134 lines
3.4 KiB
Objective-C
134 lines
3.4 KiB
Objective-C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTWrapperViewControllerHostingView.h"
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#import <React/UIView+React.h>
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#pragma mark - UIViewController+Children
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@interface UIViewController (Children)
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@property (nonatomic, readonly) BOOL isAttached;
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- (void)attachChildViewController:(UIViewController *)childViewController toContainerView:(UIView *)containerView;
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- (void)detachChildViewController:(UIViewController *)childViewController;
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@end
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@implementation UIViewController (Children)
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- (BOOL)isAttached
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{
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return self.parentViewController != nil;
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}
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- (void)attachChildViewController:(UIViewController *)childViewController toContainerView:(UIView *)containerView
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{
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[self addChildViewController:childViewController];
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// `[childViewController willMoveToParentViewController:self]` is calling automatically
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[containerView addSubview:childViewController.view];
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childViewController.view.frame = containerView.bounds;
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childViewController.view.translatesAutoresizingMaskIntoConstraints = YES;
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childViewController.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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[childViewController didMoveToParentViewController:self];
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[childViewController beginAppearanceTransition:true animated:false];
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[childViewController endAppearanceTransition];
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}
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- (void)detachChildViewController:(UIViewController *)childViewController
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{
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[childViewController beginAppearanceTransition:false animated:false];
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[childViewController endAppearanceTransition];
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[childViewController willMoveToParentViewController:nil];
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[childViewController.view removeFromSuperview];
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[childViewController removeFromParentViewController];
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// `[childViewController didMoveToParentViewController:nil]` is calling automatically
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}
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@end
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@implementation RCTWrapperViewControllerHostingView {
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UIViewController *_Nullable _contentViewController;
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}
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#pragma mark - `contentViewController`
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- (nullable UIViewController *)contentViewController
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{
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return _contentViewController;
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}
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- (void)setContentViewController:(UIViewController *)contentViewController
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{
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if (_contentViewController) {
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[self detachContentViewControllerIfNeeded];
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}
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_contentViewController = contentViewController;
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if (_contentViewController) {
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[self attachContentViewControllerIfNeeded];
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}
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}
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#pragma mark - Attaching and Detaching
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- (void)attachContentViewControllerIfNeeded
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{
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if (self.contentViewController.isAttached) {
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return;
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}
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[self.reactViewController attachChildViewController:self.contentViewController toContainerView:self];
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}
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- (void)detachContentViewControllerIfNeeded
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{
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if (!self.contentViewController.isAttached) {
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return;
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}
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[self.reactViewController detachChildViewController:self.contentViewController];
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}
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#pragma mark - Life cycle
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- (void)willMoveToWindow:(UIWindow *)newWindow
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{
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if (newWindow == nil) {
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[self detachContentViewControllerIfNeeded];
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}
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}
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- (void)didMoveToWindow
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{
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[super didMoveToWindow];
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[self attachContentViewControllerIfNeeded];
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}
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#pragma mark - Layout
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- (void)setNeedsLayout
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{
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[super setNeedsLayout];
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[self.superview setNeedsLayout];
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}
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- (CGSize)intrinsicContentSize
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{
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return self.contentViewController.view.intrinsicContentSize;
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}
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- (CGSize)sizeThatFits:(CGSize)size
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{
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return [self.contentViewController.view sizeThatFits:size];
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}
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@end
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