Question

我有一个表格视图，其中我正在显示一些记录。导航到第二个视图，在第二个视图控制器中，我们有四个选项，如primary，secondary，tertia，quatrnary。当用户选择任何此选项时，它将导航回来，所选的单元格颜色将会改变。

所有选项都运作良好。但我坚持以下问题，

假设用户选择第一个单元格并将其设置为pri，它将向后导航并且颜色将为红色，但是当用户选择另一个单元格（supoose 5 cell）并再次设置为primary时，则单元格1将保持与红色相同。我不想要这个。用户一次只能将一条记录设置为pri / sec / ter / quaternary。

我将如何管理？尝试重新加载表数据，但没有工作？导航回来我在视图中使用下面的代码出现

if (singltong.primary == indes) {

    [tbleMasjidnames cellForRowAtIndexPath:tableSelection].backgroundColor = [UIColor colorWithRed:13.0f/255.0f  green:159.0f/255.0f blue:78.0f/255.0f alpha:1.0f];

}
else if (singltong.secondary == indes){
    [tbleMasjidnames cellForRowAtIndexPath:tableSelection].backgroundColor = [UIColor colorWithRed:255.0f/255.0f green:33.0f/255.0f blue:59.0f/255.f alpha:1.0f];
}
else if (singltong.tertiary == indes){
    [tbleMasjidnames cellForRowAtIndexPath:tableSelection].backgroundColor = [UIColor colorWithRed:23.0f/255.0f green:153.0f/255.0f blue:221.0f/255.0f alpha:1.0f];
  }
else if (singltong.quaternary == indes){
    [tbleMasjidnames cellForRowAtIndexPath:tableSelection].backgroundColor = [UIColor colorWithRed:255.0f/255.0f green:150.0/255.0 blue:23.0f/255.0f alpha:1.0f];
}

 //********************Cell for row****************
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"MasjidCell"; // Custom cell for masjid Name
MasjidListCell *cell = (MasjidListCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.backgroundColor = [UIColor greenColor];
if (cell == nil){
    NSArray *nib=[[NSBundle mainBundle] loadNibNamed:@"MasjidCell" owner:self options:nil];
    cell = nib[0];
}
cell.selectionStyle=UITableViewCellSelectionStyleNone;

//if search is on then get data from search result array else from shared instance
if (_isSearchOn) {
    if ([searchResults count]==0) {
        cell.lblMasjidName.text=@"No Record Found.";
    }
    else{
        cell.lblMasjidName.text = [searchResults objectAtIndex:indexPath.row];
    }
}
else{
    cell.lblMasjidName.text = singltong.MasjidNames[indexPath.row];
    cell.lblLocalArea.text  = singltong.masjidLocalArea[indexPath.row];
    cell.lblCountry.text    = singltong.masjidCountry[indexPath.row];
}
return cell;

} //方法结束

Answer 1

如果单元格绑定到数据库中的实体，则必须在优先级选择控制器中运行逻辑，在选择之后，具有此优先级的其他对象设置回或表现得像你想要的。如果您使用NSFetchedResultsController，您的数据将保留为数据，您可以使用cellForRowAtIndexpath方法进行默认处理

if ([entity.prio intValue] == 1) { // set your cell settings }

所有受影响的单元格都必须更新，因此[tableView reloadData];中的viewWillAppear可能会有所帮助

更新

- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [tbleMasjidnames reloadData]; // ... } - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // ... get/create cell instance if (_isSearchOn) { if ([searchResults count]==0) { cell.lblMasjidName.text=@"No Record Found."; } else { cell.lblMasjidName.text = [searchResults objectAtIndex:indexPath.row]; } } else { cell.lblMasjidName.text = singltong.MasjidNames[indexPath.row]; cell.lblLocalArea.text = singltong.masjidLocalArea[indexPath.row]; cell.lblCountry.text = singltong.masjidCountry[indexPath.row]; switch(indexPath.row) { case singltong.primary: cell.backgroundColor = [UIColor colorWithRed:13.0f/255.0f green:159.0f/255.0f blue:78.0f/255.0f alpha:1.0f]; break; case singltong.secondary: cell.backgroundColor = [[UIColor colorWithRed:255.0f/255.0f green:33.0f/255.0f blue:59.0f/255.f alpha:1.0f]; break; // ... default: cell.backgroundColor = [UIColor whiteColor]; // or other default break; } } }

但您仍需在singltong课程中实施正确的处理逻辑才能使其正常工作。

如何在每次导航时管理单元格颜色样式

1 个答案: