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August 29, 2015 14:15
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Use Cartography to layout equally spaced views
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| func pairs<C: CollectionType>(source: C, block: (C.Generator.Element, C.Generator.Element) -> ()) { | |
| var last: C.Generator.Element? | |
| for i in source { | |
| if let l = last { | |
| block(l, i) | |
| } | |
| last = i | |
| } | |
| } | |
| func distributeHorizontallyWithEqualSpacing(views: UIView...) { | |
| let spacers = (1..<views.count).map { _ in UIView() } | |
| for v in spacers { views.first!.superview!.addSubview(v) } | |
| // I'm sure there's a functional programming function just for this... | |
| var spacersAndViews = [UIView]() | |
| for i in 0..<(views.count + spacers.count) { | |
| if i % 2 == 0 { spacersAndViews += [views[i/2]] } | |
| else { spacersAndViews += [spacers[(i-1)/2]] } | |
| } | |
| constrain(spacersAndViews) { views in | |
| pairs(views) { $0.right == $1.left; return } | |
| } | |
| constrain(spacers) { views in | |
| pairs(views) { $0.width == $1.width; return } | |
| for v in views { | |
| v.height == 1 | |
| v.top == v.superview!.top | |
| } | |
| } | |
| } |
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Unfortunately, Xcode wouldn't let me test this because it was crashing every 2 minutes and wouldn't compile not even a single line of Swift code. If anything doesn't work, feel free to leave a comment here.