315 lines
11 KiB
Objective-C
315 lines
11 KiB
Objective-C
//
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// HWPanModalPresentationAnimator.m
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// HWPanModal
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//
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// Created by heath wang on 2019/4/29.
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//
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#import "HWPanModalPresentationAnimator.h"
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#import "HWPanModalAnimator.h"
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#import "UIViewController+LayoutHelper.h"
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#import "HWPanContainerView.h"
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#import "UIView+HW_Frame.h"
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#import "HWPageSheetPresentingAnimation.h"
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#import "HWShoppingCartPresentingAnimation.h"
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@interface HWPresentingVCTransitionContext : NSObject <HWPresentingViewControllerContextTransitioning>
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@property (nonatomic, weak) UIViewController *fromVC;
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@property (nonatomic, weak) UIViewController *toVC;
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@property (nonatomic, assign) NSTimeInterval duration;
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@property (nonatomic, strong) UIView *containerView;
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- (instancetype)initWithFromVC:(UIViewController *)fromVC toVC:(UIViewController *)toVC duration:(NSTimeInterval)duration containerView:(UIView *)containerView;
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@end
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@interface HWPanModalPresentationAnimator ()
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@property (nonatomic, assign) TransitionStyle transitionStyle;
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@property (nullable, nonatomic, strong) UISelectionFeedbackGenerator *feedbackGenerator API_AVAILABLE(ios(10.0));
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@property (nonatomic, strong) HWPresentingVCTransitionContext *presentingVCTransitionContext;
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@property (nonatomic, assign) PanModalInteractiveMode interactiveMode;
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@end
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@implementation HWPanModalPresentationAnimator
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- (instancetype)initWithTransitionStyle:(TransitionStyle)transitionStyle interactiveMode:(PanModalInteractiveMode)mode {
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self = [super init];
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if (self) {
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_transitionStyle = transitionStyle;
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_interactiveMode = mode;
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if (transitionStyle == TransitionStylePresentation) {
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if (@available(iOS 10.0, *)) {
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_feedbackGenerator = [UISelectionFeedbackGenerator new];
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[_feedbackGenerator prepare];
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} else {
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// Fallback on earlier versions
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}
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}
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}
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return self;
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}
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/**
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* 弹出controller动画
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*/
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- (void)animatePresentation:(id<UIViewControllerContextTransitioning>)context {
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UIViewController *toVC = [context viewControllerForKey:UITransitionContextToViewControllerKey];
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UIViewController *fromVC = [context viewControllerForKey:UITransitionContextFromViewControllerKey];
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if (!toVC && !fromVC)
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return;
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UIViewController<HWPanModalPresentable> *presentable = [self panModalViewController:context];
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if ([presentable shouldEnableAppearanceTransition]) {
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// If you are implementing a custom container controller, use this method to tell the child that its views are about to appear or disappear.
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[fromVC beginAppearanceTransition:NO animated:YES];
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[self beginAppearanceTransitionForController:toVC isAppearing:YES animated:YES];
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}
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CGFloat yPos = presentable.shortFormYPos;
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if ([presentable originPresentationState] == PresentationStateLong) {
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yPos = presentable.longFormYPos;
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} else if ([presentable originPresentationState] == PresentationStateMedium) {
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yPos = presentable.mediumFormYPos;
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}
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UIView *panView = context.containerView.panContainerView ?: toVC.view;
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panView.frame = [context finalFrameForViewController:toVC];
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panView.hw_top = context.containerView.frame.size.height;
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if ([presentable isHapticFeedbackEnabled]) {
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if (@available(iOS 10.0, *)) {
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[self.feedbackGenerator selectionChanged];
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}
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}
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[HWPanModalAnimator animate:^{
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panView.hw_top = yPos;
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} config:presentable completion:^(BOOL completion) {
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if ([presentable shouldEnableAppearanceTransition]) {
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[fromVC endAppearanceTransition];
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[self endAppearanceTransitionForController:toVC];
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}
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if (@available(iOS 10.0, *)) {
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self.feedbackGenerator = nil;
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}
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[context completeTransition:completion];
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}];
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self.presentingVCTransitionContext = [[HWPresentingVCTransitionContext alloc] initWithFromVC:fromVC toVC:toVC duration:[presentable transitionDuration] containerView:context.containerView];
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[self presentAnimationForPresentingVC:presentable];
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}
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/**
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* 使弹出controller消失动画
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*/
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- (void)animateDismissal:(id<UIViewControllerContextTransitioning>)context {
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UIViewController *fromVC = [context viewControllerForKey:UITransitionContextFromViewControllerKey];
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UIViewController *toVC = [context viewControllerForKey:UITransitionContextToViewControllerKey];
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if (!fromVC && !toVC)
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return;
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UIViewController<HWPanModalPresentable> *presentable = [self panModalViewController:context];
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if ([presentable shouldEnableAppearanceTransition]) {
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[self beginAppearanceTransitionForController:fromVC isAppearing:NO animated:YES];
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[toVC beginAppearanceTransition:YES animated:YES];
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}
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UIView *panView = context.containerView.panContainerView ?: fromVC.view;
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self.presentingVCTransitionContext = [[HWPresentingVCTransitionContext alloc] initWithFromVC:fromVC toVC:toVC duration:[presentable transitionDuration] containerView:context.containerView];
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// user toggle pan gesture to dismiss.
