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如何在swift中设置UIButton的高度锚?

autolayout swift

oddK · 技术社区 · 4 年前

我只使用代码来配置视图。
所有视图都将translatesAutoresizingMaskIntoConstraints属性更改为false。
但它并没有按照我想要的方式工作。
高度锚 disagreeButton 很奇怪。

contentView.addSubviews(datePickerView, dateSelectButton, triangleImageView, descriptionLabel, agreeButton, disagreeButton)

datePickerViewHeight = datePickerView.heightAnchor.constraint(equalToConstant: 0)
dateSelectButtonHeight = dateSelectButton.heightAnchor.constraint(equalToConstant: 36)

NSLayoutConstraint.activate([
            datePickerView.topAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.topAnchor),
            datePickerView.leadingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.leadingAnchor),
            datePickerView.trailingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.trailingAnchor),
            datePickerViewHeight ?? NSLayoutConstraint(),

            dateSelectButton.topAnchor.constraint(equalTo: datePickerView.bottomAnchor),
            dateSelectButton.widthAnchor.constraint(equalToConstant: 76),
            dateSelectButton.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),
            dateSelectButtonHeight ?? NSLayoutConstraint(),

            triangleImageView.widthAnchor.constraint(equalToConstant: 14),
            triangleImageView.heightAnchor.constraint(equalToConstant: 10),
            triangleImageView.leadingAnchor.constraint(equalTo: dateSelectButton.trailingAnchor, constant: 9),
            triangleImageView.centerYAnchor.constraint(equalTo: dateSelectButton.centerYAnchor),

            descriptionLabel.topAnchor.constraint(equalTo: dateSelectButton.bottomAnchor, constant: 16),
            descriptionLabel.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),

            agreeButton.topAnchor.constraint(equalTo: descriptionLabel.bottomAnchor, constant: 32),
            agreeButton.leadingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.leadingAnchor, constant: 24),
            agreeButton.trailingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.trailingAnchor, constant: -24),
            agreeButton.heightAnchor.constraint(equalToConstant: 58),

            disagreeButton.topAnchor.constraint(equalTo: agreeButton.bottomAnchor, constant: 12),
            disagreeButton.leadingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.leadingAnchor, constant: 24),
            disagreeButton.trailingAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.trailingAnchor, constant: -24),
            disagreeButton.heightAnchor.constraint(equalToConstant: 58),
            disagreeButton.bottomAnchor.constraint(equalTo: contentView.safeAreaLayoutGuide.bottomAnchor, constant: -50)
])

see storyboard debuging screen shot

我做错了什么?

0 回复 | 直到 4 年前

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