Add ability to customize corner radius of the lines for the BEMBoxTypeSquare box type

Author: morozkin

Classes/BEMCheckBox.h

@@ -82,6 +82,10 @@ typedef NS_ENUM(NSInteger, BEMAnimationType) {
  */
 @property (nonatomic) IBInspectable CGFloat lineWidth;
 
+/** The corner radius which is applied to the box when the boxType is BEMBoxTypeSquare. Default to 3.0.
+ */
+@property (nonatomic) IBInspectable CGFloat cornerRadius;
+
 /** The duration in seconds of the animation when the check box switches from on and off. Default to 0.5.
  */
 @property (nonatomic) IBInspectable CGFloat animationDuration;

Classes/BEMCheckBox.m

@@ -72,6 +72,7 @@ - (void)commonInit {
     _onCheckColor = [UIColor colorWithRed:0 green:122.0/255.0 blue:255/255 alpha:1];
     _tintColor = [UIColor lightGrayColor];
     _lineWidth = 2.0;
+    _cornerRadius = 3.0;
     _animationDuration = 0.5;
     _minimumTouchSize = CGSizeMake(44, 44);
     _onAnimationType = BEMAnimationTypeStroke;
@@ -87,6 +88,7 @@ - (void)commonInit {
 - (void)initPathManager {
     _pathManager = [BEMPathManager new];
     _pathManager.lineWidth = _lineWidth;
+    _pathManager.cornerRadius = _cornerRadius;
     _pathManager.boxType = _boxType;
 }
 
@@ -167,6 +169,12 @@ - (void)setLineWidth:(CGFloat)lineWidth {
     [self reload];
 }
 
+- (void)setCornerRadius:(CGFloat)cornerRadius {
+    _cornerRadius = cornerRadius;
+    _pathManager.cornerRadius = cornerRadius;
+    [self reload];
+}
+
 - (void)setOffAnimationType:(BEMAnimationType)offAnimationType {
     _offAnimationType = offAnimationType;
 }

Classes/BEMPathManager.h

@@ -22,6 +22,10 @@
  */
 @property (nonatomic) CGFloat lineWidth;
 
+/** The corner radius of the path when the boxType is BEMBoxTypeSquare.
+ */
+@property (nonatomic) CGFloat cornerRadius;
+
 /** The type of box.
  * Depending on the box type, paths may be created differently
  * @see BEMBoxType

Classes/BEMPathManager.m

@@ -16,7 +16,7 @@ - (UIBezierPath *)pathForBox {
     UIBezierPath* path;
     switch (self.boxType) {
         case BEMBoxTypeSquare:
-            path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, self.size, self.size) cornerRadius:3.0];
+            path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, self.size, self.size) cornerRadius:self.cornerRadius];
             [path applyTransform:CGAffineTransformRotate(CGAffineTransformIdentity, M_PI * 2.5)];
             [path applyTransform:CGAffineTransformMakeTranslation(self.size, 0)];
             break;