第一种是直接从AppStore上获取APP的版本号，然后已安装的App版本号比较判断是否需要更新，另一种是从服务器上获取APP的版本号，然后与已安装的App版本号比较判断是否需要更新。
第一种方法检测更新方法的优点是：检测版本号是实时同步的；缺点是：苹果网络不稳定，检测更新有点延时，部分App获取不到任何参数。第二种检测更新方法的优点是：检测更新速度快、检测稳定；缺点是：和App Store上的应用版本号不同步（App上架需要审核时间，不确定什么时候成功更新到App Store上）。
那么，我先来说一下第一种方法吧，先从AppStore上获取版本号，代码如下：
//获取版本号
-(void)Postpath
{
NSString *appId = @"0123456789";//这是随便写的，你可以在查看APP信息里找到AppleId
NSString *urlStr = [[NSString alloc] initWithFormat:@"http://itunes.apple.com/lookup?id=%@",appId];
NSURL *url = [NSURL URLWithString: urlStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringCacheData
timeoutInterval:10];
[request setHTTPMethod:@"POST"];
NSOperationQueue *queue = [NSOperationQueue new];
[NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response,NSData *data,NSError *error){
NSMutableDictionary *receiveStatusDic=[[NSMutableDictionary alloc]init];
if (data) {
NSDictionary *receiveDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
if ([[receiveDic valueForKey:@"resultCount"] intValue]>0) {
[receiveStatusDic setValue:@"1" forKey:@"status"];
[receiveStatusDic setValue:[[[receiveDic valueForKey:@"results"] objectAtIndex:0] valueForKey:@"version"] forKey:@"version"];
}else{
[receiveStatusDic setValue:@"-1" forKey:@"status"];
}
}else{
[receiveStatusDic setValue:@"-1" forKey:@"status"];
}
[self performSelectorOnMainThread:@selector(receiveData:) withObject:receiveStatusDic waitUntilDone:NO];
}];
}
在这个方法里可以输出获取的版本号：
-(void)receiveData:(id)sender
{
NSLog(@"receiveData=%@",sender);
[self compareVersion:sender[@"version"]];
}
在这个方法里比较新旧版本号的大小：
- (BOOL)compareVersion:(NSString *)serverVersion{
//获取应用当前版本号
NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
NSString *appVersion = [infoDic objectForKey:@"CFBundleShortVersionString"];
/*
typedef NS_ENUM(NSInteger, NSComparisonResult)
{
NSOrderedAscending = -1L,//升序
NSOrderedSame, //等于
NSOrderedDescending //降序
};
*/
//比较当前版本和新版本号的大小
if ([appVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {
NSLog(@"发现新版本： %@",serverVersion);
return YES;
}else{
NSLog(@"没有新版本");
return NO;
}
}
第二种方法，是从服务器上获取版本号进行判断的，代码如下：
-(void)reloadData{
NSString *BaseUrl = @"";
NSDictionary *dic = [NSDictionary dictionary];
dic = @{@"FunName":@"Get_App_Version",@"Params":@{@"DATA":@"2"}};
HttpRequest *respont = [HttpRequest share];
[respont sendRequestWithUrlNSString:BaseUrl withDic:dic withCompletion:^(NSDictionary *responseData, id status, NSError *error) {
//判断版本
NSLog(@"%@",responseData);
if ([[responseData objectForKey:@"FAG"]isEqualToString:@"1"]) {
//获取当前应用版本号
NSDictionary *infoDict=[[NSBundle mainBundle] infoDictionary];
NSString *version=[infoDict objectForKey:@"CFBundleShortVersionString"];
// NSLog(@"%@",version);
NSDictionary *VersionDic = [responseData objectForKey:@"RET"];
//获取到服务器上最后的版本号
NSString *backVersion = [VersionDic objectForKey:@"IOS_VERSION"];
if(backVersion==nil)
{
return;
}
//VersionDic objectForKey:@"IOS_Index"]判断是否在审核期间，如果在审核期间为1，没在审核期间为0,后台给的
if([version isEqualToString:backVersion] == NO&&[[VersionDic objectForKey:@"IOS_Index"] isEqualToString:@"0"])
{
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"软件有新版本，是否下载" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
NSLog(@"取消更新");
}];
UIAlertAction *otherAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSString *updateUrl = [VersionDic objectForKey:@"IOS_URL"];//后台给的
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:updateUrl]];
}];
[alertController addAction:cancelAction];
[alertController addAction:otherAction];
[self presentViewController:alertController animated:YES completion:nil];
});
}else{
dispatch_async(dispatch_get_main_queue(), ^{
});
}
}
}];
}
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