ios - 设置添加到表格 View 中单元格的图像的大小

Question

我正在从 plist 将图像添加到我的单元格 View 中。我也使用 url 保存到 plist 的图像也有同样的问题。它们的尺寸不同。我想将它们调整为特定大小，以便它们看起来都一样。我曾尝试使用:

cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
cell.imageView.clipsToBounds = YES;

它不起作用。我尝试了很多其他的事情，但没有成功。我查了一堆东西，找不到任何有用的东西。这是我的行方法单元格:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: CellIdentifier];
    }

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        cell.textLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"city"];
        cell.detailTextLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"state"];
        cell.imageView.image = [UIImage imageNamed:[[self.searchResults objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];
        cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
        cell.imageView.clipsToBounds = YES;
    } else {
        cell.textLabel.text = [[content objectAtIndex:indexPath.row] valueForKey:@"city"];
        cell.detailTextLabel.text = [[content objectAtIndex:indexPath.row] valueForKey:@"state"];
        // Construct the expected URL for the image.
        NSURL *imageFileURL = [[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask][0];
        imageFileURL = [imageFileURL URLByAppendingPathComponent:[[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"] isDirectory:NO];
        // Attempt to load the image at the above URL.
        cell.imageView.image = [[UIImage alloc] initWithContentsOfFile:[imageFileURL path]];
        if (!cell.imageView.image)
            cell.imageView.image = [UIImage imageNamed:[[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];
        cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
        cell.imageView.clipsToBounds = YES;
    }

    return cell;
}

对于我的生活，我无法弄清楚这一点。我知道这可能很容易解决，但我想不出其他任何东西。

编辑:

按照建议，我创建了一个自定义单元格，在其中声明 layoutSubviews，然后将单元格子类化如下:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    MyCostumCell *cell = (MyCostumCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[MyCostumCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: CellIdentifier];
    }

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        cell.textLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"city"];
        cell.detailTextLabel.text = [[searchResults objectAtIndex:indexPath.row] valueForKey:@"state"];
        cell.imageView.image = [UIImage imageNamed:[[self.searchResults objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];
        //cell.textLabel.textColor = [UIColor colorWithRed:153.0/255.0f green:0.0/255.0f blue:0.0/255.0f alpha:1];
    } else {

        cell.textLabel.text = [[content objectAtIndex:indexPath.row] valueForKey:@"city"];
        cell.detailTextLabel.text = [[content objectAtIndex:indexPath.row] valueForKey:@"state"];
        // Construct the expected URL for the image.
        NSURL *imageFileURL = [[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask][0];
        imageFileURL = [imageFileURL URLByAppendingPathComponent:[[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"] isDirectory:NO];
        // Attempt to load the image at the above URL.
        cell.imageView.image = [[UIImage alloc] initWithContentsOfFile:[imageFileURL path]];
        if (!cell.imageView.image)
            cell.imageView.image = [UIImage imageNamed:[[self.content objectAtIndex:indexPath.row] valueForKey:@"cityImage"]];
    }

    return cell;
}

再次，它没有工作。这是屏幕截图:

Answer 1

你会继承 UITableViewCell。但是您不必按照 Dante 的建议创建一个全新的 View 层次结构，而是覆盖 -layoutSubviews

@interface VideoItemCell : UITableViewCell
@end


@implementation VideoItemCell
-(void)layoutSubviews
{
    [super layoutSubviews];
    self.imageView.contentMode = UIViewContentModeScaleAspectFill;
    self.imageView.frame = CGRectMake(self.imageView.frame.origin.x, self.imageView.frame.origin.y, 100, 100);
}

@end

在 TableView Controller 中

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    VideoItemCell *cell = (VideoItemCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[VideoItemCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: CellIdentifier];
    }

    //…
    return cell;
}