UITableViewCell diventa nero quando viene selezionato a livello di programmazione

Question

Mi chiedevo perché questo codice mi avrebbe dato UITableViewCells nero quando ho impostato la proprietà selezionata su ON. Se lo faccio, il contenuto della cella diventa completamente nero e non ho idea del perché.

Ecco il codice

// 
// TableViewAdapter.m 
// TableviewScanMode 
// 
// Created by Nick Overdijk on 8/26/10. 
// Copyright 2010 Nick Overdijk. All rights reserved. 
// 

#import "TableViewAdapter.h" 
#import "Model.h" 

@implementation TableViewAdapter 

@synthesize model; 

- (id) initWithModel: (Model*) model { 
    self = [super init]; 
    if(self != nil){ 
     self->model = [model retain]; 
    } 

    return self; 
} 

- (void) dealloc { 
    [model release]; 
    [super dealloc]; 
} 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
    return [[model cellData] count]; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
    return [[[model cellData] objectAtIndex: section] count]; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    static NSString *CellIdentifier = nil; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
    } 

    cell.textLabel.text = [[[model cellData] objectAtIndex: indexPath.section] objectAtIndex: indexPath.row]; 

    if(indexPath.row == [[model currentSelected] row] && indexPath.section == [[model currentSelected] section]){ 
     cell.selected = YES; 
    } else { 
     cell.selected = NO; 
    } 

    return cell; 
} 

@end 

// 
// RootViewController.m 
// TableviewScanMode 
// 
// Created by Nick Overdijk on 8/24/10. 
// Copyright Nick Overdijk 2010. All rights reserved. 
// 

#import "RootViewController.h" 
#import "Model.h" 
#import "TableViewAdapter.h" 


@implementation RootViewController 


#pragma mark - 
#pragma mark View lifecycle 

- (void)viewDidLoad { 
    model = [[Model alloc] init]; 
    [model addObserver:self 
      forKeyPath:@"updatedIndexPaths" 
       options:NSKeyValueObservingOptionNew 
       context:NULL 
    ]; 

    [model startSelectionRotation]; 

    adapter = [[TableViewAdapter alloc] initWithModel: model]; 
    self.tableView.dataSource = adapter; 

    [super viewDidLoad]; 
} 

- (void)dealloc { 
    [adapter release]; 
    [model release]; 
    [super dealloc]; 
} 

#pragma mark - 
#pragma mark KVO updates 
- (void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { 
    NSArray * reloadThese = [change objectForKey: NSKeyValueChangeNewKey]; 
    [self.tableView reloadRowsAtIndexPaths: reloadThese withRowAnimation: UITableViewRowAnimationFade]; 
} 

#pragma mark - 
#pragma mark Table view delegate 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
} 


@end 

Se avete bisogno di più codice, grido. :)

Molte grazie in anticipo, Nick

Answer 1

ho avuto lo stesso problema e risolto spostando il cell.selected = YES in tableView:willDisplayCell:forRowAtIndexPath invece.

penso che potrebbe essere correlato alla nota in fondo la documentazione UITableViewCell sulle modifiche apportate al colore di sfondo che richiedono l'uso di tableView: willDisplayCell: forRowAtIndexPath (presumibilmente selected imposta il colore di sfondo).