ios - 如何忽略 Storyboard上的 UICollectionViewCell 大小？

Question

我在 Storyboard上有单元格大小:

但是我想根据设备的屏幕大小在代码中设置单元格大小，然后调用下一个委托(delegate)方法:

extension GraphicsViewController: UICollectionViewDelegateFlowLayout {

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: 0.675 * self.view.frame.size.width, height: 0.625 * self.view.frame.size.height)
    }

}   

我调用这个单元格的方法:

func draw(coordinates: [CGPoint]?) {
        let width = self.temperatureGraphicView.frame.size.width
        let height = self.temperatureGraphicView.frame.size.height
        temperatureBackGroundView.layer.borderWidth = 2
        temperatureBackGroundView.layer.borderColor = UIColor.black.cgColor
        temperatureBackGroundView.layer.cornerRadius = 10
        humidityBackGroundView.layer.borderWidth = 2
        humidityBackGroundView.layer.borderColor = UIColor.black.cgColor
        humidityBackGroundView.layer.cornerRadius = 10
        let verticalLines = setFramesArrays().0
        let horizontalLines = setFramesArrays().1
        for i in stride(from: 0, to: verticalLines.count - 1, by: 2) {
            drawFrame(fromPoint: verticalLines[i], toPoint: verticalLines[i + 1], graphicNumber: 0)
            drawFrame(fromPoint: verticalLines[i], toPoint: verticalLines[i + 1], graphicNumber: 1)
        }
        for i in stride(from: 0, to: horizontalLines.count - 1, by: 2) {
            drawFrame(fromPoint: horizontalLines[i], toPoint: horizontalLines[i + 1], graphicNumber: 0)
            drawFrame(fromPoint: horizontalLines[i], toPoint: horizontalLines[i + 1], graphicNumber: 1)
        }
    }   

我的 View 框架基于 Storyboard上单元格的框架，而我的网格绘图不正确:

当我重新加载集合中的数据时，我有这个:

我的问题是如何忽略 Storyboard上的单元格框架并以编程方式设置它？我可以用输入 View 框架做什么？

Answer 1

我假设您在 collectionView(collectionView:indexPath:) 数据源方法中调用 draw 函数。您必须调用 cell.layoutIfNeeded() 行以使用新大小重新布局单元格中的所有 subview 。