根据label的文字判断高度

    NSString *aboutStr = [NSStringstringWithFormat:@"简介：%@", provicerInfo.Summary];

    self.aboutLabel.text = aboutStr;

    CGRect rect = [aboutStrboundingRectWithSize:CGSizeMake(self.aboutLabel.bounds.size.width,CGFLOAT_MAX)options:NSStringDrawingUsesLineFragmentOriginattributes:@{NSFontAttributeName:self.aboutLabel.font}context:nil];

只需要获取长度的话用

    CGSize rect=[testModel.name sizeWithAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:17]}];