UITableViewCell 中的单选控制

UITableViewCell 中的单选控制 UITableViewCellAccessoryCheckmark

需要注意的是这个函数，用来设置cell的UITableViewCellAccessoryType 属性－－这里用到UITableViewCellAccessoryCheckmark

- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath
{
     if(indexPath.row==currentIndex){
         return UITableViewCellAccessoryCheckmark;
     }
     else{
         return UITableViewCellAccessoryNone;
     }
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
     [tableView deselectRowAtIndexPath:indexPath animated:NO];
     if(indexPath.row==currentIndex){
         return;
     }
       NSIndexPath *oldIndexPath = [NSIndexPath indexPathForRow:currentIndex
                                                   inSection:0];
     UITableViewCell *newCell = [tableView cellForRowAtIndexPath:indexPath];
     if (newCell.accessoryType == UITableViewCellAccessoryNone) {
         newCell.accessoryType = UITableViewCellAccessoryCheckmark;
         newCell.textColor=[UIColor blueColor];
     }
     UITableViewCell *oldCell = [tableView cellForRowAtIndexPath:oldIndexPath];
     if (oldCell.accessoryType == UITableViewCellAccessoryCheckmark) {
         oldCell.accessoryType = UITableViewCellAccessoryNone;
         oldCell.textColor=[UIColor blackColor];
     }
     currentIndex=indexPath.row;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyIdentifier"];
     if (cell == nil)
     {
         cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"MyIdentifier"] autorelease];
     }
     if(indexPath.row==currentIndex){
         cell.textColor=[UIColor blueColor];
     }
     else{
         cell.textColor=[UIColor blackColor];
     }
     cell.text=@"ttttttttttttttt";
     return cell;
}