Question

我有一个自定义的UITableView Cell，我选择了一个特定的单元格并转到另一个ViewController，当我回到第一个视图控制器时，单元格的选定状态不可见。在从另一个viewControllers导航后，我将如何改变单元格的选定状态？

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
   return [timeSet count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   timeSettingCell *newCell = nil;
   newCell = [tableView dequeueReusableCellWithIdentifier:identifier];
   if(newCell == nil)
   {
    NSLog(@"newCell ===================");
    NSArray *nibViews = [[NSBundle mainBundle] loadNibNamed:@"timeSettingCell"   owner:self options:nil];
    newCell  = [ nibViews lastObject];
    }
    newCell.timeLabel.text=[timeSet objectAtIndex:indexPath.row];

    if (newCell.selected==YES) {
      newCell.highlighted=YES;
      newCell.timeImage.image=[UIImage imageNamed:@"radioSelected.png"];
    }
    else {
      newCell.highlighted=NO;
      newCell.timeImage.image=[UIImage imageNamed:@"radioNotSelected.png"];
    }
return newCell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
value=[[time1 objectAtIndex:indexPath.row]integerValue];

SettingsViewController *settings=[[SettingsViewController alloc]initWithNibName:nil bundle:nil andCounterValue:value];
[[self presentingViewController] dismissModalViewControllerAnimated:YES];
index=indexPath.row;
[settings release];
}
-(void)viewWillAppear:(BOOL)animated{
}

谢谢

Answer 1

这样，它会正常工作......

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

[tableView deselectRowAtIndexPath:indexPath animated:YES];

Answer 2

我认为您应该使用创建为单例，ivar或NSUserDefault的NSArray记住您的单元格状态（选择与否），然后在cellForRowAtIndexPath中读取其状态。

编辑：示例代码

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Do what you want

// This save the index of your selected cell on disk
[[NSUserDefaults standardUserDefaults] setInteger:indexPath.row forKey:@"selectedCell"];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Create your cell

// Here you check if the cell should be selected or not
if (indexPath.row == [[NSUserDefaults standardUserDefaults] integerForKey:@"selectedCell"]) {
    newCell.highlighted=YES;
    newCell.timeImage.image=[UIImage imageNamed:@"radioSelected.png"];
} else {
    newCell.highlighted=NO;
    newCell.timeImage.image=[UIImage imageNamed:@"radioNotSelected.png"];
}

return aCell;
}

NSUserDefaults可用于在您的设备上保存数据并在以后检索它们。这意味着即使关闭并重新打开您的应用后，您也可以检查您的手机状态。

要使用NSUserDefaults，您需要为项目添加一个Settings.bundle。看看NSUserDefaults Class Reference

表视图单元格选择状态更改何时转到另一个viewcontroller？

2 个答案: