ios - 带有 UISwitch 的 UITableViewCell 不会重绘？

Question

我有一个 uitableviewcell，其中包含一个 uiswitch(obj-c)。开关工作正常，但是当点击表格 View 外的按钮时，我需要单元格中的 uiswitch 重绘并使其禁用。我正在尝试以下方法，但它不起作用？我的 CellForRowAtIndex 被调用，我的代码块被调用，说禁用 UISwitch 但没有任何 react ？

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        thingic NSString *cellIdentifier = @"Cell";

        NSString *danID = [[NSUserDefaults standardUserDefaults]objectForKey:kSavingdanID];


        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
        if (cell == nil) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellSelectionStyleNone reuseIdentifier:cellIdentifier];
            cell.backgroundColor = [UIColor clearColor];
            cell.textLabel.font = [UIFont fontWithName:@"HelveticaNeue" size:21];
            cell.textLabel.textColor = [UIColor whiteColor];
            cell.textLabel.highlightedTextColor = [UIColor lightGrayColor];
            cell.selectedBackgroundView = [[UIView alloc] init];
        }


        if(indexPath.row == 0) { // Mute thing Calls

            cell.textLabel.text = @"Public Calls";
            self.thingSwitchView = [[UISwitch alloc] initWithFrame:CGRectMake(170, 13, 0, 0)];
            [cell.contentView addSubview:self.thingSwitchView];
    //        cell.accessoryView = switchView;
            [self.thingSwitchView setOn:YES animated:NO];
            [self.thingSwitchView addTarget:self action:@selector(thingSwitchChanged:) forControlEvents:UIControlEventValueChanged];
            cell.backgroundColor = [UIColor clearColor];
            cell.contentView.backgroundColor = [UIColor colorWithRed: 0.0/255.0 green: 0.0/255.0 blue: 0.0/255.0 alpha: 0.4];

        } else if(indexPath.row == 1) { // Mute boo Calls

            cell.textLabel.text = @"boo Calls";
            self.booSwitchView = [[UISwitch alloc] initWithFrame:CGRectMake(170, 12, 0, 0)];
            [cell.contentView addSubview:self.booSwitchView];
    //        cell.accessoryView = switchView;
            [self.booSwitchView setOn:YES animated:NO];
            [self.booSwitchView addTarget:self action:@selector(booSwitchChanged:) forControlEvents:UIControlEventValueChanged];
            cell.backgroundColor = [UIColor clearColor];
            cell.contentView.backgroundColor = [UIColor colorWithRed: 0.0/255.0 green: 0.0/255.0 blue: 0.0/255.0 alpha: 0.4];

        } else {
            // do nothing
        }


        if([NSString isEmpty:danID]){
            [self.thingSwitchView setEnabled:NO];
            [self.booSwitchView setEnabled:NO];
            [cell.backgroundView setNeedsDisplay];
            [cell setNeedsDisplay];
        }

        return cell;
    }

Answer 1

通过继承 UITableViewCell 并使用委托(delegate)，我成功地实现了开关单元。

@class EGSwitchCell;

@protocol EGSwitchCellDelegate <NSObject>

-(void)switchCellDidChange:(EGSwitchCell *)switchCell;

@end

@interface EGSwitchCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UISwitch *mySwitch;
@property (weak, nonatomic) IBOutlet UILabel *labelTitle;

@property (nonatomic, weak) id<EGSwitchCellDelegate> delegate;

-(IBAction)switchChanged:(id)sender;

@end

希望能给你一些方向。