Question

我通过拖放在IB中的tableviewcontroller上添加了一个UIView，然后我已将IBoutlet分配给UIView。

问题是我有一个动态改变其大小的uilabel，所以如果uilabel很短，我想让tableview更接近，否则tableview不应该那么近，所以我可以显示一个很长的标签。

因此，我尝试更改位于uiview之上的tableview的框架uiview更改其框架大小，但tableview在那里保持稳定。

当我uitableview帧尺寸更大时，我想让UIview失效

if ([[self agenda] getMeetingTime] != nil) {
        descriptionLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, dateLabel.frame.origin.y + dateLabel.bounds.size.height+15, self.view.frame.size.width-75, 150)];
        descriptionLabel.textColor =[UIColor colorWithRed:96/256.0 green:96/256.0 blue:96/256.0 alpha:1.0];
        descriptionLabel.font = [UIFont fontWithName:@"GillSans" size:15.0f];
        descriptionLabel.text =[[self agenda] getMeetingTime];
        descriptionLabel.backgroundColor = [UIColor clearColor];
        descriptionLabel.numberOfLines=0;
        descriptionLabel.tag=PopulateTag;

        //Calculate the expected size based on the font and linebreak mode of your label
        CGSize maximumLabelSize = CGSizeMake(709,999);

        CGSize expectedLabelSize = [descriptionLabel.text sizeWithFont:descriptionLabel.font
                                              constrainedToSize:maximumLabelSize
                                                  lineBreakMode:descriptionLabel.lineBreakMode];

        //adjust the label the the new height.
        CGRect newFrame = descriptionLabel.frame;
        newFrame.size.height = expectedLabelSize.height;
        descriptionLabel.frame=newFrame;


        if ( expectedLabelSize.height>70) {

            self.upperView.frame = CGRectMake(0, 0, self.upperView.frame.size.width, self.upperView.frame.size.height+expectedLabelSize.height+20);

        }
        else
        {
            self.upperView.frame = CGRectMake(0, 0, self.upperView.frame.size.width, self.upperView.frame.size.height+expectedLabelSize.height);
        }


        [ self.upperView addSubview: descriptionLabel];


    }


    //black line
    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(10, descriptionLabel.frame.origin.y + descriptionLabel.bounds.size.height+15, descriptionLabel.frame.size.width+50, 1)];
    line.backgroundColor=[UIColor colorWithRed:164/256.0 green:165/256.0 blue:160/256.0 alpha:1.0];
    line.tag=PopulateTag;

    [self.upperView addSubview:line];

      //this does not work pushes whole view down
     //self.restOfView.frame=CGRectMake(10, line.frame.origin.y + line.bounds.size.height+1, self.upperView.frame.size.width, 600);
    [restOfView reloadData];

在IB上：

enter image description here