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支持 setViewControllers:animate: 方法 #103

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支持 setViewControllers:animate: 方法 #103

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62 changes: 49 additions & 13 deletions FDFullscreenPopGesture/UINavigationController+FDFullscreenPopGesture.m
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ - (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer
if (maxAllowedInitialDistance > 0 && beginningLocation.x > maxAllowedInitialDistance) {
return NO;
}

// Ignore pan gesture when the navigation controller is currently in transition.
if ([[self.navigationController valueForKey:@"_isTransitioning"] boolValue]) {
return NO;
Expand Down Expand Up @@ -142,33 +142,69 @@ + (void)load
method_exchangeImplementations(originalMethod, swizzledMethod);
}
});

// Inject "-setViewControllers:animated:"
static dispatch_once_t onceToken2;
dispatch_once(&onceToken2, ^{
Class class = [self class];

SEL originalSelector = @selector(setViewControllers:animated:);
SEL swizzledSelector = @selector(fd_setViewControllers:animated:);

Method originalMethod = class_getInstanceMethod(class, originalSelector);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);

BOOL success = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
if (success) {
class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
});
}

- (void)fd_pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
[self fd_addFullscreenPopGestureRecognizer];

// Handle perferred navigation bar appearance.
[self fd_setupViewControllerBasedNavigationBarAppearanceIfNeeded:viewController];

// Forward to primary implementation.
if (![self.viewControllers containsObject:viewController]) {
[self fd_pushViewController:viewController animated:animated];
}
}

- (void)fd_setViewControllers:(NSArray<UIViewController *> *)viewControllers animated:(BOOL)animated
{
[self fd_addFullscreenPopGestureRecognizer];

// Handle perferred navigation bar appearance.
for (UIViewController *viewController in viewControllers) {
[self fd_setupViewControllerBasedNavigationBarAppearanceIfNeeded:viewController];
}

[self fd_setViewControllers:viewControllers animated:animated];
}

- (void)fd_addFullscreenPopGestureRecognizer
{
if (![self.interactivePopGestureRecognizer.view.gestureRecognizers containsObject:self.fd_fullscreenPopGestureRecognizer]) {

// Add our own gesture recognizer to where the onboard screen edge pan gesture recognizer is attached to.
[self.interactivePopGestureRecognizer.view addGestureRecognizer:self.fd_fullscreenPopGestureRecognizer];

// Forward the gesture events to the private handler of the onboard gesture recognizer.
NSArray *internalTargets = [self.interactivePopGestureRecognizer valueForKey:@"targets"];
id internalTarget = [internalTargets.firstObject valueForKey:@"target"];
SEL internalAction = NSSelectorFromString(@"handleNavigationTransition:");
self.fd_fullscreenPopGestureRecognizer.delegate = self.fd_popGestureRecognizerDelegate;
[self.fd_fullscreenPopGestureRecognizer addTarget:internalTarget action:internalAction];

// Disable the onboard gesture recognizer.
self.interactivePopGestureRecognizer.enabled = NO;
}

// Handle perferred navigation bar appearance.
[self fd_setupViewControllerBasedNavigationBarAppearanceIfNeeded:viewController];

// Forward to primary implementation.
if (![self.viewControllers containsObject:viewController]) {
[self fd_pushViewController:viewController animated:animated];
}
}

- (void)fd_setupViewControllerBasedNavigationBarAppearanceIfNeeded:(UIViewController *)appearingViewController
Expand Down Expand Up @@ -198,7 +234,7 @@ - (void)fd_setupViewControllerBasedNavigationBarAppearanceIfNeeded:(UIViewContro
- (_FDFullscreenPopGestureRecognizerDelegate *)fd_popGestureRecognizerDelegate
{
_FDFullscreenPopGestureRecognizerDelegate *delegate = objc_getAssociatedObject(self, _cmd);

if (!delegate) {
delegate = [[_FDFullscreenPopGestureRecognizerDelegate alloc] init];
delegate.navigationController = self;
Expand All @@ -211,7 +247,7 @@ - (_FDFullscreenPopGestureRecognizerDelegate *)fd_popGestureRecognizerDelegate
- (UIPanGestureRecognizer *)fd_fullscreenPopGestureRecognizer
{
UIPanGestureRecognizer *panGestureRecognizer = objc_getAssociatedObject(self, _cmd);

if (!panGestureRecognizer) {
panGestureRecognizer = [[UIPanGestureRecognizer alloc] init];
panGestureRecognizer.maximumNumberOfTouches = 1;
Expand Down