Question

我创建了一个称为CircleView的UIView，它绘制了一个圆。只需单击一下按钮即可添加该文件，并在另一个视图canvasView中将UITapGestureRecognizer作为子视图定位。这是圆的代码，它的工作原理是：

@IBAction func tapCircle(_ sender: UITapGestureRecognizer) {
        let tapPoint2 = sender.location(in: canvasView)
        let shapeCircle = CircleView(origin: tapPoint2)
        canvasView.addSubview(shapeCircle)
        shapeCircle.tag = 300        
}

@IBAction func circleDraw(_ sender: UIButton) {
        canvasView.isUserInteractionEnabled = true
        tapCircle.isEnabled = true
        tapRect.isEnabled = false
        tapGRQ.isEnabled = false

        canvasView.setNeedsDisplay()
}

一切都很好，但我想知道是否有可能通过单击按钮来更改此形状的颜色。非常感谢。

Answer 1

为形状数组创建全局变量

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Disallow: /*/searchresults.aspx
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然后在创建新var circleShapes = [UIView]() var squareShapes = [UIView]() ...后将其添加到特定数组

UIView

现在只需为特定数组内的每个视图更改let shapeCircle = CircleView(origin: tapPoint2) canvasView.addSubview(shapeCircle) circleShapes.append(shapeCircle) ...

backgroundColor

或者如果您的circleShapes.forEach { $0.backgroundColor = /* UIColor */ } ...仅包含 shapes 子视图，则每个 shape 都有其自己的canvasView子类，并且您想在同一颜色下进行更改时间，您可以根据 shape

的类型更改UIView

backgroundColor

将颜色更改为添加为子视图的形状

1 个答案: