Question

我尝试使用sliderChanged（滑块值已更改）方法更改单元格内的标签（titleOutlet），但我不知道如何访问标签插座，就像我们使用cellForRowAtIndexPath一样。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CustomisationCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    CustomisationObject *movie = (localArray)[indexPath.row];

    cell.titleOutlet.text = movie.localChannel;
    cell.sliderOutlet.value = movie.localValue.integerValue;

    return cell;
}

- (IBAction)sliderChanged:(id)sender {

    UISlider *slider = (UISlider *)sender;
    NSLog(@"%f", [slider value]);

    CGPoint hitPoint = [sender convertPoint:CGPointZero toView:self.tableView];
    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:hitPoint];
    NSLog(@"%ld", (long)indexPath.row);
}

Answer 1

假设您拥有单元格的indexPath，则可以使用：

CustomisationCell *cell = (CustomisationCell *)[self.tableView cellForRowAtIndexPath:indexPath];
NSLog(@"%@", cell.titleOutlet.text);

Answer 2

我建议在UISlider上使用标记并将其设置为行索引，以便稍后获取所需的行。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CustomisationCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    CustomisationObject *movie = (localArray)[indexPath.row];

    cell.titleOutlet.text = movie.localChannel;
    cell.sliderOutlet.value = movie.localValue.integerValue;
    cell.sliderOutlet.tag = indexPath.row;

    return cell;
}

- (IBAction)sliderChanged:(id)sender {

    UISlider *slider = (UISlider *)sender;
    NSLog(@"%f", [slider value]);

    NSInterger rowIndex = [sender tag];

    CustomisationCell *cell = (CustomisationCell *)[self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForItem:rowIndex inSection:0];

    cell.titleOutlet.text = "new text from slider";

}

在方法内部使用自定义单元出口

2 个答案: