NSDictionary *infoDict = [[NSBundle mainBundle]infoDictionary];
NSString *currentVersion = [infoDict objectForKey:@"CFBundleShortVersionString"];
NSString *resultString = [NSString stringWithFormat:@"有更新 V%@",currentVersion];
NSDictionary *tempDict = @{ NSForegroundColorAttributeName:[UIColor redColor]};
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc]initWithString:resultString];
[attrString addAttributes:tempDict range:NSMakeRange(0, 3)];
_versionLabel.attributedText = attrString;