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Support smoother completion animation for panning velocity #18

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merged 2 commits into from
May 16, 2013
Merged

Support smoother completion animation for panning velocity #18

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394acbc
Smoother Automatic Pan Open/Closing using velocity
kcharwood May 16, 2013
d2f14ef
Made it more DRY
kcharwood May 16, 2013
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32 changes: 22 additions & 10 deletions MMDrawerController/MMDrawerController.m
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@

CGFloat const MMDrawerBezelRange = 20.0f;

CGFloat const MMDrawerPanVelocityXAnimationThreshold = 100.0f;
CGFloat const MMDrawerPanVelocityXAnimationThreshold = 200.0f;

/** The amount of overshoot that is panned linearly. The remaining percentage nonlinearly asymptotes to the max percentage. */
CGFloat const MMDrawerOvershootLinearRangePercentage = 0.75f;
Expand Down Expand Up @@ -181,10 +181,14 @@ -(void)toggleDrawerSide:(MMDrawerSide)drawerSide animated:(BOOL)animated complet
}

-(void)closeDrawerAnimated:(BOOL)animated completion:(void (^)(BOOL))completion{
[self closeDrawerAnimated:animated velocity:self.animationVelocity animationOptions:UIViewAnimationOptionCurveEaseInOut completion:completion];
}

-(void)closeDrawerAnimated:(BOOL)animated velocity:(CGFloat)velocity animationOptions:(UIViewAnimationOptions)options completion:(void (^)(BOOL))completion{
CGRect newFrame = self.view.bounds;

CGFloat distance = ABS(CGRectGetMinX(self.centerContainerView.frame));
NSTimeInterval duration = [self animationDurationForAnimationDistance:distance];
NSTimeInterval duration = MAX(distance/ABS(velocity),MMDrawerMinimumAnimationDuration);

BOOL leftDrawerVisible = CGRectGetMinX(self.centerContainerView.frame) > 0;
BOOL rightDrawerVisible = CGRectGetMinX(self.centerContainerView.frame) < 0;
Expand Down Expand Up @@ -212,14 +216,14 @@ -(void)closeDrawerAnimated:(BOOL)animated completion:(void (^)(BOOL))completion{
[UIView
animateWithDuration:(animated?duration:0.0)
delay:0.0
options:UIViewAnimationOptionCurveEaseInOut
options:options
animations:^{
[self.centerContainerView setFrame:newFrame];
[self updateDrawerVisualStateForDrawerSide:visibleSide percentVisible:0.0];
}
completion:^(BOOL finished) {
[sideDrawerViewController endAppearanceTransition];
[self setOpenSide:MMDrawerSideNone];
[self setOpenSide:MMDrawerSideNone];
[self resetDrawerVisualStateForDrawerSide:visibleSide];

if(completion){
Expand All @@ -231,6 +235,12 @@ -(void)closeDrawerAnimated:(BOOL)animated completion:(void (^)(BOOL))completion{
-(void)openDrawerSide:(MMDrawerSide)drawerSide animated:(BOOL)animated completion:(void (^)(BOOL))completion{
NSParameterAssert(drawerSide != MMDrawerSideNone);

[self openDrawerSide:drawerSide animated:animated velocity:self.animationVelocity animationOptions:UIViewAnimationOptionCurveEaseInOut completion:completion];
}

-(void)openDrawerSide:(MMDrawerSide)drawerSide animated:(BOOL)animated velocity:(CGFloat)velocity animationOptions:(UIViewAnimationOptions)options completion:(void (^)(BOOL))completion{
NSParameterAssert(drawerSide != MMDrawerSideNone);

UIViewController * sideDrawerViewController = [self sideDrawerViewControllerForSide:drawerSide];
CGRect visibleRect = CGRectIntersection(self.view.bounds,sideDrawerViewController.view.frame);
BOOL drawerFullyCovered = (CGRectContainsRect(self.centerContainerView.frame, visibleRect) ||
Expand All @@ -252,12 +262,12 @@ -(void)openDrawerSide:(MMDrawerSide)drawerSide animated:(BOOL)animated completio
}

CGFloat distance = ABS(CGRectGetMinX(oldFrame)-newFrame.origin.x);
NSTimeInterval duration = [self animationDurationForAnimationDistance:distance];
NSTimeInterval duration = MAX(distance/ABS(velocity),MMDrawerMinimumAnimationDuration);

[UIView
animateWithDuration:(animated?duration:0.0)
delay:0.0
options:UIViewAnimationOptionCurveEaseInOut
options:options
animations:^{
[self.centerContainerView setFrame:newFrame];
[self updateDrawerVisualStateForDrawerSide:drawerSide percentVisible:1.0];
Expand Down Expand Up @@ -789,13 +799,15 @@ -(void)panGesture:(UIPanGestureRecognizer *)panGesture{
-(void)finishAnimationForPanGestureWithXVelocity:(CGFloat)xVelocity completion:(void(^)(BOOL finished))completion{
CGFloat currentOriginX = CGRectGetMinX(self.centerContainerView.frame);

CGFloat animationVelocity = MAX(ABS(xVelocity),MMDrawerPanVelocityXAnimationThreshold*2);

if(self.openSide == MMDrawerSideLeft) {
CGFloat midPoint = self.maximumLeftDrawerWidth / 2.0;
if(xVelocity > MMDrawerPanVelocityXAnimationThreshold){
[self openDrawerSide:MMDrawerSideLeft animated:YES completion:completion];
[self openDrawerSide:MMDrawerSideLeft animated:YES velocity:animationVelocity animationOptions:UIViewAnimationOptionCurveEaseOut completion:completion];
}
else if(xVelocity < -MMDrawerPanVelocityXAnimationThreshold){
[self closeDrawerAnimated:YES completion:completion];
[self closeDrawerAnimated:YES velocity:animationVelocity animationOptions:UIViewAnimationOptionCurveEaseOut completion:completion];
}
else if(currentOriginX < midPoint){
[self closeDrawerAnimated:YES completion:completion];
Expand All @@ -808,10 +820,10 @@ -(void)finishAnimationForPanGestureWithXVelocity:(CGFloat)xVelocity completion:(
currentOriginX = CGRectGetMaxX(self.centerContainerView.frame);
CGFloat midPoint = (CGRectGetWidth(self.view.bounds)-self.maximumRightDrawerWidth) + (self.maximumRightDrawerWidth / 2.0);
if(xVelocity > MMDrawerPanVelocityXAnimationThreshold){
[self closeDrawerAnimated:YES completion:completion];
[self closeDrawerAnimated:YES velocity:animationVelocity animationOptions:UIViewAnimationOptionCurveEaseOut completion:completion];
}
else if (xVelocity < -MMDrawerPanVelocityXAnimationThreshold){
[self openDrawerSide:MMDrawerSideRight animated:YES completion:completion];
[self openDrawerSide:MMDrawerSideRight animated:YES velocity:animationVelocity animationOptions:UIViewAnimationOptionCurveEaseOut completion:completion];
}
else if(currentOriginX > midPoint){
[self closeDrawerAnimated:YES completion:completion];
Expand Down