Use the vanilla Auto Layout API, just a little bit easier.
The primary focus of this package is to provide a result builder to enable creating layout constraints with a declarative syntax.
Example:
NSLayoutConstraint.activate {
someView.topAnchor.constraint(equalTo: otherView.topAnchor)
someView.leadingAnchor.constraint(equalTo: otherView.leadingAnchor)
someView.bottomAnchor.constraint(equalTo: otherView.bottomAnchor)
someView.trailingAnchor.constraint(equalTo: otherView.trailingAnchor)
}The result builder syntax allows other expressions to provide a concise, clean, and declarative API surface; no need for intermediate arrays or temporary variables to express complex constraint creation.
Example:
NSLayoutConstraint.activate {
for view in [someView, anotherView, thingView] {
view.leadingAnchor.constraint(equalTo: awesomeView.leadingAnchor)
view.trailingAnchor.constraint(equalTo: awesomeView.trailingAnchor)
}
someView.topAnchor.constraint(equalTo: awesomeView.topAnchor)
thingView.bottomAnchor.constraint(equalTo: awesomeView.bottomAnchor)
if someCondition {
anotherView.widthAnchor.constraint(equalTo: awesomeView.widthAnchor)
}
}Other conveniences provided by this package can simplify the creation of common constraints.
The previous example with these conveniences can be expressed as:
NSLayoutConstraint.activate {
for view in [someView, anotherView, thingView] {
Pin(edges: .horizontal, of: view, to: awesomeView)
}
Pin(edges: .top, of: someView, to: awesomeView)
Pin(edges: .bottom, of: thingView, to: awesomeView)
if someCondition {
Pin(dimension: .width, of: anotherView, to: awesomeView)
}
}