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我有一个实现 UISearchBarDelegate 和 UISearchDisplayDelegate 的表视图控制器。我有一个按钮来切换我的表格视图的编辑视图。在编辑模式下,用户可以选择许多行并复制、删除它们等。如果我尝试在搜索栏中输入内容,而表格视图处于编辑模式,shouldReloadTableForSearchString 方法将触发,然后我重新-使用更新的谓词从核心数据中获取我的数据,并从函数返回 YES,指示应该重新加载表视图。当过滤结果出现时,它们不处于编辑模式,即使在 cellForRowAtIndexPath 我可以看到 tableView isEditing 是 YES。我看不到多项选择的圆圈。我需要能够让用户过滤他们的列表以显着限制结果,

为什么结果没有在编辑模式下显示?

编辑模式,不使用搜索栏:

编辑模式,不使用搜索栏

在编辑模式下搜索会产生不处于编辑模式且未设置样式的结果:

在编辑模式下搜索会产生未处于编辑模式且未设置样式的结果

提前致谢, 亚历克斯

这是 shouldReloadTableForSearchString 方法:

    - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
NSPredicate *predicate = nil;
if ([searchString length])
{
    NSArray* filteredTags = nil;
    if ([searchString length] < 3)
    {
        // Check for tags starting with 1 or 2 characters.
        filteredTags = [[tagResultsController fetchedObjects] filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(TagEntity* te, NSDictionary *bindings)
        {
            if ([[[te.name lowercaseString] substringToIndex:[searchString length]] isEqualToString:[searchString lowercaseString]])
                return YES;

            return NO;
        }]];

    }
    else
    {
        // Check for tags with 3 or more consecutive characters anywhere in name
        filteredTags = [[tagResultsController fetchedObjects] filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(TagEntity* te, NSDictionary *bindings)
        {
           if ([[te.name lowercaseString] rangeOfString:[searchString lowercaseString]].location != NSNotFound)
               return YES;

           return NO;
        }]];
    }

    //  OR ANY(self.tags) in %@
    predicate = [NSPredicate predicateWithFormat:
        @"ANY(self.songlists) in %@ AND (name contains[cd] %@ OR artist_name contains[cd] %@ OR number = %@ OR ANY(tag_entities) in %@)",
        currentSonglist.songs, searchString, searchString, searchString,filteredTags];

    [self.fetchedResultsController.fetchRequest setPredicate:predicate];

    NSError *error = nil;
    if (![[self fetchedResultsController] performFetch:&error]) {
        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
        abort();
    }
    // Return YES to cause the search result table view to be reloaded.

}

return YES;

}

这是 .h 文件中我的核心数据表视图的标题:

    @interface SonglistTVC : CoreDataTableViewController
<UISearchBarDelegate, 
UISearchDisplayDelegate,
UIPickerViewDataSource,
UIPickerViewDelegate,
UIActionSheetDelegate,
AddSongTVCDelegate,
ListSelectorDelegate>

我知道它正在使用我的表视图控制器,因为 cellForRowAtIndexPath 和 didSelectRowAtIndexPath 都在触发。我可以在里面进行调试,并且在表格视图中将 isEditing 设置为 YES。但是表格视图并没有反映它正确的编辑模式样式。

这是 cellForRowAtIndexPath 在搜索框中输入字母后立即触发。

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *identifier = @"SongCell";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:identifier];

Song* song = [self.fetchedResultsController objectAtIndexPath:indexPath];     

UILabel* artistLabel    = (UILabel*)[cell viewWithTag:ARTIST_NAME_TAG];
UILabel* songLabel      = (UILabel*)[cell viewWithTag:SONG_NAME_TAG];
UILabel* keyLabel       = (UILabel*)[cell viewWithTag:KEY_TAG];
UILabel* numberLabel    = (UILabel*)[cell viewWithTag:NUMBER_TAG];

//artistLabel.font = [UIFont systemFontOfSize:17];
[artistLabel setText:   song.artist_name];
[songLabel setText:     song.name];
//[songLabel setFont:[UIFont systemFontOfSize:16]];
[keyLabel setText:      song.key];
[numberLabel setText:   [NSString stringWithFormat:@"%@", song.number]];


UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,61)];
UIView *selectedBackView = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,61)];

CAGradientLayer *backGradient = [[CAGradientLayer alloc] init];
backGradient.frame = cell.layer.bounds;

