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NSString * key = (__bridge NSString *) kCFBundleVersionKey;
/// 当前软件的版本号
NSString * currentVersion = [NSBundle mainBundle].infoDictionary[key];
//、 沙河中的版本号
NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];
NSString * sandBoxVersion = [defaults stringForKey:key];
/// 比较版本号
if ([currentVersion compare:sandBoxVersion] == NSOrderedDescending) {
/// 存储当前软件版本号
[defaults setObject:currentVersion forKey:key];
[defaults synchronize];
self.window.rootViewController = [[LLNewfeatureViewController alloc]init];
}else
{
self.window.rootViewController = [[LLTabbarViewController alloc]init];
}
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原文地址:http://www.cnblogs.com/angongIT/p/4270323.html