版本更新

#define PATH_OF_DOCUMENT    [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]

-(void)checkVersion

{

    //BOOL retValue=false;

    NSFileManager * fileManager = [NSFileManager defaultManager];

    NSString * versionPath = [PATH_OF_DOCUMENT stringByAppendingPathComponent:@"version.text"];

    if ([fileManager fileExistsAtPath:versionPath]) {

        NSString *lastVersion=@"1.0.0";

        NSData *reader = [NSData dataWithContentsOfFile:versionPath];

        lastVersion = [[NSString alloc]initWithData:[reader subdataWithRange:NSMakeRange(0, [lastVersion length])] encoding:NSUTF8StringEncoding];

        NSString *currentVersion=[[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];

        if (![lastVersion isEqualToString:currentVersion]) {

            [UIApplication sharedApplication].applicationIconBadgeNumber = 0;

            [fileManager removeItemAtPath:[PATH_OF_DOCUMENT stringByAppendingPathComponent:@"CHAMP.sqlite"] error:nil];

            if ([fileManager removeItemAtPath:versionPath error:nil]) {

                NSMutableData *writer = [[NSMutableData alloc]init];

                //将字符串添加到缓冲中

                [writer appendData:[currentVersion dataUsingEncoding:NSUTF8StringEncoding]];

                [writer writeToFile:versionPath atomically:YES];

                [writer release];

            }

        }

        [lastVersion release];

    }else{

        [UIApplication sharedApplication].applicationIconBadgeNumber = 0;

        [fileManager removeItemAtPath:[PATH_OF_DOCUMENT stringByAppendingPathComponent:@"CHAMP.sqlite"] error:nil];

        NSString *currentVersion=[[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];

        NSMutableData *writer = [[NSMutableData alloc]init];

        //将字符串添加到缓冲中

        [writer appendData:[currentVersion dataUsingEncoding:NSUTF8StringEncoding]];

        [writer writeToFile:versionPath atomically:YES];

        [writer release];

    }

    //return retValue;

}