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added helpers methods to layoutconstrainable

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Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
This commit is contained in:
Matt Bruce 2024-06-27 09:48:52 -05:00
parent 742bae9169
commit 5fcc59d8af
1 changed files with 124 additions and 0 deletions
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124
VDS/Protocols/LayoutConstraintable.swift
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@ -631,6 +631,130 @@ extension LayoutConstraintable {
return centerYAnchor.constraint(greaterThanOrEqualTo: found, constant: -constant).with { $0.priority = priority; $0.isActive = true }
}
}
// alignment
public enum LayoutAlignment: String, CaseIterable {
case fill
case leading
case top
case center
case trailing
case bottom
}
public enum LayoutDistribution: String, CaseIterable {
case fill
case fillProportionally
}
extension LayoutConstraintable {
public func removeConstraints() {
guard let view = self as? UIView, let superview = view.superview else { return }
// Remove all existing constraints on the containerView
let superviewConstraints = superview.constraints
for constraint in superviewConstraints {
if constraint.firstItem as? UIView == view
|| constraint.secondItem as? UIView == view {
superview.removeConstraint(constraint)
}
}
}
public func applyAlignment(_ alignment: LayoutAlignment, edges: UIEdgeInsets = UIEdgeInsets.zero) {
guard let superview = superview else { return }
removeConstraints()
switch alignment {
case .fill:
pinToSuperView(edges)
case .leading:
pinTop(edges.top)
pinLeading(edges.left)
pinTrailingLessThanOrEqualTo(anchor: superview.trailingAnchor, constant: edges.right)
pinBottom(edges.bottom)
case .trailing:
pinTop(edges.top)
pinLeadingGreaterThanOrEqualTo(anchor: superview.leadingAnchor, constant: edges.left)
pinTrailing(edges.right)
pinBottom(edges.bottom)
case .top:
pinTop(edges.top)
pinLeadingGreaterThanOrEqualTo(anchor: superview.leadingAnchor, constant: edges.left)
pinTrailingLessThanOrEqualTo(anchor: superview.trailingAnchor, constant: edges.right)
pinBottomLessThanOrEqualTo(anchor: superview.bottomAnchor, constant: edges.bottom)
case .bottom:
pinTopGreaterThanOrEqualTo(anchor: superview.topAnchor, constant: edges.top)
pinLeadingGreaterThanOrEqualTo(anchor: superview.leadingAnchor, constant: edges.left)
pinTrailingLessThanOrEqualTo(anchor: superview.trailingAnchor, constant: edges.right)
pinBottom(edges.bottom)
case .center:
pinCenterX()
pinTop(edges.top)
pinLeadingGreaterThanOrEqualTo(anchor: superview.leadingAnchor, constant: edges.left)
pinTrailingLessThanOrEqualTo(anchor: superview.trailingAnchor, constant: edges.right)
pinBottom(edges.bottom)
}
}
// Method to check if the view is pinned to its superview
public func isPinnedToSuperview() -> Bool {
isPinnedVerticallyToSuperview() && isPinnedHorizontallyToSuperview()
}
public func isPinnedHorizontallyToSuperview() -> Bool {
guard let view = self as? UIView, let superview = view.superview else { return false }
let constraints = superview.constraints
var leadingPinned = false
var trailingPinned = false
for constraint in constraints {
if (constraint.firstItem as? UIView == view && constraint.firstAttribute == .leading && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .leading && constraint.relation == .equal && constraint.firstItem as? UIView == superview) ||
(constraint.firstItem as? UIView == view && constraint.firstAttribute == .left && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .left && constraint.relation == .equal && constraint.firstItem as? UIView == superview) {
leadingPinned = true
}
if (constraint.firstItem as? UIView == view && constraint.firstAttribute == .trailing && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .trailing && constraint.relation == .equal && constraint.firstItem as? UIView == superview) ||
(constraint.firstItem as? UIView == view && constraint.firstAttribute == .right && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .right && constraint.relation == .equal && constraint.firstItem as? UIView == superview) {
trailingPinned = true
}
}
return leadingPinned && trailingPinned
}
public func isPinnedVerticallyToSuperview() -> Bool {
guard let view = self as? UIView, let superview = view.superview else { return false }
let constraints = superview.constraints
var topPinned = false
var bottomPinned = false
for constraint in constraints {
if (constraint.firstItem as? UIView == view && constraint.firstAttribute == .top && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .top && constraint.relation == .equal && constraint.firstItem as? UIView == superview) {
topPinned = true
}
if (constraint.firstItem as? UIView == view && constraint.firstAttribute == .bottom && constraint.relation == .equal && constraint.secondItem as? UIView == superview) ||
(constraint.secondItem as? UIView == view && constraint.secondAttribute == .bottom && constraint.relation == .equal && constraint.firstItem as? UIView == superview) {
bottomPinned = true
}
}
return topPinned && bottomPinned
}
}
//--------------------------------------------------
// MARK: - Implementations
//--------------------------------------------------