使用SnapKit实现宽高比和小尺寸
使用SnapKit实现宽高比和小尺寸
提问于 2019-09-12 01:46:13
我正尝试在SnapKit中创建此布局的约束，但在设置最大尺寸(lessThanOrEqual)时遇到了困难。
let maxWidthContainer: CGFloat = 435
let maxHeightContainer: CGFloat = 600
containerView.snp.makeConstraints {
$0.width.equalTo(containerView.snp.height).multipliedBy(maxWidthContainer / maxHeightContainer)
$0.centerX.centerY.equalToSuperview()
$0.leading.trailing.equalToSuperview().inset(38).priorityLow()
}回答 1
Stack Overflow用户
回答已采纳
发布于 2019-09-12 03:55:56
如果我理解你想要什么，这应该可以做到：
let v = UIView()
v.backgroundColor = .blue
view.addSubview(v)
let maxWidthContainer: CGFloat = 435
let maxHeightContainer: CGFloat = 600
v.snp.makeConstraints { (make) in
// centered X and Y
make.centerX.centerY.equalToSuperview()
// at least 38 points "padding" on all 4 sides
// leading and top >= 38
make.leading.top.greaterThanOrEqualTo(38)
// trailing and bottom <= 38
make.trailing.bottom.lessThanOrEqualTo(38)
// width ratio to height
make.width.equalTo(v.snp.height).multipliedBy(maxWidthContainer/maxHeightContainer)
// width and height equal to superview width and height with high priority (but not required)
// this will make it as tall and wide as possible, until it violates another constraint
make.width.height.equalToSuperview().priority(.high)
// max height
make.height.lessThanOrEqualTo(maxHeightContainer)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/57894335
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