Added the iOS 8 margin attributes

@@ -127,6 +127,20 @@
 - (MASConstraint *)centerY;
 - (MASConstraint *)baseline;
 
+#if TARGET_OS_IPHONE
+
+- (MASConstraint *)leftMargin;
+- (MASConstraint *)rightMargin;
+- (MASConstraint *)topMargin;
+- (MASConstraint *)bottomMargin;
+- (MASConstraint *)leadingMargin;
+- (MASConstraint *)trailingMargin;
+- (MASConstraint *)centerXWithinMargins;
+- (MASConstraint *)centerYWithinMargins;
+
+#endif
+
+
 /**
  *	Sets the constraint debug name
  */

@@ -208,6 +208,42 @@
     return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
 }
 
+#if TARGET_OS_IPHONE
+
+- (MASConstraint *)leftMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASConstraint *)rightMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASConstraint *)topMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASConstraint *)bottomMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASConstraint *)leadingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASConstraint *)trailingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASConstraint *)centerXWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASConstraint *)centerYWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
 #pragma mark - Abstract
 
 - (MASConstraint * (^)(CGFloat multiplier))multipliedBy { MASMethodNotImplemented(); }

@@ -21,6 +21,20 @@ typedef NS_OPTIONS(NSInteger, MASAttribute) {
     MASAttributeCenterX = 1 << NSLayoutAttributeCenterX,
     MASAttributeCenterY = 1 << NSLayoutAttributeCenterY,
     MASAttributeBaseline = 1 << NSLayoutAttributeBaseline,
+    
+#if TARGET_OS_IPHONE
+    
+    MASAttributeLeftMargin = 1 << NSLayoutAttributeLeftMargin,
+    MASAttributeRightMargin = 1 << NSLayoutAttributeRightMargin,
+    MASAttributeTopMargin = 1 << NSLayoutAttributeTopMargin,
+    MASAttributeBottomMargin = 1 << NSLayoutAttributeBottomMargin,
+    MASAttributeLeadingMargin = 1 << NSLayoutAttributeLeadingMargin,
+    MASAttributeTrailingMargin = 1 << NSLayoutAttributeTrailingMargin,
+    MASAttributeCenterXWithinMargins = 1 << NSLayoutAttributeCenterXWithinMargins,
+    MASAttributeCenterYWithinMargins = 1 << NSLayoutAttributeCenterYWithinMargins,
+
+#endif
+    
 };
 
 /**
@@ -46,6 +60,19 @@ typedef NS_OPTIONS(NSInteger, MASAttribute) {
 @property (nonatomic, strong, readonly) MASConstraint *centerY;
 @property (nonatomic, strong, readonly) MASConstraint *baseline;
 
+#if TARGET_OS_IPHONE
+
+@property (nonatomic, strong, readonly) MASConstraint *leftMargin;
+@property (nonatomic, strong, readonly) MASConstraint *rightMargin;
+@property (nonatomic, strong, readonly) MASConstraint *topMargin;
+@property (nonatomic, strong, readonly) MASConstraint *bottomMargin;
+@property (nonatomic, strong, readonly) MASConstraint *leadingMargin;
+@property (nonatomic, strong, readonly) MASConstraint *trailingMargin;
+@property (nonatomic, strong, readonly) MASConstraint *centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASConstraint *centerYWithinMargins;
+
+#endif
+
 /**
  *  Returns a block which creates a new MASCompositeConstraint with the first item set
  *  to the makers associated view and children corresponding to the set bits in the

@@ -75,7 +75,15 @@
 }
 
 - (MASConstraint *)addConstraintWithAttributes:(MASAttribute)attrs {
-    __unused MASAttribute anyAttribute = MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading | MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX | MASAttributeCenterY | MASAttributeBaseline;
+    __unused MASAttribute anyAttribute = (MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading
+                                          | MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX
+                                          | MASAttributeCenterY | MASAttributeBaseline
+#if TARGET_OS_IPHONE
+                                          | MASAttributeLeftMargin | MASAttributeRightMargin | MASAttributeTopMargin | MASAttributeBottomMargin
+                                          | MASAttributeLeadingMargin | MASAttributeTrailingMargin | MASAttributeCenterXWithinMargins
+                                          | MASAttributeCenterYWithinMargins
+#endif
+                                          );
     
     NSAssert((attrs & anyAttribute) != 0, @"You didn't pass any attribute to make.attributes(...)");
     
@@ -93,6 +101,19 @@
     if (attrs & MASAttributeCenterY) [attributes addObject:self.view.mas_centerY];
     if (attrs & MASAttributeBaseline) [attributes addObject:self.view.mas_baseline];
     
