当用户向下和向上滚动表格时，我遇到了 UITableViewCell 设置问题。-didSelectRowAtIndexPath一旦分组表滚动到另一个单元格并返回到该单元格，该单元格就会丢失更改（设置在 中的红色/绿色背景图像）。
我使用下面的代码在两个部分中显示一个问题和 4 个答案选项。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *kCustomCellID = [NSString stringWithFormat:@"CustomCellID%d", ((100 * indexPath.section) + indexPath.row)];
UITableViewCell *cell = nil;//[tableView dequeueReusableCellWithIdentifier:kCustomCellID];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kCustomCellID] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
if (indexPath.section == 0) {
cell.textLabel.text = questionText;
cell.textLabel.textAlignment = UITextAlignmentCenter;
cell.textLabel.font = FONT_QUESTIONTEXT;
cell.textLabel.numberOfLines = 0;
}
else {
cell.textLabel.text = [self.answerChoices objectAtIndex:indexPath.row];
cell.textLabel.font = FONT_ANSWERTEXT;
cell.textLabel.numberOfLines = 0;
ConfigurationBase *configBase = [[ConfigurationBase alloc] initWithConfigurationType:kConfigTypeQuiz];
NSString *backgroundImageName = [configBase.configInfo valueForKey:CKEY_IMG_ANSWER_BACKGROUND];
NSString *leftImage = [configBase.configInfo valueForKey:[choicesLeftImages objectAtIndex:indexPath.row]];
[configBase release];
cell.backgroundColor = [UIColor clearColor];
UIImageView *bgView = [[UIImageView alloc] initWithFrame:cell.frame];
bgView.image = [UIImage imageNamed:backgroundImageName];
cell.backgroundView = bgView;
[bgView release];
cell.imageView.image = [UIImage imageNamed:leftImage];
}
return cell;
}
而且，当用户选择其中一个选项时，我将背景颜色更改为绿色和红色的正确和错误选择。更改 2 行背景的代码如下..
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.section == 1) { // Answer choice section.
NSString *correctAnswerStr = [quizSession fetchCorrectAnswer];
NSInteger correctAnswerIndex = -1;
ConfigurationBase *configBase = [[ConfigurationBase alloc] initWithConfigurationType:kConfigTypeQuiz];
NSString *correctAnsImageName = [configBase.configInfo valueForKey:CKEY_IMG_ANSWER_CORRECT_BACKGROUND];
NSString *wrongAnsImageName = [configBase.configInfo valueForKey:CKEY_IMG_ANSWER_WRONG_BACKGROUND];
[configBase release];
UITableViewCell *answerCell = [tableView cellForRowAtIndexPath:indexPath];
answerCell.backgroundColor = [UIColor clearColor];
UIImageView *bgView = [[UIImageView alloc] initWithFrame:answerCell.frame];
bgView.image = [UIImage imageNamed:wrongAnsImageName];
answerCell.backgroundView = bgView;
[bgView release];
for (NSString *answerChoice in answerChoices) {
++correctAnswerIndex;
if ([answerChoice isEqualToString:correctAnswerStr]) {
// Correct Index obtained, so set the background color for it.
NSIndexPath *correctIndexPath = [NSIndexPath indexPathForRow:correctAnswerIndex
inSection:indexPath.section];
UITableViewCell *correctAnswerCell = [tableView cellForRowAtIndexPath:correctIndexPath];
correctAnswerCell.backgroundColor = [UIColor clearColor];
UIImageView *bgView = [[UIImageView alloc] initWithFrame:correctAnswerCell.frame];
bgView.image = [UIImage imageNamed:correctAnsImageName];
correctAnswerCell.backgroundView = bgView;
[bgView release];
break;
}
}
// Enable the 'next' button, allowing user to go for next question.
self.navigationItem.rightBarButtonItem.enabled = YES;
// Disable selection of answer until user go to next question.
tableView.allowsSelection = NO;
}
谁可以帮我这个事？TIA。
问候。