONValue];
NSArray *infoArray = [jsonData objectForKey:@"results"];
NSDictionary *releaseInfo = [infoArray objectAtIndex:0];
NSString *latestVersion = [releaseInfo objectForKey:@"version"];
NSString *trackViewUrl = [releaseInfo objectForKey:@"trackViewUrl"];
如果你拷贝 trackViewUrl 的实际地址，然后在浏览器中打开，就会打开你的应用程序在 appstore 中的介绍页面。当然我们也可以在代码中调用 safari 来打开它。
UIApplication *application = [UIApplication sharedApplication];
[application openURL:[NSURL URLWithString:trackViewUrl]];
代码如下：
-(void)onCheckVersion
{
NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
NSString *currentVersion = [infoDic objectForKey:@"CFBundleVersion"];
NSString *URL = @"http://itunes.apple.com/lookup?id=你的应用程序的ID";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:URL]];
[request setHTTPMethod:@"POST"];
NSHTTPURLResponse *urlResponse = nil;
NSError *error = nil;
NSData *recervedData = [NSURLConnection sendSynchronousRequest:requestreturningResponse:&urlResponse error:&error];
NSString *results = [[NSString alloc] initWithBytes:[recervedData bytes] length:[recervedDatalength] encoding:NSUTF8StringEncoding];
NSDictionary *dic = [results JSONValue];
NSArray *infoArray = [dic objectForKey:@"results"];
if ([infoArray count]) {
NSDictionary *releaseInfo = [infoArray objectAtIndex:];
NSString *lastVersion = [releaseInfo objectForKey:@"version"];
if (![lastVersion isEqualToString:currentVersion]) {
//trackViewURL = [releaseInfo objectForKey:@"trackVireUrl"];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"更新" message:@"有新的版本更新，是否前往更新？" delegate:self cancelButtonTitle:@"关闭" otherButtonTitles:@"更新", nil];
alert.tag = 10000;
[alert show];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"更新" message:@"此版本为最新版本"delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
alert.tag = 10001;
[alert show];
}
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag==10000) {
if (buttonIndex==1) {
NSURL *url = [NSURL URLWithString:@"软件在appstore中的链接"];
[[UIApplication sharedApplication]openURL:url];
}
}