Question

显示一个表视图并选择一行后我想将所有未选中行的颜色表文本标签颜色更改为蓝色..在case语句中当前我可以更改当前行选中的文本标签但是在那种情况下我不知道如何访问其他行文本标签。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{ 
    switch (indexPath.row) {
        case 0:
          UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
          cell.textLabel.textColor = [UIColor yellowColor];
          //******* NEED TO CHANGE ALL OTHER ROWS TEXT LABEL TO BLUE
          break;
        case 1:
          UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
          cell.textLabel.textColor = [UIColor yellowColor];
          //******* NEED TO CHANGE ALL OTHER ROWS TEXT LABEL TO BLUE 
          break;
        default:
          break;
    }
}

Answer 1

从表视图的委托中管理单元格选择状态将不必要地困难。您可以存储所选单元格的索引路径，调用表格视图的cellForRowAtIndexPath:方法以获取以前选择的单元格，并重置标签的颜色。但是，您不知道以前选择的单元格是否仍然可见或已加载。

最好使用实现setSelected:的UITableViewCell子类来更新自己的视图。这样，您的表视图委托只需要设置单元格的选定属性，单元格负责相应地更新自己的视图。这也将允许您实现perpareForReuse来重置单元格的视图，这样您就不必担心重用以前选择的单元格并意外地在选定状态下显示单元格。

Answer 2

保留变量，例如名为NSInteger的{{1}}，用于跟踪所选单元格。将其更改为选定的单元格，然后重新加载可见单元格。在selectedCell中，您检查变量并相应地设置标签样式。

tableView:cellForRowAtIndexPath:

因此，在- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { selectedCell = indexPath.row; [tableView reloadData]; }

tableView:cellForRowAtIndexPath:

干杯，
的Sascha

Answer 3

- (void)tableView:(UITableView *)tableView 
     didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

  [self setSelectedImageAndTextColorForTableCell:indexPath :tableView];
}

//THIS METHOD IS USED TO RESET THE SELECTED COLORS FOR UIIMAGEVIEW AND UILABEL------
- (void)setSelectedImageAndTextColorForTableCell:(NSIndexPath *)aIndexPath 
               :(UITableView *)aTableView {
    if (!self.LastIndexPath_) {
        if (aTableView == mTableView_) {
            [self setLastIndexPath_:aIndexPath];
        }
    }
    if (self.mLastIndexPath_.row != aIndexPath.row) {
        //If Old Cell.

      UITableViewCell *lOldCell = [aTableView cellForRowAtIndexPath:self.mLastIndexPath_];
      UILabel *lLabel_=(UILabel*)[lOldCell.contentView viewWithTag:1];
      [lLabel_ setTextColor:RGB_A(35, 30, 32, 1)];

      //If User touches on new cell.

      UITableViewCell *lNewCell = [aTableView cellForRowAtIndexPath:aIndexPath];
      UILabel *lLabel_ = (UILabel*)[lNewCell.contentView viewWithTag:1];
      [lLabel_ setTextColor:[UIColor whiteColor]];
      self.mLastIndexPath_ = aIndexPath;


    }else {
        UITableViewCell *lNewCell = [aTableView cellForRowAtIndexPath:aIndexPath];
        if (aTableView == mTableView_) {
            UITableViewCell *lNewCell = [aTableView cellForRowAtIndexPath:aIndexPath];
            UILabel *lLabel_ = (UILabel*)[lNewCell.contentView viewWithTag:1];
            [lLabel_ setTextColor:[UIColor whiteColor]];
            self.mLastIndexPath_ = aIndexPath;
        }
    }
}

希望这会对你有所帮助快乐的编码

Answer 4

`- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = (UITableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"CellIdentifier"];
    if (nil==cell)
    {
        cell = [[[UITableViewCell alloc]  initWithFrame:CGRectMake(0,0,0,0)] autorelease];
        cell.contentView.backgroundColor=CLEAR_COLOR;
        //Configure cell format for the tableView,
        //Same format for all the three sections.
        int tagCount = 1;
        CGFloat lXCoord = 5,lYCoord = 7,lWidth = 100/*,lHeight = 18*/;
//      for (tagCount = 1; tagCount <= 1; tagCount++) {
            UILabel *lUILabel = [[UILabel alloc]init];
                lUILabel.frame = CGRectMake(lXCoord+10, 0, lWidth, 34);
            lUILabel.backgroundColor = [UIColor clearColor];
            lUILabel.textColor = RGB_A(35, 30, 32, 1);
           lUILabel.highlightedTextColor=WHITE_COLOR;
            lUILabel.font = FONT_OPENSANS_REGULAR(14);
            [cell.contentView addSubview:lUILabel];
            [lUILabel setTag:tagCount];
            RELEASE_NIL(lUILabel);
//      }
        UIImageView *lUIImageView = [[UIImageView alloc]init];
            lUIImageView.frame = CGRectMake(lXCoord+100, lYCoord, 45, 29);
       [lImageView_ setHighlightedImage:[UIImage imageNamed:[NSString stringWithFormat:@"iPad_BuildInspectionDetails_%@_Selected.png",[[mDamageTableArray_ objectAtIndex:0] objectAtIndex:indexPath.row]]]];
      [lImageView_ setImage:[UIImage imageNamed:[NSString stringWithFormat:@"iPad_BuildInspectionDetails_%@_Normal.png",[[mDamageTableArray_ objectAtIndex:0] objectAtIndex:indexPath.row]]]];
        cell.accessoryView=lUIImageView;
        [lUIImageView setTag:tagCount + 1];
        RELEASE_NIL(lUIImageView);
        UIView *lSelectedView_ = [[[UIView alloc] init] autorelease];
        lSelectedView_.backgroundColor =SELECTED_CELL_COLOR_GM;
        cell.selectedBackgroundView = lSelectedView_;
    }
    //cell.accessoryType=UITableViewCellAccessoryNone;
    return cell;
}
 - Note :-
 Use setHighlightedImage property for UIImageView `enter code here`& highlightedTextColor for UILabel.
 you can see highlighted image and highlighted text color if you select a row in UITableView
This will help you.
Happy Coding...`

在表视图中选择一行后，如何访问未选中的行文本标签以使其颜色变为chage

4 个答案: