Concise Auto Layout macros

gistfile1.m

#define Left        NSLayoutAttributeLeft
#define Right       NSLayoutAttributeRight
#define Top         NSLayoutAttributeTop
#define Bottom      NSLayoutAttributeBottom
#define Leading     NSLayoutAttributeLeading
#define Trailing    NSLayoutAttributeTrailing
#define Width       NSLayoutAttributeWidth
#define Height      NSLayoutAttributeHeight
#define CenterX     NSLayoutAttributeCenterX
#define CenterY     NSLayoutAttributeCenterY
#define Baseline    NSLayoutAttributeBaseline

#define LessThanOrEqual     NSLayoutRelationLessThanOrEqual
#define Equal               NSLayoutRelationEqual
#define GreaterThanOrEqual  NSLayoutRelationGreaterThanOrEqual

#define Constraint(item1, attr1, rel, item2, attr2, con) [NSLayoutConstraint constraintWithItem:(item1) attribute:(attr1) relatedBy:(rel) toItem:(item2) attribute:(attr2) multiplier:1 constant:(con)]
#define VisualConstraints(format, ...) [NSLayoutConstraint constraintsWithVisualFormat:(format) options:0 metrics:nil views:_NSDictionaryOfVariableBindings(@"" # __VA_ARGS__, __VA_ARGS__, nil)]
#define VisualConstraintWithMetrics(format, theMetrics, ...) [NSLayoutConstraint constraintsWithVisualFormat:(format) options:0 metrics:(theMetrics) views:_NSDictionaryOfVariableBindings(@"" # __VA_ARGS__, __VA_ARGS__, nil)]
#define ConstantConstraint(item, attr, rel, con) Constraint((item), (attr), (rel), nil, NSLayoutAttributeNotAnAttribute, (con))

#define horizontallyFillSuperview ^(UIView *view, NSUInteger idx, BOOL *stop) {[view.superview addConstraints:VisualConstraints(@"|[view]|", view)];}