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if ([context isInteractive]) {
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[self interactionDismiss:context fromVC:fromVC toVC:toVC presentable:presentable panView:panView];
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} else {
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[self springDismiss:context fromVC:fromVC toVC:toVC presentable:presentable panView:panView];
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}
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}
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- (void)springDismiss:(id <UIViewControllerContextTransitioning>)context fromVC:(UIViewController *)fromVC toVC:(UIViewController *)toVC presentable:(UIViewController <HWPanModalPresentable> *)presentable panView:(UIView *)panView {
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CGFloat offsetY = 0;
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HWPanModalShadow *shadowConfig = [presentable contentShadow];
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if (shadowConfig.shadowColor) {
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// we should make the panView move further to hide the shadow effect.
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offsetY = offsetY + shadowConfig.shadowRadius + shadowConfig.shadowOffset.height;
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if ([presentable showDragIndicator]) {
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offsetY += [presentable customIndicatorView] ? [presentable customIndicatorView].indicatorSize.height : 13;
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}
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}
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[HWPanModalAnimator dismissAnimate:^{
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[self dismissAnimationForPresentingVC:presentable];
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panView.hw_top = (context.containerView.frame.size.height + offsetY);
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} config:presentable completion:^(BOOL completion) {
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[fromVC.view removeFromSuperview];
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if ([presentable shouldEnableAppearanceTransition]) {
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[self endAppearanceTransitionForController:fromVC];
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[toVC endAppearanceTransition];
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}
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[context completeTransition:completion];
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}];
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}
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- (void)interactionDismiss:(id <UIViewControllerContextTransitioning>)context fromVC:(UIViewController *)fromVC toVC:(UIViewController *)toVC presentable:(UIViewController <HWPanModalPresentable> *)presentable panView:(UIView *)panView {
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[HWPanModalAnimator smoothAnimate:^{
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if (self.interactiveMode == PanModalInteractiveModeSideslip) {
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panView.hw_left = panView.hw_width;
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}
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[self dismissAnimationForPresentingVC:presentable];
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} duration:[presentable dismissalDuration] completion:^(BOOL completion) {
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// 因为会有手势交互，所以需要判断transitions是否cancel
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BOOL finished = ![context transitionWasCancelled];
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if (finished) {
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[fromVC.view removeFromSuperview];
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if ([presentable shouldEnableAppearanceTransition]) {
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[self endAppearanceTransitionForController:fromVC];
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[toVC endAppearanceTransition];
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}
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context.containerView.userInteractionEnabled = YES;
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}
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[context completeTransition:finished];
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}];
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}
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#pragma mark - presenting VC animation
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- (void)presentAnimationForPresentingVC:(UIViewController<HWPanModalPresentable> *)presentable {
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id<HWPresentingViewControllerAnimatedTransitioning> presentingAnimation = [self presentingVCAnimation:presentable];
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if (presentingAnimation) {
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[presentingAnimation presentAnimateTransition:self.presentingVCTransitionContext];
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}
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}
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- (void)dismissAnimationForPresentingVC:(UIViewController<HWPanModalPresentable> *)presentable {
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id<HWPresentingViewControllerAnimatedTransitioning> presentingAnimation = [self presentingVCAnimation:presentable];
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if (presentingAnimation) {
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[presentingAnimation dismissAnimateTransition:self.presentingVCTransitionContext];
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}
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}
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- (UIViewController <HWPanModalPresentable> *)panModalViewController:(id <UIViewControllerContextTransitioning>)context {
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switch (self.transitionStyle) {
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case TransitionStylePresentation: {
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UIViewController *controller = [context viewControllerForKey:UITransitionContextToViewControllerKey];
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if ([controller conformsToProtocol:@protocol(HWPanModalPresentable)]) {
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return (UIViewController <HWPanModalPresentable> *) controller;
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} else {
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return nil;
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}
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}
