react-native/Libraries/Wrapper/RCTWrapperViewControllerHos...

133 lines
3.4 KiB
Objective-C

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