设置在tableview中添加到单元格的图像的大小 [英] setting the size of the image added to cell in tableview

问题描述

我正在从plist中将图像添加到我的单元格视图中。此外，我对使用网址保存到plist的图像也有同样的问题。它们的大小不同。我想将它们调整到一定的大小，以便它们看起来都一样。我试图使用：

I am adding images to my cell view from a plist. Also I have the same issue with images that I save to the plist using a url as well. They are different sizes. I'd like to resize them to certain size so they would all appear the same. I have tried to use:

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

它不起作用。我尝试过其他一些东西并没有成功。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：

It did not work. I have tried a bunch of other things and did not succeed. I have looked up a bunch of stuff and can't find anything helpful. Here is my cell for row method:

- (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，我无法理解这一点。我知道这可能很容易解决，但我想不出别的。

For the life of me I can't figure this out. I know it might be a easy fix but i can't think of anything else.

编辑：

根据建议，我创建了一个自定义单元格，在那里声明了layoutSubviews，然后按如下方式对单元格进行了子类化：

As suggested, I created a custom cell, declared layoutSubviews in there and then subclassed the cell as follows:

- (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;
}

同样，它不起作用。这是屏幕截图：

Again, it did not work. Here is the screen shot:

推荐答案

您将继承UITableViewCell。但你不必创建Dante提出的全新视图层次，但覆盖 -layoutSubviews

you would subclass UITableViewCell. but you dont have to create a whole new view hierachy as proposed by Dante, but overwrite -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控制器中

In the tableview controller

- (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;
}

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