Question

我的问题与此线程中的问题类似（我认为）： Cell shows on top of section header

但是，我已尝试该线程中的所有内容，并且只有异常错误。

以下是我的TableViewController中的一些相关方法：

TableViewController.h

@interface ToDoTableViewController : UITableViewController <Properties2ViewControllerDelegate, UITableViewDelegate>{
    UIButton *button;
}
@property (strong, nonatomic) NSMutableArray *taskArray;
@property (strong, nonatomic) NSMutableArray *completedArray;
-(IBAction)addCell:(id)sender;
-(void)buttonPressed:(id)sender;

TableViewController.m

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    UIView *headerView;
    NSString *sectionTitle = @"Incomplete Tasks";
    NSString *section2Title = @"Completed Tasks";
    UILabel *label = [[UILabel alloc]init];
    label.textColor = [UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f];
    label.font = [UIFont fontWithName:@"HelveticaNeue-Light" size:25];
    label.backgroundColor = [UIColor clearColor];

    CGRect buttonFrame = CGRectMake(280.0, 3.0, 30.0, 30.0);
    button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setFrame:buttonFrame];
    [button addTarget:self action:@selector(addCell:) forControlEvents:UIControlEventTouchUpInside];
    [button.layer setCornerRadius:8.0f];
    [button.layer setMasksToBounds:YES];
    [button.layer setBorderWidth:1.0f];
    [button setBackgroundColor:[UIColor clearColor]];
    [button.layer setBorderColor:[[UIColor colorWithWhite:0.3 alpha:0.7] CGColor]];
    button.userInteractionEnabled = YES;
    [button setImage:[UIImage imageNamed:@"plus_16.png"] forState:UIControlStateNormal];
    switch (section) {
        case 0:
            label.text = sectionTitle;
            label.frame = CGRectMake(10.0, 0.0, 320.0, 40.0);
            headerView = [[UIView alloc]initWithFrame:label.frame];
            [headerView addSubview:label];
            [headerView addSubview:button];
            break;
        case 1:
         label.text = section2Title;
            label.frame = CGRectMake(10.0, 60.0, 320.0, 40.0);
            headerView = [[UIView alloc]initWithFrame:label.frame];
            [headerView addSubview:label];
           // if (completedArray == nil)
          //      headerView.hidden = YES;
            break;

    }
    return headerView;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
    switch (section) {
        case 0:
            return 40.0;
            break;

        case 1:
            return 40.0;
            break;
    }
    return 0;
}
-(void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{
   Tasks *t = [[Tasks alloc]init];
    if (sourceIndexPath.row > destinationIndexPath.row) {
        // insert the object at the target row
        [taskArray insertObject:t atIndex:destinationIndexPath.row];

        // remove the original from the data structure
        [taskArray removeObjectAtIndex:(sourceIndexPath.row + 1)];
    }
    else if (sourceIndexPath.row < destinationIndexPath.row) { //from <- to

        // insert the object at the target row
        [taskArray insertObject:t atIndex:(destinationIndexPath.row + 1)];

        // remove the original from the data structure
        [taskArray removeObjectAtIndex:(sourceIndexPath.row)];
    }
}

---编辑---我解决了这个问题：

好吧我首先按照Martin R的建议消除两个部分标题之间的额外空间来解决这个问题。然后我实现了以下方法：

- (NSIndexPath *)tableView:(UITableView *)tableView 
    targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath 
    toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
{
    if (proposedDestinationIndexPath.section != sourceIndexPath.section)
    {
        //keep cell where it was...
        return sourceIndexPath;
    }

    //ok to move cell to proposed path...
    return proposedDestinationIndexPath;
}

移动时，我的UITableView中的单元格与第2部分的标题重叠

0 个答案: