ios - 如何在 `UIImageView` 中的自定义单元格中更改 `UITableView`

Question

我在 UITableView 的自定义单元格中有 UIImageView 并且想在 didSelectRowAtIndexPath 中更改该图像

它在 UITableView 之外与 UIImageView 一起工作，但不在其中工作。

我正在使用这个代码..

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *string = [[self.itemsInTable objectAtIndex:indexPath.row] objectForKey:@"Name"];
    ExpandCell *cell = [self.menuTableView dequeueReusableCellWithIdentifier:@"Cell"];
    UIImage *image;

    if ([string isEqualToString:@"News"]) {

        if ([[self.viewImage image] isEqual:[UIImage imageNamed:@"down-arrow.png"]]) {
            NSLog(@"down");
            image = [UIImage imageNamed:@"up-arrow.png"];

        } else {
            NSLog(@"up");
            image = [UIImage imageNamed:@"down-arrow.png"];
        }

        cell.imgExpand.image = image;
        self.viewImage.image = image;

    }
}

我该如何解决？

Answer 1

首先为您的 UIImageView 分配一个标签号(比如 10)。然后将此代码写入您的 didSelectRowAtIndexPath 方法

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
UIImageView *yourImageView = (UIImageView*)[cell viewWithTag:10];//Replace yourImageView with the name of your UIImageView on custom cell

//--------- Your code ------
NSString *str = [[self.itemsInTable objectAtIndex:indexPath.row] objectForKey:@"Name"];
UIImage *image;

if ([str isEqualToString:@"News"])
{

    if ([[self.viewImage image] isEqual:[UIImage imageNamed:@"down-arrow.png"]]) 
    {
        NSLog(@"down");
        image = [UIImage imageNamed:@"up-arrow.png"];

    }
    else {
        NSLog(@"up");
        image = [UIImage imageNamed:@"down-arrow.png"];
    }

    [yourImageView setImage:image];
    [self.viewImage setImage:image];
}

我认为这会解决您的问题。