Question

我有一个表视图控制器，它实现了UISearchBarDelegate和UISearchDisplayDelegate。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，用户可以选择多行并复制它们，删除它们等等。如果我尝试在搜索栏中输入内容，而表视图处于编辑模式，则会触发shouldReloadTableForSearchString方法，并且使用更新的谓词从核心数据中获取数据，并从函数返回YES，指示应重新加载表视图。当显示过滤结果时，它们不处于编辑模式，即使在cellForRowAtIndexPath中我可以看到tableView isEditing为YES。我无法看到多个选择的圆圈。在选择多个项目之前，我需要能够让用户过滤其列表以显着限制结果。

为什么结果没有出现在编辑模式中？

编辑模式，不使用搜索栏：

edit mode, without using the search bar

在编辑模式下搜索会生成不处于编辑模式且未设置样式的结果：

Searching in edit mode produces results that are not in edit mode and not styled

提前致谢，亚历

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;

}

这是我的核心数据表视图的.h文件标题：

    @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。我可以调试内部，并在表视图上将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。

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

    - (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切换编辑ON / OFF：

    - (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];
}

}

Answer 1

问题在于UISearchDisplayController会自动为您做很多事情。它创建自己的表视图以显示搜索结果，并管理该表视图。您可以将自己设置为该表视图的数据源和委托，并且默认情况下会自动为您完成，但它不是您的表视图而您无法控制它。如果你想要一个更大的手指定这是什么表视图，你需要设置搜索显示控制器的searchResultsTableView;或者你可以随着事情的进行获得它的引用（例如通过UISearchDisplayController自己的委托方法）。但即便如此，您也不会成为管理结果表视图的UITableViewController;这完全是内部的UISearchDisplayController。如果您不喜欢这样，一个简单的解决方案是：不要使用UISearchDisplayController - 想想另一个接口。

Answer 2

喜欢 matt 说，在搜索模式下，UISearchDisplayController有自己的UITableView，所以为了在UITableView中保持相同的设计，在编辑模式下，你需要传递相同的设计参数。在你的self.tableView中设置。

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

在编辑模式下使用带有UITableView的UISearchBar时，搜索结果不处于编辑模式

2 个答案: