Add ability to synchronize multiple shimmers

Uberchord · May 7, 2015 · 08445aa · 08445aa
1 parent f4158b8
commit 08445aa
Show file tree

Hide file tree

Showing 3 changed files with 23 additions and 0 deletions.
diff --git a/FBShimmering/FBShimmering.h b/FBShimmering/FBShimmering.h
@@ -55,5 +55,11 @@ typedef NS_ENUM(NSInteger, FBShimmerDirection) {
  */
 @property (assign, nonatomic, readonly) CFTimeInterval shimmeringFadeTime;
 
+/**
+ @abstract The absolute CoreAnimation media time when the shimmer will begin.
+ @discussion Only valid after setting {@ref shimmering} to YES.
+ */
+@property (assign, nonatomic) CFTimeInterval shimmeringBeginTime;
+
 @end
 
diff --git a/FBShimmering/FBShimmeringLayer.m b/FBShimmering/FBShimmeringLayer.m
@@ -244,6 +244,22 @@ - (void)setShimmeringOpacity:(CGFloat)shimmeringOpacity
   }
 }
 
+- (CFTimeInterval)shimmeringBeginTime
+{
+  return [_maskLayer animationForKey:kFBShimmerSlideAnimationKey].beginTime;
+}
+
+- (void)setShimmeringBeginTime:(CFTimeInterval)beginTime
+{
+  CAAnimation *slideAnimation = [[_maskLayer animationForKey:kFBShimmerSlideAnimationKey] mutableCopy];
+  if (nil == slideAnimation) {
+    return;
+  }
+
+  slideAnimation.beginTime = beginTime;
+  [_maskLayer addAnimation:slideAnimation forKey:kFBShimmerSlideAnimationKey];
+}
+
 - (void)layoutSublayers
 {
   [super layoutSublayers];

diff --git a/FBShimmering/FBShimmeringView.m b/FBShimmering/FBShimmeringView.m
@@ -48,6 +48,7 @@ - (void)mutator (ctype)value { \
 LAYER_ACCESSOR(shimmeringFadeTime, CFTimeInterval)
 LAYER_RW_PROPERTY(shimmeringBeginFadeDuration, setShimmeringBeginFadeDuration:, CFTimeInterval)
 LAYER_RW_PROPERTY(shimmeringEndFadeDuration, setShimmeringEndFadeDuration:, CFTimeInterval)
+LAYER_RW_PROPERTY(shimmeringBeginTime, setShimmeringBeginTime:, CFTimeInterval)
 
 - (void)setContentView:(UIView *)contentView
 {