无法在UITableViewCell上设置自定义BackgroundColor

Question

我正在使用此代码来自定义单元格背景视图的颜色：

UIColor *cellBackgroundColor = [UIColor colorWithRed:255.0 green:255.0 blue:255.0 alpha:1.0];
cell.contentView.backgroundColor = cellBackgroundColor;

事情是，它不起作用。但是这段代码非常合适：

cell.contentView.backgroundColor = [UIColor redColor];

这里有什么问题？我不能根据自己的喜好自定义单元格的颜色吗？或者我做错了什么？

Answer 1

只需改变：

UIColor *cellBackgroundColor = [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0];
cell.contentView.backgroundColor = cellBackgroundColor;

Answer 2

您必须使用此委托设置单元格背景： -

- (void)tableView: (UITableView*)tableView
  willDisplayCell: (UITableViewCell*)cell
forRowAtIndexPath: (NSIndexPath*)indexPath
{

   // UIImage *img = [UIImage imageNamed:@"button.png"];  // get your background image

    UIColor *cellBackgroundColor = [UIColor colorWithRed:255/255.0 green:108/255.0 blue:61/255.0 alpha:1.0]; //if you want to set color then use this line

  //  UIColor *backgroundColor = [[UIColor alloc] initWithPatternImage: img];
    cell.backgroundColor = cellBackgroundColor;
    cell.textLabel.backgroundColor = [UIColor clearColor];
    cell.detailTextLabel.backgroundColor = [UIColor clearColor];
}

你的表格如下： -

Taking an RGB color and normalizing it with UIColor on the iPhone

Your values are between 0 and 255. Use them to create a UIColor:

    float r; float g; float b; float a;

    [UIColor colorWithRed:r/255.f
                    green:g/255.f
                     blue:b/255.f    
                    alpha:a/255.f];

Answer 3

cell.backgroundView.backgroundColor

您可以制作自定义视图，并可以更改完整的背景视图

UIView *backgroundViewForCell = [[[UIView alloc] init] autorelease];
backgroundViewForCell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"row-bg.png"]];
UIView *selectedBackgroundViewForCell = [[[UIView alloc] init] autorelease];
selectedBackgroundViewForCell.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:.2];
cell.backgroundView = backgroundViewForCell;
cell.selectedBackgroundView = selectedBackgroundViewForCell;

Answer 4

也许您可以在设置颜色之前添加cell.contentView.backgroundColor = [UIColor clearColor]。

原因是backgroundview位于底部。内容视图位于顶部。

其他LOgic IS

UIView *myBackView = [[UIView alloc] initWithFrame:cell.frame];

myBackView.backgroundColor = [UIColor colorWithRed:1 green:1 blue:0.75 alpha:1];

[cell.contentView addSubview:myBackView];

[myBackView release];

Answer 5

你走在正确的轨道上。您只需要用此

替换您的颜色代码

UIColor *cellBackgroundColor = [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0];

享受编程!!