Add a public API for setting animation's duration

RoundProgress/CERoundProgressView.h

@@ -16,5 +16,6 @@
 @property (nonatomic, assign) float startAngle; // 0..2π 
 @property (nonatomic, retain) UIColor *tintColor UI_APPEARANCE_SELECTOR;
 @property (nonatomic, retain) UIColor *trackColor UI_APPEARANCE_SELECTOR;
+@property (nonatomic, assign) float animationDuration; // greater than 0 (in seconds); default value: 0.25
 
 @end

RoundProgress/CERoundProgressView.m

@@ -17,6 +17,8 @@
 
 @implementation CERoundProgressView
 
+@synthesize animationDuration = _animationDuration;
+
 + (Class) layerClass
 {
     return [CERoundProgressLayer class];
@@ -79,7 +81,7 @@
     if(animated)
     {
         CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"progress"];
-        animation.duration = 0.25;
+        animation.duration = self.animationDuration;
         animation.fromValue = [NSNumber numberWithFloat:layer.progress];
         animation.toValue = [NSNumber numberWithFloat:progress];
         [layer addAnimation:animation forKey:@"progressAnimation"];
@@ -93,6 +95,23 @@
     }
 }
 
+#define DEFAULT_ANIMATION_DURATION 0.25
+
+- (float)animationDuration
+{
+    if (!_animationDuration) {
+        _animationDuration = DEFAULT_ANIMATION_DURATION;
+    }
+    return _animationDuration;
+}
+
+- (void)setAnimationDuration:(float)animationDuration
+{
+    if (animationDuration > 0) {
+        _animationDuration = animationDuration;
+    }
+}
+
 - (UIColor *)tintColor
 {
     CERoundProgressLayer *layer = (CERoundProgressLayer *)self.layer;