选择时如何更改UITableViewCell的颜色？

Question

我有这样的菜单:

每个单元格的正常(未选定)状态是图像,所选状态也是图像(看起来像默认的蓝色图像).但是,我想添加一个额外的第三个图像,这样当用户选择一个单元格时,它会在变为蓝色(选中)之前短暂更改为第三个颜色.

这是我的代码:

(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView setBackgroundColor:[UIColor clearColor]];

    NSString *cellIdentifier = @"MenuItemCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle  reuseIdentifier:cellIdentifier];
    }

    UIImage *cellBackgroundNormal = [UIImage imageNamed:@"cell_menu_normal"];
    UIImage *cellBackgroundSelected = [UIImage imageNamed:@"cell_menu_selected"];
    UIImageView *cellBackgroundView = [[UIImageView alloc] initWithImage:cellBackgroundNormal];
    UIImageView *cellBackgroundSelectedView = [[UIImageView alloc] initWithImage:cellBackgroundSelected];
    cell.backgroundView = cellBackgroundView;
    cell.selectedBackgroundView = cellBackgroundSelectedView;

    [cell.textLabel setBackgroundColor:[UIColor clearColor]];
    [cell.textLabel setTextColor:[UIColor whiteColor]];
    [cell.textLabel setFont:[UIFont boldSystemFontOfSize:17.0]];
    cell.textLabel.text = [self.menuItems objectAtIndex:indexPath.row];

    return cell;
} 

如你所见,我现在只有两个州.我不知道如何cell.hoveredBackgroundView为第三张图片介绍某种形式.如果有人能帮我实现这一点,我真的很感激.

Answer 1

iOS 6.0及更高版本

- (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}

- (void)tableView:(UITableView *)tableView didHighlightRowAtIndexPath:(NSIndexPath *)indexPath {
  // Add your Colour.
    CustomCell *cell = (CustomCell *)[tableView cellForRowAtIndexPath:indexPath];
    [self setCellColor:[UIColor whiteColor] ForCell:cell];  //highlight colour
}

- (void)tableView:(UITableView *)tableView didUnhighlightRowAtIndexPath:(NSIndexPath *)indexPath {
  // Reset Colour.
    CustomCell *cell = (CustomCell *)[tableView cellForRowAtIndexPath:indexPath];
    [self setCellColor:[UIColor colorWithWhite:0.961 alpha:1.000] ForCell:cell]; //normal color

}

- (void)setCellColor:(UIColor *)color ForCell:(UITableViewCell *)cell {
    cell.contentView.backgroundColor = color;
    cell.backgroundColor = color;
}

自定义UITableViewCell

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    UIView * selectedBackgroundView = [[UIView alloc] init];
    [selectedBackgroundView setBackgroundColor:[UIColor colorFromHexString:@"5E6073"]]; // set color here
    [self setSelectedBackgroundView:selectedBackgroundView];
}

Answer 2

iOS 8.0(及更高版本)使用Swift

斯威夫特2

override func tableView(tableView: UITableView, shouldHighlightRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

override func tableView(tableView: UITableView, didHighlightRowAtIndexPath indexPath: NSIndexPath) {
    var cell = tableView.cellForRowAtIndexPath(indexPath)
    cell?.contentView.backgroundColor = UIColor.orangeColor()
    cell?.backgroundColor = UIColor.orangeColor()
}

override func tableView(tableView: UITableView, didUnhighlightRowAtIndexPath indexPath: NSIndexPath) {
    var cell = tableView.cellForRowAtIndexPath(indexPath)
    cell?.contentView.backgroundColor = UIColor.blackColor()
    cell?.backgroundColor = UIColor.blackColor()
}

斯威夫特3

override func tableView(_ tableView: UITableView, shouldHighlightRowAt indexPath: IndexPath) -> Bool {
    return true
}

override func tableView(_ tableView: UITableView, didHighlightRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    cell?.contentView.backgroundColor = UIColor.orange
    cell?.backgroundColor = UIColor.orange
}

override func tableView(_ tableView: UITableView, didUnhighlightRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    cell?.contentView.backgroundColor = UIColor.black
    cell?.backgroundColor = UIColor.black
}

Answer 3

你也可以像这样使用UIAppearance:

UIView *selectionView = [UIView new];
selectionView.backgroundColor = [UIColor redColor];
[[UITableViewCell appearance] setSelectedBackgroundView:selectionView];

这将适用于UITableViewCell的所有实例或您可能具有的任何子类.只需确保selectionStyle单元格的属性未 设置为UITableViewCellSelectionStyleNone.

Answer 4

比接受的答案更容易:

在您的UITableViewCell子类中:

在awakeFromNib或init:

self.selectionStyle = UITableViewCellSelectionStyleNone;

然后:

- (void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated
{
    [super setHighlighted:highlighted animated:animated];

    if (highlighted) {
        self.backgroundColor = [UIColor yourHighlightColor];
    }
    else {
        self.backgroundColor = [UIColor yourNormalColor];
    }
}

Answer 5

在定制单元格中尝试此操作

- (void)awakeFromNib
{
    UIView *selectedBackgroundView = [[UIView alloc] initWithFrame:self.bounds];
    selectedBackgroundView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    selectedBackgroundView.backgroundColor = [UIColor colorWithRed:246.0/255.0 green:95.0/255.0 blue:22.0/255.0 alpha:1.0];
    self.selectedBackgroundView = selectedBackgroundView;
}

Answer 6

迅速:

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    tableView.deselectRowAtIndexPath(indexPath, animated: true)
}

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    let selectionColor = UIView() as UIView
    selectionColor.layer.borderWidth = 1
    selectionColor.layer.borderColor = UIColor.blueColor().CGColor
    selectionColor.backgroundColor = UIColor.blueColor()
    cell.selectedBackgroundView = selectionColor
}

斯威夫特4:

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
    tableView.deselectRow(at: indexPath, animated: true)
}

override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath)
{
    let selectionColor = UIView() as UIView
    selectionColor.layer.borderWidth = 1
    selectionColor.layer.borderColor = UIColor.blue.cgColor
    selectionColor.backgroundColor = UIColor.blue
    cell.selectedBackgroundView = selectionColor
}