hip_constraintsWithVisualFormats.swift

/*
    self.view.addConstraints(NSLayoutConstraint.hip_constraintsWithVisualFormats(
        ["H:|[label]|", "V:|[label]|"], options: [], metrics: nil, views: ["label": label]))
*/

extension NSLayoutConstraint {
    class func hip_constraintsWithVisualFormats(
        formats: [String], options: NSLayoutFormatOptions, metrics: [String: AnyObject]?, views: [String: AnyObject])
        -> [NSLayoutConstraint]
    {
        var constraints: [NSLayoutConstraint] = []
        for format in formats {
            constraints += NSLayoutConstraint.constraintsWithVisualFormat(
                format, options: options, metrics: metrics, views: views)
        }
        return constraints
    }
}