Added first/last baseline support

@@ -46,6 +46,7 @@
 
         make.height.equalTo(redView.height);
         make.height.equalTo(blueView.height);
+        
     }];
 
     //with is semantic and option

@@ -45,7 +45,7 @@ static UIEdgeInsets const kPadding = {10, 10, 10, 10};
     }];
 
     [self.shortLabel makeConstraints:^(MASConstraintMaker *make) {
-        make.centerY.equalTo(self.longLabel.centerY);
+        make.firstBaseline.equalTo(self.longLabel.centerY);
         make.right.equalTo(self.right).insets(kPadding);
     }];
 

@@ -127,6 +127,13 @@
 - (MASConstraint *)centerY;
 - (MASConstraint *)baseline;
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline;
+- (MASConstraint *)lastBaseline;
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 - (MASConstraint *)leftMargin;

@@ -208,6 +208,17 @@
     return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
 }
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+- (MASConstraint *)lastBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 - (MASConstraint *)leftMargin {

@@ -22,6 +22,13 @@ typedef NS_OPTIONS(NSInteger, MASAttribute) {
     MASAttributeCenterY = 1 << NSLayoutAttributeCenterY,
     MASAttributeBaseline = 1 << NSLayoutAttributeBaseline,
     
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    
+    MASAttributeFirstBaseline = 1 << NSLayoutAttributeFirstBaseline,
+    MASAttributeLastBaseline = 1 << NSLayoutAttributeLastBaseline,
+    
+#endif
+    
 #if TARGET_OS_IPHONE || TARGET_OS_TV
     
     MASAttributeLeftMargin = 1 << NSLayoutAttributeLeftMargin,
@@ -60,6 +67,13 @@ typedef NS_OPTIONS(NSInteger, MASAttribute) {
 @property (nonatomic, strong, readonly) MASConstraint *centerY;
 @property (nonatomic, strong, readonly) MASConstraint *baseline;
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASConstraint *firstBaseline;
+@property (nonatomic, strong, readonly) MASConstraint *lastBaseline;
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 @property (nonatomic, strong, readonly) MASConstraint *leftMargin;

@@ -78,6 +78,9 @@
     __unused MASAttribute anyAttribute = (MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading
                                           | MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX
                                           | MASAttributeCenterY | MASAttributeBaseline
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+                                          | MASAttributeFirstBaseline | MASAttributeLastBaseline
+#endif
 #if TARGET_OS_IPHONE || TARGET_OS_TV
                                           | MASAttributeLeftMargin | MASAttributeRightMargin | MASAttributeTopMargin | MASAttributeBottomMargin
                                           | MASAttributeLeadingMargin | MASAttributeTrailingMargin | MASAttributeCenterXWithinMargins
@@ -101,6 +104,13 @@
     if (attrs & MASAttributeCenterY) [attributes addObject:self.view.mas_centerY];
     if (attrs & MASAttributeBaseline) [attributes addObject:self.view.mas_baseline];
     
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    
+    if (attrs & MASAttributeFirstBaseline) [attributes addObject:self.view.mas_firstBaseline];
+    if (attrs & MASAttributeLastBaseline) [attributes addObject:self.view.mas_lastBaseline];
+    
+#endif
+    
 #if TARGET_OS_IPHONE || TARGET_OS_TV
     
     if (attrs & MASAttributeLeftMargin) [attributes addObject:self.view.mas_leftMargin];
@@ -182,6 +192,19 @@
     };
 }
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASConstraint *)firstBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+
+- (MASConstraint *)lastBaseline {
+    return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 - (MASConstraint *)leftMargin {

@@ -44,6 +44,11 @@
             @(NSLayoutAttributeCenterY)  : @"centerY",
             @(NSLayoutAttributeBaseline) : @"baseline",
             
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+            @(NSLayoutAttributeFirstBaseline) : @"firstBaseline",
+            @(NSLayoutAttributeLastBaseline) : @"lastBaseline",
+#endif
+            
 #if TARGET_OS_IPHONE || TARGET_OS_TV
             @(NSLayoutAttributeLeftMargin)           : @"leftMargin",
             @(NSLayoutAttributeRightMargin)          : @"rightMargin",

@@ -32,6 +32,13 @@
 @property (nonatomic, strong, readonly) MASViewAttribute *mas_baseline;
 @property (nonatomic, strong, readonly) MASViewAttribute *(^mas_attribute)(NSLayoutAttribute attr);
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_firstBaseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *mas_lastBaseline;
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 @property (nonatomic, strong, readonly) MASViewAttribute *mas_leftMargin;

@@ -87,6 +87,17 @@
     };
 }
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+- (MASViewAttribute *)mas_firstBaseline {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeFirstBaseline];
+}
+- (MASViewAttribute *)mas_lastBaseline {
+    return [[MASViewAttribute alloc] initWithView:self layoutAttribute:NSLayoutAttributeLastBaseline];
+}
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 - (MASViewAttribute *)mas_leftMargin {

@@ -29,6 +29,13 @@
 @property (nonatomic, strong, readonly) MASViewAttribute *baseline;
 @property (nonatomic, strong, readonly) MASViewAttribute *(^attribute)(NSLayoutAttribute attr);
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+@property (nonatomic, strong, readonly) MASViewAttribute *firstBaseline;
+@property (nonatomic, strong, readonly) MASViewAttribute *lastBaseline;
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 @property (nonatomic, strong, readonly) MASViewAttribute *leftMargin;
@@ -67,6 +74,13 @@ MAS_ATTR_FORWARD(centerX);
 MAS_ATTR_FORWARD(centerY);
 MAS_ATTR_FORWARD(baseline);
 
+#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+
+MAS_ATTR_FORWARD(firstBaseline);
+MAS_ATTR_FORWARD(lastBaseline);
+
+#endif
+
 #if TARGET_OS_IPHONE || TARGET_OS_TV
 
 MAS_ATTR_FORWARD(leftMargin);