+#if TARGET_OS_IPHONE
+    
+    if (attrs & MASAttributeLeftMargin) [attributes addObject:self.view.mas_leftMargin];
+    if (attrs & MASAttributeRightMargin) [attributes addObject:self.view.mas_rightMargin];
+    if (attrs & MASAttributeTopMargin) [attributes addObject:self.view.mas_topMargin];
+    if (attrs & MASAttributeBottomMargin) [attributes addObject:self.view.mas_bottomMargin];
+    if (attrs & MASAttributeLeadingMargin) [attributes addObject:self.view.mas_leadingMargin];
+    if (attrs & MASAttributeTrailingMargin) [attributes addObject:self.view.mas_trailingMargin];
+    if (attrs & MASAttributeCenterXWithinMargins) [attributes addObject:self.view.mas_centerXWithinMargins];
+    if (attrs & MASAttributeCenterYWithinMargins) [attributes addObject:self.view.mas_centerYWithinMargins];
+    
+#endif
+    
     NSMutableArray *children = [NSMutableArray arrayWithCapacity:attributes.count];
     
     for (MASViewAttribute *a in attributes) {
@@ -161,6 +182,42 @@
     };
 }
 
+#if TARGET_OS_IPHONE
+
+- (MASConstraint *)leftMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASConstraint *)rightMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASConstraint *)topMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASConstraint *)bottomMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASConstraint *)leadingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASConstraint *)trailingMargin {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASConstraint *)centerXWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASConstraint *)centerYWithinMargins {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
 
 #pragma mark - composite Attributes
 

@@ -43,6 +43,18 @@
             @(NSLayoutAttributeCenterX)  : @"centerX",
             @(NSLayoutAttributeCenterY)  : @"centerY",
             @(NSLayoutAttributeBaseline) : @"baseline",
+            
+#if TARGET_OS_IPHONE
+            @(NSLayoutAttributeLeftMargin)           : @"leftMargin",
+            @(NSLayoutAttributeRightMargin)          : @"rightMargin",
+            @(NSLayoutAttributeTopMargin)            : @"topMargin",
+            @(NSLayoutAttributeBottomMargin)         : @"bottomMargin",
+            @(NSLayoutAttributeLeadingMargin)        : @"leadingMargin",
+            @(NSLayoutAttributeTrailingMargin)       : @"trailingMargin",
+            @(NSLayoutAttributeCenterXWithinMargins) : @"centerXWithinMargins",
+            @(NSLayoutAttributeCenterYWithinMargins) : @"centerYWithinMargins",
+#endif
+            
         };
     
     });

@@ -32,6 +32,19 @@
 @property (nonatomic, strong, readonly) MASViewAttribute *mas_baseline;
 @property (nonatomic, strong, readonly) MASViewAttribute *(^mas_attribute)(NSLayoutAttribute attr);
 
+#if TARGET_OS_IPHONE
+
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_leftMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_rightMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_topMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_bottomMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_leadingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_trailingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_centerYWithinMargins;
+
+#endif
+
 /**
  *	a key to associate with this view
  */

@@ -87,6 +87,42 @@
     };
 }
 
+#if TARGET_OS_IPHONE
+
+- (MASViewAttribute *)mas_leftMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeftMargin];
+}
+
+- (MASViewAttribute *)mas_rightMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeRightMargin];
+}
+
+- (MASViewAttribute *)mas_topMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTopMargin];
+}
+
+- (MASViewAttribute *)mas_bottomMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeBottomMargin];
+}
+
+- (MASViewAttribute *)mas_leadingMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLeadingMargin];
+}
+
+- (MASViewAttribute *)mas_trailingMargin {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeTrailingMargin];
+}
+
+- (MASViewAttribute *)mas_centerXWithinMargins {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterXWithinMargins];
+}
+
+- (MASViewAttribute *)mas_centerYWithinMargins {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeCenterYWithinMargins];
+}
+
+#endif
+
 #pragma mark - associated properties
 
 - (id)mas_key {

@@ -29,6 +29,19 @@
 @property (nonatomic, strong, readonly) MASViewAttribute *baseline;
 @property (nonatomic, strong, readonly) MASViewAttribute *(^attribute)(NSLayoutAttribute attr);
 
+#if TARGET_OS_IPHONE
+
+@property (nonatomic, strong, readonly) MASViewAttribute *leftMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *rightMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *topMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *bottomMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *leadingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *trailingMargin;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerXWithinMargins;
+@property (nonatomic, strong, readonly) MASViewAttribute *centerYWithinMargins;
+
+#endif
+
 - (NSArray *)makeConstraints:(void(^)(MASConstraintMaker *make))block;
 - (NSArray *)updateConstraints:(void(^)(MASConstraintMaker *make))block;
 - (NSArray *)remakeConstraints:(void(^)(MASConstraintMaker *make))block;
@@ -54,6 +67,19 @@ MAS_ATTR_FORWARD(centerX);
 MAS_ATTR_FORWARD(centerY);
 MAS_ATTR_FORWARD(baseline);
 
+#if TARGET_OS_IPHONE
+
+MAS_ATTR_FORWARD(leftMargin);
+MAS_ATTR_FORWARD(rightMargin);
+MAS_ATTR_FORWARD(topMargin);
+MAS_ATTR_FORWARD(bottomMargin);
+MAS_ATTR_FORWARD(leadingMargin);
+MAS_ATTR_FORWARD(trailingMargin);
+MAS_ATTR_FORWARD(centerXWithinMargins);
+MAS_ATTR_FORWARD(centerYWithinMargins);
+
+#endif
+
 - (MASViewAttribute *(^)(NSLayoutAttribute))attribute {
     return [self mas_attribute];
 }