iOS7教程系列：自定义导航转场动画以及更多

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[UIView animateKeyframesWithDuration:duration delay:delay 
options:options animations:^{ 
[UIView addKeyframeWithRelativeStartTime:0.0 
relativeDuration:0.5 animations:^{ 
//第一帧要执行的动画 
}]; 
[UIView addKeyframeWithRelativeStartTime:0.5 
relativeDuration:0.5 animations:^{ 
//第二帧要执行的动画 
}]; 
} completion:^(BOOL finished) { 
//动画结束后执行的代码块 
}]; 

[UIView addKeyframeWithRelativeStartTime:0.0 
relativeDuration:0.15 animations:^{ 
//顺时针旋转90度 
snapshot.transform = CGAffineTransformMakeRotation(M_PI * 
-1.5); 
}]; 
[UIView addKeyframeWithRelativeStartTime:0.15 
relativeDuration:0.10 animations:^{ 
//180度 
snapshot.transform = CGAffineTransformMakeRotation(M_PI * 
1.0); 
}]; 
[UIView addKeyframeWithRelativeStartTime:0.25 
relativeDuration:0.20 animations:^{ 
//摆过中点，225度 
snapshot.transform = CGAffineTransformMakeRotation(M_PI * 
1.3); 
}]; 
[UIView addKeyframeWithRelativeStartTime:0.45 
relativeDuration:0.20 animations:^{ 
//再摆回来，140度 
snapshot.transform = CGAffineTransformMakeRotation(M_PI * 
0.8); 
}]; 
[UIView addKeyframeWithRelativeStartTime:0.65 
relativeDuration:0.35 animations:^{ 
//旋转后掉落 
//最后一步，视图淡出并消失 
CGAffineTransform shift = 
CGAffineTransformMakeTranslation(180.0, 0.0); 
CGAffineTransform rotate = 
CGAffineTransformMakeRotation(M_PI * 0.3); 
snapshot.transform = CGAffineTransformConcat(shift, 
rotate); 
_coverView.alpha = 0.0; 
}]; 

[UIView animateWithDuration:duration delay:delay 
usingSpringWithDamping:damping initialSpringVelocity:velocity 
options:options animations:^{ 
//这里书写动画相关代码 
} completion:^(BOOL finished) { 
//动画结束后执行的代码块 
}]; 

-(void)animateTransition: 
(id<UIViewControllerContextTransitioning>)transitionContext { 
//获取容器视图引用 
UIView *containerView = [transitionContext 
containerView]; 
UIViewController *fromViewController = [transitionContext 
viewControllerForKey:UITransitionContextFromViewControllerKey 
]; 
UIViewController *toViewController = [transitionContext 
viewControllerForKey:UITransitionContextToViewControllerKey]; 
if (self.type == AnimationTypePresent) { 
//插入“to”视图，初始缩放值为0.0 
toViewController.view.transform = 
CGAffineTransformMakeScale(0.0, 0.0); 
[containerView insertSubview:toViewController.view 
aboveSubview:fromViewController.view]; 
//缩放“to”视图为想要的效果 
[UIView animateWithDuration:[self 
transitionDuration:transitionContext] animations:^{ 
toViewController.view.transform = 
CGAffineTransformMakeScale(1.0, 1.0); 
} completion:^(BOOL finished) { 
[transitionContext completeTransition:YES]; 
}]; 
} else if (self.type == AnimationTypeDismiss) { 
//插入“to”视图 
[containerView insertSubview:toViewController.view 
belowSubview:fromViewController.view]; 
//缩小“from”视图，直到其消失 
[UIView animateWithDuration:[self 
transitionDuration:transitionContext] animations:^{ 
fromViewController.view.transform = 
CGAffineTransformMakeScale(0.0, 0.0); 
} completion:^(BOOL finished) { 
[transitionContext completeTransition:YES]; 
}]; 
} 
} 
-(NSTimeInterval)transitionDuration: 
(id<UIViewControllerContextTransitioning>)transitionContext { 
return 0.4; 
} 

-(id<UIViewControllerAnimatedTransitioning>) 
animationControllerForPresentedController:(UIViewController 
*)presented presentingController:(UIViewController 
*)presenting sourceController:(UIViewController *)source { 
modalAnimationController.type = AnimationTypePresent; 
return modalAnimationController; 
} 
-(id<UIViewControllerAnimatedTransitioning>) 
animationControllerForDismissedController:(UIViewController 
*)dismissed { 
modalAnimationController.type = AnimationTypeDismiss; 
return modalAnimationController; 
} 

OptionsViewController *modal = [[OptionsViewController alloc] 
initWithNibName:@"OptionsViewController" bundle:[NSBundle 
mainBundle]]; 
modal.transitioningDelegate = self; 
modal.modalPresentationStyle = UIModalPresentationCustom; 
[self presentViewController:modal animated:YES 
completion:nil]; 