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case TransitionStyleDismissal: {
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UIViewController *controller = [context viewControllerForKey:UITransitionContextFromViewControllerKey];
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if ([controller conformsToProtocol:@protocol(HWPanModalPresentable)]) {
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return (UIViewController <HWPanModalPresentable> *) controller;
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} else {
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return nil;
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}
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}
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}
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}
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#pragma mark - UIViewControllerAnimatedTransitioning
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- (void)animateTransition:(nonnull id<UIViewControllerContextTransitioning>)transitionContext {
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switch (self.transitionStyle) {
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case TransitionStylePresentation: {
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[self animatePresentation:transitionContext];
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}
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break;
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case TransitionStyleDismissal: {
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[self animateDismissal:transitionContext];
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}
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default:
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break;
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}
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}
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- (NSTimeInterval)transitionDuration:(nullable id<UIViewControllerContextTransitioning>)transitionContext {
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if (transitionContext && [self panModalViewController:transitionContext]) {
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UIViewController<HWPanModalPresentable> *controller = [self panModalViewController:transitionContext];
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return [controller transitionDuration];
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}
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return kTransitionDuration;
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}
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#pragma mark - presenting animated transition
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- (id<HWPresentingViewControllerAnimatedTransitioning>)presentingVCAnimation:(UIViewController<HWPanModalPresentable> *)presentable {
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switch ([presentable presentingVCAnimationStyle]) {
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case PresentingViewControllerAnimationStylePageSheet:
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return [HWPageSheetPresentingAnimation new];
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case PresentingViewControllerAnimationStyleShoppingCart:
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return [HWShoppingCartPresentingAnimation new];
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case PresentingViewControllerAnimationStyleCustom:
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return [presentable customPresentingVCAnimation];
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default:
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return nil;
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}
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}
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#pragma mark - private method
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- (void)beginAppearanceTransitionForController:(UIViewController *)viewController isAppearing:(BOOL)isAppearing animated:(BOOL)animated {
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// Fix `The unbalanced calls to begin/end appearance transitions` warning.
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if (![viewController isKindOfClass:UINavigationController.class]) {
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[viewController beginAppearanceTransition:isAppearing animated:animated];
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}
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}
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- (void)endAppearanceTransitionForController:(UIViewController *)viewController {
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if (![viewController isKindOfClass:UINavigationController.class]) {
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[viewController endAppearanceTransition];
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}
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}
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@end
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@implementation HWPresentingVCTransitionContext
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- (instancetype)initWithFromVC:(UIViewController *)fromVC toVC:(UIViewController *)toVC duration:(NSTimeInterval)duration containerView:(UIView *)containerView {
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self = [super init];
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if (self) {
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_fromVC = fromVC;
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_toVC = toVC;
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_duration = duration;
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_containerView = containerView;
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}
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return self;
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}
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- (__kindof UIViewController *)viewControllerForKey:(UITransitionContextViewControllerKey)key {
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if ([key isEqualToString:UITransitionContextFromViewControllerKey]) {
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return self.fromVC;
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} else if ([key isEqualToString:UITransitionContextToViewControllerKey]) {
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return self.toVC;
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}
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return nil;
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}
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- (NSTimeInterval)transitionDuration {
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return self.duration;
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}
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@end
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