在 iOS 中单击按钮时的标签和框架扩展

Posted 2023-03-12

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【中文标题】在 iOS 中单击按钮时的标签和框架扩展【英文标题】：Label and frame expansion on button click in iOS 【发布时间】：2013-08-24 04:38:10 【问题描述】：

我需要通过单击表格视图部分中的按钮来展开框架和标签。同样，当再次单击按钮时，框架和标签应恢复到其原始（压缩）状态。这必须对表格视图的所有部分进行。如果我单击一个部分的按钮，它会扩展所有部分的框架。但是该标签已针对该单击部分上的所有内容展开。下面是代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
                   
    NSUInteger section = [indexPath section];

    if(section==0 || section==2)
                       
        static NSString *myIdentifier = @"tableCell";

        DUGSProjectTableCell *cell = (DUGSProjectTableCell*)[tableView dequeueReusableCellWithIdentifier:myIdentifier];
        cell.readMoreButton.tag=[indexPath section];

        [cell.readMoreButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

        if (section==0) 

            cell.myLabel.text=@"On this festive season one of the leading real estate developers in NCR Delhi, is launching a new residential project ";
        

        else if (section==2)
            cell.myLabel.text=@"Situated in hot & fast upcoming neighbourhood,Spread in 30 acres,Located in the heart of the city";
        

        if(self.isHeightChanged)
                               
            if ([cell.readMoreButton.titleLabel.text isEqualToString:@"Read More"]) 

                [cell.readMoreButton setTitle:@"Read Less" forState:UIControlStateNormal];

                cell.readMoreButton.frame=CGRectMake(223, 90 , 66, 25) ;

                CGRect frame = cell.myLabel.frame;

                cell.myLabel.numberOfLines=0;
                cell.myLabel.lineBreakMode=NSLineBreakByWordWrapping;
                frame.size.height=100;
                cell.myLabel.frame=frame;

            

            else if ([cell.readMoreButton.titleLabel.text isEqualToString:@"Read Less"])
            
                [cell.readMoreButton setTitle:@"Read More" forState:UIControlStateNormal];

                cell.readMoreButton.frame=CGRectMake(223, 70 , 66, 25) ;

                CGRect frame = cell.myLabel.frame;

                cell.myLabel.numberOfLines=0;
                cell.myLabel.lineBreakMode=NSLineBreakByWordWrapping;

                frame.size.height=30;
                cell.myLabel.frame=frame;

            
        
        return  cell;
    

    else if (section==1)

        static NSString *myIdentifier = @"unitCell";

        DUGSUnitPlanCell *cell = (DUGSUnitPlanCell*)[tableView dequeueReusableCellWithIdentifier:myIdentifier];

        return cell;

    

    return NULL;

下面是按钮点击的代码：

 (void)buttonPressed:(UIButton *)button

    DUGSProjectTableCell *selectedCell = (DUGSProjectTableCell*)[[button superview] superview];
    if (selectedCell) 



        if ([button.titleLabel.text isEqualToString:@"Read More"] ) 
            whichButton=@"M";
            NSLog(@"%@",whichButton);
        

        else if ([button.titleLabel.text isEqualToString:@"Read Less"])
           whichButton=@"L";
            NSLog(@"%@",whichButton);

        
        NSLog(@"%d",selectedCell.readMoreButton.tag);

        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:selectedCell.readMoreButton.tag];
        selectedIndexPath=indexPath;
        NSLog(@"%@",selectedIndexPath);
        self.isHeightChanged=YES;
        [self.tableViewForPropertyOverview reloadRowsAtIndexPaths:@[selectedIndexPath ] withRowAnimation:UITableViewRowAnimationAutomatic];

下面是展开框架的代码：

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

    if([indexPath section]==1)
        return 60;
    

    if (([indexPath section]==0)||([indexPath section]==2)) 

        if (selectedIndexPath!=NULL)
            return 120.0f;

        

        else
            return 60.0f;

所有部分的帧大小增加到 120。相反，当单击其中的按钮时，它应该对第 0 和 2 部分执行此操作。请指教。

【问题讨论】：

【参考方案1】：

我认为您确实没有 3 个部分，而是一个包含 3 个表格视图单元格的部分。

似乎对节和行存在一些误解。你写：