// Creating constraints using Visual Format Language: from iOS 6.0
let views : [String : AnyObject] = ["leftTopLabel": leftTopLabel,"topEdgesLabel": topEdgesLabel]
var allConstraints = [NSLayoutConstraint]()
let constraint1 = NSLayoutConstraint.constraintsWithVisualFormat("H:[leftTopLabel]-(<=\(30))-[topEdgesLabel]", options: NSLayoutFormatOptions.AlignAllTop, metrics: nil, views: views)
allConstraints += constraint1
NSLayoutConstraint.activateConstraints(allConstraints)