UIView+AutoLayout.h

//
//  UIView+AutoLayout.h
//  CollectionTableGrid
//
//  Created by Richard Turton on 18/10/2012.
//  Copyright (c) 2012 Richard Turton. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef NS_OPTIONS(unsigned long, JRTViewPinEdges){
    JRTViewPinTopEdge = 1 << 0,
    JRTViewPinRightEdge = 1 << 1,
    JRTViewPinBottomEdge = 1 << 2,
    JRTViewPinLeftEdge = 1 << 3,
    JRTViewPinAllEdges = ~0UL
};

@interface UIView (AutoLayout)
/// Return a frameless view that does not automatically use autoresizing (for use in autolayouts)
+(id)autoLayoutView;

/// Centers the receiver in the superview
-(NSArray *)centerInView:(UIView*)superview;
-(NSLayoutConstraint *)centerInContainerOnAxis:(NSLayoutAttribute)axis;

/// Pin an attribute to the same attribute on another view. Both views must be in the same view hierarchy
-(NSLayoutConstraint *)pinAttribute:(NSLayoutAttribute)attribute toSameAttributeOfView:(UIView *)peerView;

/// Pin an attribute to the same attribute on another view along with a multiplier. Both views must be in the same view hierarchy
-(NSLayoutConstraint *)pinAttribute:(NSLayoutAttribute)attribute toSameAttributeOfView:(UIView *)peerView withMultiplier:(CGFloat)multiplier;

/// Pin an attribute to the same attribute on another view along with a constant. Both views must be in the same view hierarchy
-(NSLayoutConstraint *)pinAttribute:(NSLayoutAttribute)attribute toSameAttributeOfView:(UIView *)peerView withConstant:(CGFloat)constant;

/// Pins a view to a specific edge(s) of its superview, with a specified inset
-(NSArray*)pinToSuperviewEdges:(JRTViewPinEdges)edges inset:(CGFloat)inset;

/// Pins a view to all edges of its superview, with specified edge insets
-(NSArray*)pinToSuperviewEdgesWithInset:(UIEdgeInsets)insets;

/// Pins a view's edge to a peer view's edge. Both views must be in the same view hierarchy
-(NSLayoutConstraint *)pinEdge:(NSLayoutAttribute)edge toEdge:(NSLayoutAttribute)toEdge ofView:(UIView*)peerView;
-(NSLayoutConstraint *)pinEdge:(NSLayoutAttribute)edge toEdge:(NSLayoutAttribute)toEdge ofView:(UIView *)peerView inset:(CGFloat)inset;

/// Set to a specific size. 0 in any axis results in no constraint being applied.
-(NSArray *)constrainToSize:(CGSize)size;

/// Pins a point to a specific point in the superview's frame. Use NSLayoutAttributeNotAnAttribute to only pin in one dimension
-(void)pinPointAtX:(NSLayoutAttribute)x Y:(NSLayoutAttribute)y toPoint:(CGPoint)point;

/// Spaces the views evenly along the selected axis. Will force the views to the same size to make them fit
-(void)spaceViews:(NSArray*)views onAxis:(UILayoutConstraintAxis)axis withSpacing:(CGFloat)spacing alignmentOptions:(NSLayoutFormatOptions)options;

/// Spaces the views evenly along the selected axis. Will force the views to the same size to make them fit within the view and inset.
-(void)spaceViews:(NSArray*)views onAxis:(UILayoutConstraintAxis)axis withSpacing:(CGFloat)spacing withInset:(CGFloat)inset alignmentOptions:(NSLayoutFormatOptions)options;
@end