//计算textview 高度

 - (float) heightForTextView: (UITextView *)textView WithText: (NSString *) strText{

 //    float fPadding = 16.0; // 8.0px x 2

 //    CGSize constraint = CGSizeMake(textView.contentSize.width - fPadding, CGFLOAT_MAX);

 //

 //    CGSize size = [strText sizeWithFont: textView.font constrainedToSize:constraint lineBreakMode:NSLineBreakByWordWrapping];

 //    float fHeight = size.height + 16.0;

     NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];

     paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;

     NSDictionary *attributes = @{NSFontAttributeName:textView.font, NSParagraphStyleAttributeName:paragraphStyle.copy};

     float fPadding = 16.0; // 8.0px x 2

     CGSize constraint = CGSizeMake(textView.contentSize.width - fPadding, CGFLOAT_MAX);

     CGSize size = [strText boundingRectWithSize:constraint options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size;

     float fHeight = size.height + 16.0;

     return fHeight;