Snapkit和UILabel旋转

Question

我有：

1. UIView (集装箱)
2. UIView。下面图片中(1) -深蓝色的子视图
3. UIView。下图中(1) -紫色的子视图
4. UILabel。edges.equalToSuperview()

我想要做的是：

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问题是，我想让UILabel旋转3pi/2 (270°)。一旦我做了旋转，它的位置就不正确了。

设置edges.equalToSuperview()和270°旋转是这样的：

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我试过这个(但它会导致崩溃)：

myLabel.makeConstraints { make in
    make.top.equalTo(containerView.snp.left)
    make.right.equalTo(containerView.snp.top)
    make.left.equalTo(containerView.snp.bottom)
    make.bottom.equalTo(containerView.snp.right)
}

坠机描述：

*** Terminating app due to uncaught exception 'NSInvalidLayoutConstraintException', reason: 'Constraint improperly relates anchors of incompatible types: <SnapKit.LayoutConstraint:0x6100000ad8c0@MyClass.swift#250 MyProject.MyLabel:0x7fcc2201ca80.top == UIView:0x7fcc2201bd30.left>'

我能在这里做些什么？

Answer 1

对于任何对麋鹿克隆人的答案感兴趣的人，请使用Snapkit：

myLabel.snp.makeConstraints { make in
    make.centerX.equalTo(containerView.snp.centerX)
    make.centerY.equalTo(containerView.snp.centerY)
}

Answer 2

我使用默认的自动收费表( autolayout )完成了它，我也非常喜欢它。:)

这里是函数.

func makeLabel() {
        //Creating stackview
        let stackView = UIStackView()
        view.addSubview(stackView)
        stackView.translatesAutoresizingMaskIntoConstraints = false
        stackView.alignment = .fill
        stackView.distribution = .fillEqually
        stackView.axis = .vertical

        //Creating blueView
        let blueView = UIView()
        blueView.backgroundColor = UIColor.darkGray
        blueView.translatesAutoresizingMaskIntoConstraints = false
        stackView.addArrangedSubview(blueView)
        blueView.widthAnchor.constraint(equalToConstant: 100).isActive = true

        //Creating purpleView
        let purpleView = UIView()
        purpleView.backgroundColor = UIColor.purple
        purpleView.translatesAutoresizingMaskIntoConstraints = false
        stackView.addArrangedSubview(purpleView)

        stackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0).isActive = true
        stackView.topAnchor.constraint(equalTo: view.topAnchor, constant: 0).isActive = true
        stackView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0).isActive = true

        //Creating rotated label
        let label = UILabel()
        view.addSubview(label)
        label.transform = CGAffineTransform.init(rotationAngle: -CGFloat.pi/2)
        label.textColor = UIColor.white
        label.text = "This is my Rotated Text"
        label.font = UIFont.systemFont(ofSize: 25)
        label.translatesAutoresizingMaskIntoConstraints = false
        label.centerXAnchor.constraint(equalTo: stackView.centerXAnchor, constant: 0).isActive = true
        label.centerYAnchor.constraint(equalTo: stackView.centerYAnchor, constant: 0).isActive = true


    }

，这是输出.

肖像：

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景观

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