NSString *version = @"";
NSURL *url = [NSURL URLWithString:@"http://itunes.apple.com/lookup?id=954270"];
versionRequest = [ASIFormDataRequest requestWithURL:url];
[versionRequest setRequestMethod:@"GET"];
[versionRequest setDelegate:self];
[versionRequest setTimeOutSeconds:150];
[versionRequest addRequestHeader:@"Content-Type" value:@"application/json"];
[versionRequest startSynchronous];
//Response string of our REST call
NSString* jsonResponseString = [versionRequest responseString];
NSDictionary *loginAuthenticationResponse = [jsonResponseString objectFromJSONString];
NSArray *configData = [loginAuthenticationResponse valueForKey:@"results"];
for (id config in configData)
{
version = [config valueForKey:@"version"];
}
//Check your version with the version in app store
if (![version isEqualToString:[itsUserDefaults objectForKey:@"version"]])
{
ProAlertView *createUserResponseAlert = [[ProAlertView alloc]
initWithTitle:@"New Version!!" message: @"A new version of app is
available to download" delegate:self cancelButtonTitle:@"Cancel"
otherButtonTitles: @"Download", nil];
[createUserResponseAlert show];
[createUserResponseAlert release];
}
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
// the user clicked one of the OK/Cancel buttons
if (buttonIndex == 1)
{
NSString *iTunesLink = @"itms-apps://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftwareUpdate?id=<appid>&mt=8";
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:iTunesLink]];
}
}
请求http://itunes.apple.com/lookup?id=954270返回的数据给出的version为2.3, 与本地客户端版本号比较，即可判断有无更新。
通过此方法，我们可以在IOS应用当中提示是否有更新，这样可以让用户安装更新更安全的应用。