CAGradientLayer *selectedGradient = [[CAGradientLayer alloc] init];
selectedGradient.frame = cell.layer.bounds;

if (song.status == [NSNumber numberWithUnsignedInt: 1])
{
    [backGradient setColors:[NSArray arrayWithObjects:
                           (id)[[UIColor colorWithRed:240.0f/255.0f green:200.0f/255.0f blue:200.0f/255.0f alpha:1.0f] CGColor],
                           (id)[[UIColor colorWithRed:1 green:1 blue:1 alpha:1.0f] CGColor],
                           nil]];
}
else if (song.status == [NSNumber numberWithUnsignedInt: 2])
{
    [backGradient setColors:[NSArray arrayWithObjects:
                         (id)[[UIColor colorWithRed:240.0f/255.0f green:240.0f/255.0f blue:200.0f/255.0f alpha:1.0f] CGColor],
                         (id)[[UIColor colorWithRed:1 green:1 blue:1 alpha:1.0f] CGColor],
                         nil]];
}
else if (song.status == [NSNumber numberWithUnsignedInt: 3])
{
    [backGradient setColors:[NSArray arrayWithObjects:
                         (id)[[UIColor colorWithRed:200.0f/255.0f green:240.0f/255.0f blue:200.0f/255.0f alpha:1.0f] CGColor],
                         (id)[[UIColor colorWithRed:1 green:1 blue:1 alpha:1.0f] CGColor],
                         nil]];
}
[selectedGradient setColors:[NSArray arrayWithObjects:
                     (id)[[UIColor colorWithRed:255.0f/255.0f green:160.0f/255.0f blue:60.0f/255.0f alpha:1.0f] CGColor],
                     (id)[[UIColor colorWithRed:1 green:1 blue:1 alpha:0.7f] CGColor],
                     nil]];


if (![self.tableView isEditing] )
{
    cell.backgroundView = backView;
    [cell.backgroundView.layer insertSublayer:backGradient atIndex:1];

    cell.selectedBackgroundView = selectedBackView;
    [cell.selectedBackgroundView.layer insertSublayer:selectedGradient atIndex:1];
}
else
{
    //cell.backgroundView = backView;
    //[cell.backgroundView.layer insertSublayer:backGradient atIndex:1];
    cell.selectedBackgroundView = backView;
    [cell.selectedBackgroundView.layer insertSublayer:backGradient atIndex:1];
}

for (NSIndexPath* ip in selectedIndexes)
{
    [self.tableView selectRowAtIndexPath:ip animated:YES scrollPosition:UITableViewScrollPositionNone];
}

[sortOrderPicker reloadAllComponents];
[self sendPickerDownAnimated:NO];

return cell;

}

我使用分段控件内的按钮来打开/关闭编辑:

    - (IBAction)segmentChanged:(id)sender{
UISegmentedControl* sg = (UISegmentedControl*)sender;
if (sg.selectedSegmentIndex == 0)
{
    // Edit
    if (![self.tableView isEditing])
    {
        [self.tableView setEditing:YES animated:YES];
        [self.navigationController setToolbarHidden:NO animated:YES];
    }
    else
    {
        [self.tableView setEditing:NO animated:YES];
        [self.navigationController setToolbarHidden:YES animated:YES];
        selectedIndexes = nil;
    }
    [self.tableView reloadData];
}
else
{
    // Sort
    if (pickerShown)
        [self sendPickerDownAnimated:YES];
    else
        [self bringPickerUpAnimated:YES];
}

}

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2 回答 2

3

问题在于 UISearchDisplayController 自动为您做了很多事情。它创建自己的表视图来显示搜索结果,并管理该表视图。您可以将自己设置为该表格视图的数据源和委托,默认情况下会自动为您完成,但它不是您的表格视图,您无法控制它。如果您想要更大的手来指定这是什么表视图,您需要设置搜索显示控制器的searchResultsTableView; 或者您可以在事情进行时获得对它的引用(例如,通过 UISearchDisplayController 自己的委托方法)。但即便如此,你也不会是管理结果表视图的 UITableViewController;这完全是 UISearchDisplayController 内部的。如果您不喜欢这样,一个简单的解决方案是:不要使用 UISearchDisplayController - 考虑另一个界面。

于 2013-01-04T18:01:00.217 回答
1

就像马特说的那样,在搜索模式下,UISearchDisplayController 有自己的 UITableView,所以要在编辑模式下在 UITableView 中保持相同的设计,你需要将你在 self.tableView 中设置的相同设计参数传递给它。

-(void)searchDisplayController:(UISearchDisplayController *)controller didLoadSearchResultsTableView:(UITableView *)tableView
{
    tableView.backgroundColor = self.tableView.backgroundColor;
    tableView.separatorColor = [UIColor redColor];
    tableView.separatorInset = UIEdgeInsetsMake(0, 0, 0, 0);
}
于 2014-07-15T19:07:08.060 回答