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I'm making a phonebook.

I'm trying to create a UITableView that has a prototype cell in it that contains a UISwitch which describes if a particular contact is public or private.

How can I create this such that the UISwitch keeps its toggle status even during scroll? dequeueReusableCellWithIdentifier is giving me a lot of problems in that it doesn't save the togglestate of the UISwitches.

Though I love the memory savings, toggling the switches within cellForRowAtIndexPath (according to a contact's privacy boolean value) is not working to always display the public/private status of a contact.

See screenshot below of what I'm trying to build:

enter image description here

EDIT: Here's my cellForRowAtIndexPath:

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

    AHBContact *thisContact = nil;

    AHBBrowseContactCell *cell  =[tableView dequeueReusableCellWithIdentifier:@"BROWSECELL"];

    // from  contacts list
    thisContact = [self.contacts[indexPath.section] allValues][0][indexPath.row];

    cell.customPublicSwitch.onTintColor = [AHBUtilities greenColor];
    cell.customPublicSwitch.onText= @"Public";
    cell.customPublicSwitch.offText=@"Private";

    if(thisContact.privacy){
        NSLog(@"public %@",thisContact.fullName);
       cell.customPublicSwitch.on = YES;

    }
    else{
        NSLog(@"private %@", thisContact.fullName);

       cell.customPublicSwitch.on = NO;

    }

    cell.labelName.text = thisContact.fullName;
    cell.labelName.font = [AHBUtilities regularFontWithSize:cell.labelName.font.pointSize];
    cell.imageViewIcon.image = [AHBIcons phoneIconForCategory:thisContact.category];

    cell.textLabel.backgroundColor = [UIColor clearColor];
    cell.backgroundColor = [UIColor colorWithWhite:1 alpha:0.55];

    return cell;
}

SECOND EDIT: Here's my "togglePublic" method that runs on "valueChanged" of the switch

    -(IBAction)togglePublic:(UIControl *)button withEvent:(UIEvent *)event {

        DCRoundSwitch *switch1 = (DCRoundSwitch *)button;
        UITableViewCell *cell = (UITableViewCell *)switch1.superview;
        NSIndexPath *indexPath = [self.tableview indexPathForCell: cell.superview];

        if ( indexPath == nil ){

            return;

        }

        AHBContact *contact = [self.contacts[indexPath.section] allValues][0][indexPath.row];

        contact.privacy = !contact.privacy;

        NSLog(@"Public switch toggled for: %@", contact.firstName);

        [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

[[AHBContactsController sharedController] updateContact:contact completion:^(id result) {

        [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];


           NSLog (@"Public/Private updated%@",result);


       } failure:^(NSError *error) {

           [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

           UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Sync Problem"
                                                             message:@"Could save changes. Please try again."
                                                            delegate:self
                                                   cancelButtonTitle:@"Ok"
                                                   otherButtonTitles:nil];
           [message show];



       }];

    }
4

2 回答 2

0

也许您在cellForRowAtIndexPath:中创建的开关是问题所在。尝试这样做。使用 UILabel 和 UISwitch 创建自定义单元格。制作这些 IBOutlets 和自定义单元格的属性并将它们连接起来。现在在 cellForRowAtIndexPath: 方法中使用自定义单元格而不是默认单元格。由于单元格被重用并且每次当单元格在屏幕上可见时都会调用此方法，我猜想每次创建 UISwitch 然后分配其状态时都会发生不一致

    static NSString *cellIdentifier = @"CellIdentifier";

        YourCustomCell *cell = (YourCustomCell*)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
        if (!cell)
        {
            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"YourCustomCell" owner:self options:nil];
            for (id currentObject in topLevelObjects){
                if ([currentObject isKindOfClass:[UITableViewCell class]]){
                    cell =  (YourCustomCell *) currentObject;
                    break;
                }
            }
        }

       // from  contacts list
            thisContact = [self.contacts[indexPath.section] allValues][0][indexPath.row];
    if(thisContact.privacy){
            NSLog(@"public %@",thisContact.fullName);
           cell.customPublicSwitch.on = YES;

        }
        else{
            NSLog(@"private %@", thisContact.fullName);

           cell.customPublicSwitch.on = NO;

        }

        cell.labelName.text = thisContact.fullName;
        cell.labelName.font = [AHBUtilities regularFontWithSize:cell.labelName.font.pointSize];
        cell.imageViewIcon.image = [AHBIcons phoneIconForCategory:thisContact.category];
        cell.textLabel.backgroundColor = [UIColor clearColor];
        cell.backgroundColor = [UIColor colorWithWhite:1 alpha:0.55];
     return cell;
}

希望这可以帮助 ：）

于 2013-06-27T06:27:30.570 回答
0

尝试在委托方法中设置它

- (void)tableView:(UITableView *)tableView willDsiplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    UISwitch *switch = cell.yourCellSwitch;
    switch.on = yourSwitchVariable;
}
于 2013-06-26T21:17:06.890 回答