如何解决Swift-如何使用CAShapeLayer绘制3颗类似棒球场的钻石?
我有一个视图控制器。在内部,我有一个视图(A),在这个视图(A)中,我想用CAShapeLayer像棒球场一样绘制3颗钻石。您可以在下面看到我要绘制的示例。
但是我不知道该怎么做?你能帮我吗?
最诚挚的问候
解决方法
应使用嵌套UIStackView
和CATransform3DMakeRotation
轻松创建。
在https://github.com/sauvikapple/StackOverflowAns4229726处检查我的代码。
,设置您的容器视图和棒球钻石视图:
let dummyWiew: UIView = {
let v = UIView()
v.backgroundColor = .gray
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
let dummyWiew2: UIView = {
let v = UIView()
v.backgroundColor = .yellow
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
let dummyWiew3: UIView = {
let v = UIView()
v.backgroundColor = .gray
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
let containerView: UIView = {
let v = UIView()
v.backgroundColor = .clear
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
在viewDidLoad中设置容器视角旋转之后,创建stacView并添加约束:
view.backgroundColor = UIColor(white: 1,alpha: 0.1)
let angleInRadians = -135 / 180.0 * CGFloat.pi
let rotation = containerView.transform.rotated(by: angleInRadians)
containerView.transform = rotation
view.addSubview(containerView)
containerView.heightAnchor.constraint(equalToConstant: 180).isActive = true
containerView.widthAnchor.constraint(equalToConstant: 180).isActive = true
containerView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
containerView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
let stackView = UIStackView(arrangedSubviews: [dummyWiew,dummyWiew2])
stackView.distribution = .fillEqually
stackView.spacing = 20
stackView.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(stackView)
stackView.heightAnchor.constraint(equalToConstant: 80).isActive = true
stackView.widthAnchor.constraint(equalToConstant: 180).isActive = true
stackView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor).isActive = true
stackView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
containerView.addSubview(dummyWiew3)
dummyWiew3.bottomAnchor.constraint(equalTo: stackView.topAnchor,constant: -20).isActive = true
dummyWiew3.trailingAnchor.constraint(equalTo: stackView.trailingAnchor,constant: 0).isActive = true
dummyWiew3.leadingAnchor.constraint(equalTo: dummyWiew2.leadingAnchor).isActive = true
dummyWiew3.heightAnchor.constraint(equalToConstant: 80).isActive = true
这是结果
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