@interface UIPercentDrivenInteractiveTransition : NSObject 
<UIViewControllerInteractiveTransitioning> 
@property (readonly) CGFloat duration; 
@property (readonly) CGFloat percentComplete; 
@property (nonatomic,assign) CGFloat completionSpeed; 
@property (nonatomic,assign) UIViewAnimationCurve 
completionCurve; 
- (void)updateInteractiveTransition:(CGFloat)percentComplete; 
- (void)cancelInteractiveTransition; 
- (void)finishInteractiveTransition; 

-(void)handlePinch:(UIPinchGestureRecognizer *)pinch { 
CGFloat scale = pinch.scale; 
switch (pinch.state) { 
case UIGestureRecognizerStateBegan: { 
_startScale = scale; 
self.interactive = YES; 
[self.navigationController 
popViewControllerAnimated:YES]; 
break; 
} 
case UIGestureRecognizerStateChanged: { 
CGFloat percent = (1.0 - scale/_startScale); 
[self updateInteractiveTransition:(percent < 0.0) ? 
0.0 : percent]; 
break; 
} 
case UIGestureRecognizerStateEnded: { 
CGFloat percent = (1.0 - scale/_startScale); 
BOOL cancelled = ([pinch velocity] < 5.0 && percent 
<= 0.3); 
if (cancelled) [self cancelInteractiveTransition]; 
else [self finishInteractiveTransition]; 
break; 
} 
case UIGestureRecognizerStateCancelled: { 
CGFloat percent = (1.0 - scale/_startScale); 
BOOL cancelled = ([pinch velocity] < 5.0 && percent 
<= 0.3); 
if (cancelled) [self cancelInteractiveTransition]; 
else [self finishInteractiveTransition]; 
break; 
} 
} 
} 

-(void)startInteractiveTransition: 
(id<UIViewControllerContextTransitioning>)transitionContext { 
//获取transitionContext对象的引用 
_context = transitionContext; 
//获取容器视图引用 
UIView *containerView = [transitionContext 
containerView]; 
UIViewController *fromViewController = [transitionContext 
viewControllerForKey:UITransitionContextFromViewControllerKey 
]; 
UIViewController *toViewController = [transitionContext 
viewControllerForKey:UITransitionContextToViewControllerKey]; 
//插入“to”视图 
toViewController.view.frame = [transitionContext 
finalFrameForViewController:toViewController]; 
[containerView insertSubview:toViewController.view 
belowSubview:fromViewController.view]; 
//保留需要缩?小的视图的引用 
_transitioningView = fromViewController.view; 
} 
-(void)updateWithPercent:(CGFloat)percent { 
CGFloat scale = fabsf(percent-1.0); 
_transitioningView.transform = 
CGAffineTransformMakeScale(scale, scale); 
[_context updateInteractiveTransition:percent]; 
} 
-(void)end:(BOOL)cancelled { 
if (cancelled) { 
[UIView animateWithDuration:_completionSpeed 
animations:^{ 
_transitioningView.transform = 
CGAffineTransformMakeScale(1.0, 1.0); 
} completion:^(BOOL finished) { 
[_context cancelInteractiveTransition]; 
[_context completeTransition:NO]; 
}]; 
} else { 
[UIView animateWithDuration:_completionSpeed 
animations:^{ 
_transitioningView.transform = 
CGAffineTransformMakeScale(0.0, 0.0); 
} completion:^(BOOL finished) { 
[_context finishInteractiveTransition]; 
[_context completeTransition:YES]; 
}]; 
} 
} 

[UIView performWithoutAnimation:^{ 
//确保不执行动画 
}]; 

CollectionViewController *VC = [[CollectionViewController 
alloc] initWithCollectionViewLayout:flowLayout]; 
VC.title = @"Mini Apples"; 
VC.useLayoutToLayoutNavigationTransitions = YES; 
[self.navigationController pushViewController:VC 
animated:YES]; 

[self.transitionCoordinator 
animateAlongsideTransition:^(id<UIViewControllerTransitionCoo 
rdinatorContext> context) { 
//要执行的动画 
} 
completion:^(id<UIViewControllerTransitionCoordinatorContext> 
context) { 
//动画结束后执行的代码块 
}]; 

[self.transitionCoordinator 
notifyWhenInteractionEndsUsingBlock:^(id<UIViewControllerTran 
sitionCoordinatorContext> context) { 
//动画结束后执?行的代码块 
}]; 

[view snapshotViewAfterScreenUpdates:NO]; 

[view snapshotViewAfterScreenUpdates:YES]; 
[view setAlpha:0.0]; 

/cms/uploads/soft/131224/4673-131224114628.zip