以编程方式绘制游戏板

Question

尝试在iPad上绘制一个简单的15x15游戏板。

目前我的代码只在左上角打印了一张图片，这似乎是添加到imgViewArray中的最终图片，但不是100%确定。

func createImgBoard() {
    let cellWidth = 57
    let cellHeight = 57
    let squares = 225

    var k = 0
    var row = 0; var col = 0

    let topY = 500-4*cellHeight
    let leftX = 384-4*cellWidth

    var image: UIImage

    for i in 0...14 {
        for j in 0...14 {
            if board[i][j].symbol == "*" {
                image = UIImage(named: "grass57x57px")!
                imgViewArray[k].image = image
            }
            else {
                image = UIImage(named: "notgrass57x57px")!
                imgViewArray[k].image = image
            }
            k+=1
            print("Added img to imgViewArray " + String(k) + " as " + String(describing: image))
        }
    }

    for i in 0...squares-1 {

        imgViewArray[i].frame = CGRect.init(x: leftX+cellWidth*col, y: topY+cellHeight*row, width: cellWidth, height: cellHeight)

        self.view.addSubview(imgViewArray[i])

        col+=1
        if col > 14 {
            row+=1
            col=0
        }

    } 
}

编辑:由于某种原因，现在它甚至不能显示单个图像，即使代码根本没有改变...

Answer 1

为什么还要使用两个独立的循环呢？你可以在第一个(嵌套的)循环中做任何你需要的事情。

class MyViewController: UIViewController {

    let board: [[String]] = []
    let cellImageView: [[UIImageView]] = []

    func createBoardImageViews() {
        let cellWidth = 57
        let cellHeight = 57
        let boardWidth = 15
        let boardHeight = 15

        let x0 = 384 - 4 * cellWidth
        let y0 = 500 - 4 * cellHeight

        let imageForCellMarker: [String: UIImage] = [
            "*": UIImage(named: "grass")!,
            // etc., assuming you have other cell marker types
        ]
        let defaultCellImage = UIImage(named: "notgrass")!

        for y in 0 ..< boardHeight {
            cellImageView.append([])
            for x in 0 ..< boardWidth {
                let image = imageForCellMarker[board[y][x]] ?? defaultCellImage
                let frame = CGRect(x: x0 + x * cellWidth, y: y0 + y * cellHeight, width: cellWidth, height: cellHeight)
                let imageView = UIImageView(frame: frame)
                imageView.image = image
                cellImageView[y].append(imageView)
                view.addSubview(imageView)
            }
        }
    }

}