+ (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];
BOOL result = NO;
if ([lookup[@"resultCount"] integerValue] == 1){
NSString* appStoreVersion = lookup[@"results"][0][@"version"];
NSString* currentVersion = infoDictionary[@"CFBundleShortVersionString"];
NSArray *versionArray = [currentVersion componentsSeparatedByString:@"."];
NSArray *appStoreArray = [appStoreVersion componentsSeparatedByString:@"."];
for (int i=0; i<appStoreArray.count; i++) {
int bundleStat = [versionArray[i] intValue];
int serverStat = [appStoreArray[i] intValue];
if (bundleStat == serverStat) {
result = NO;
continue;
} else if (bundleStat > serverStat) {
result = NO;
break;
} else {
result = YES;
break;
}
}
}
return result;
}
출처: http://you9010.tistory.com/137 [uujing의 블로그]
