-(void)calculateHeight:(NSArray *)arr

{

    if (!heightArray) {

        heightArray = [[NSMutableArray alloc] init];

    }

    for (TagItemInfo *info in arr) {

        NSString *contentStr = info.content;

        CGSize contentSize = [contentStr sizeWithFont:[UIFontboldSystemFontOfSize:14.0] constrainedToSize:CGSizeMake(280, MAXFLOAT)];

        [heightArray addObject:[NSString stringWithFormat:@"%.0f",contentSize.height]];

    }

}