如何在目标C中为iPhone绘制UITableViewCell中的动态列数 [英] How to draw dynamic number of columns in uitableviewcell for iphone in objective c

问题描述

任何人都可以告诉我如何使用uitableviewcell的自定义类在uitableviewcell中创建动态列数.我有4或5或6列，并且它不是固定的.所以如何绘制列.

Can any anyone tell me how to create dynamic number of columns in uitableviewcell using custom class for uitableviewcell. i have 4 or 5 or 6 columns and it is not fixed.so how to draw the columns.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    NSString *MyIdentifier =[NSString stringWithFormat:@"Cell%i",indexPath.row];

    CustomCells *cell = (CustomCells*)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
    if (cell == nil) {

        cell = [[[CustomCells alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier] autorelease];
    }

    else{
        [[[cell contentView] subviews] makeObjectsPerformSelector: @selector(removeFromSuperview)];

    }
    for (int i = 0; i < noOfColumns; i++) {

        label= [[UITextView alloc] initWithFrame:CGRectMake(20+(i*columnWidth) , 0 ,(highestWidth + 20), tableView.rowHeight)]; 

        label.frame =CGRectMake(20+(i*columnWidth) , 0 ,(highestWidth + 20), tableView.rowHeight);
        label.text = [[searchedWords objectAtIndex:indexPath.row + (i*dividedWords)] texts];

        label.font = [UIFont fontWithName:@"Papyrus" size:(20.0)];
        label.textColor =[UIColor blackColor];
        label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight; 
        label.editable = NO;

        label.opaque =YES;

        [cell.contentView addSubview:label];

    }

}

return cell;
}

推荐答案

@darshan是正确的.在iPhone中，没有列的概念.您需要使用一些简单的图形方法来绘制矩形/线条.然后在该区域显示您的标签/文本视图. 因此，应看起来像列表行.

@darshan is right. In iPhone, there is no concept of columns. You need to use some simple graphics methods to draw rectangles/lines. And then show your label/textview in that rect. So, should look like table of columns & rows.

我已经实现了相同的功能，但是无法提供完整的代码. 只需创建自定义UITableViewCell(将其子类化)即可.并在其中编写以下方法

I had implemented the same, but cant give you the complete code. Just create custom UITableViewCell (subclass it). And write following methods in it

 - (void)addColumn:(CGFloat)position 
 {
if(columns == nil)
{
    columns = [[NSMutableArray alloc]init];
}
     [columns addObject:[NSNumber numberWithFloat:position]];
 }

- (void)drawRect:(CGRect)rect 
{

  CGContextRef ctx = UIGraphicsGetCurrentContext();
  // Use the same color and width as the default cell separator for now
  // CGContextSetRGBStrokeColor(ctx, 0.5, 0.5, 0.5, 1.0);
  CGContextSetRGBStrokeColor(ctx, 0, 0, 0, 1.0);
  CGContextSetLineWidth(ctx, 0.50);

  for (int i = 0; i < [columns count]; i++) {
    CGFloat f = [((NSNumber*) [columns objectAtIndex:i]) floatValue];
    CGContextMoveToPoint(ctx, f, 0);
    CGContextAddLineToPoint(ctx, f, self.bounds.size.height);
  }

  CGContextStrokePath(ctx);

  [super drawRect:rect];
}

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