無論方向如何，如何將UIImageView居中於UITableViewCell中？

Question

我正在嘗試使用以下代碼在UITableViewCell中將UIImageView寬度方向居中：

        // self.cover_image is a UIImage variable
        // cell is a UITableCellView

        UIImageView* backcover_imageview = [[[UIImageView alloc] initWithImage:self.cover_image] autorelease];
        [backcover_imageview sizeToFit];

        //center image
        //float xPos = cell.contentView.frame.size.width - (self.cover_image.size.width/2);

        //TODO: need better solution
        //Eyeballing attempt:
        float xPos = self.cover_image.size.width - 25;
        CGRect bookcover_frame = backcover_imageview.frame;
        bookcover_frame.origin.x = xPos;
        backcover_imageview.frame = bookcover_frame;
        backcover_imageview.tag = 9000;
        backcover_imageview.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;

        [cell.contentView addSubview:backcover_imageview];

我試圖將UIImageView放在UITableCellView中，而不管iPad或iPhone設備的朝向如何。有人知道正確的方法嗎？

Answer 1

我添加了兩個自動調整大小的蒙版，並使用您的代碼和PengOne的答案獲得了不錯的效果：

playImage.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;
[cell.contentView addSubview:playImage];
playImage.center = CGPointMake(cell.contentView.bounds.size.width/2,cell.contentView.bounds.size.height/2);

Answer 2

在將backcover_imageView添加到單元格的contentView之后，使用它來使其居中：

imageView.center = CGPointMake(cell.contentView.bounds.size.width/2,cell.contentView.bounds.size.height/2);

Answer 3

您可以嘗試將單元格的中心屬性分配給圖像視圖的中心屬性嗎？

像這樣

imageView.center = cell.center;

然后將其添加到單元格中。

Answer 4

您可以使用單元格的中心錨點將圖像保持在中心：

image.centerXAnchor.constraint(equalTo: cell.centerXAnchor).isActive = true
image.centerYAnchor.constraint(equalTo: cell.centerYAnchor).isActive = true