react-native/React/Views/RCTWrapperViewController.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTWrapperViewController.h"
#import <UIKit/UIScrollView.h>
#import "RCTEventDispatcher.h"
#import "RCTNavItem.h"
#import "RCTUtils.h"
#import "RCTViewControllerProtocol.h"
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#import "UIView+React.h"
#import "RCTAutoInsetsProtocol.h"
@implementation RCTWrapperViewController
{
UIView *_wrapperView;
UIView *_contentView;
RCTEventDispatcher *_eventDispatcher;
CGFloat _previousTopLayoutLength;
CGFloat _previousBottomLayoutLength;
}
@synthesize currentTopLayoutGuide = _currentTopLayoutGuide;
@synthesize currentBottomLayoutGuide = _currentBottomLayoutGuide;
- (instancetype)initWithContentView:(UIView *)contentView
{
RCTAssertParam(contentView);
if ((self = [super initWithNibName:nil bundle:nil])) {
_contentView = contentView;
self.automaticallyAdjustsScrollViewInsets = NO;
}
return self;
}
- (instancetype)initWithNavItem:(RCTNavItem *)navItem
{
if ((self = [self initWithContentView:navItem])) {
_navItem = navItem;
}
return self;
}
RCT_NOT_IMPLEMENTED(- (instancetype)initWithNibName:(NSString *)nn bundle:(NSBundle *)nb)
RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)aDecoder)
- (void)viewWillLayoutSubviews
{
[super viewWillLayoutSubviews];
_currentTopLayoutGuide = self.topLayoutGuide;
_currentBottomLayoutGuide = self.bottomLayoutGuide;
}
static BOOL RCTFindScrollViewAndRefreshContentInsetInView(UIView *view)
{
if ([view conformsToProtocol:@protocol(RCTAutoInsetsProtocol)]) {
[(id <RCTAutoInsetsProtocol>) view refreshContentInset];
return YES;
}
for (UIView *subview in view.subviews) {
if (RCTFindScrollViewAndRefreshContentInsetInView(subview)) {
return YES;
}
}
return NO;
}
- (void)viewDidLayoutSubviews
{
[super viewDidLayoutSubviews];
if (_previousTopLayoutLength != _currentTopLayoutGuide.length ||
_previousBottomLayoutLength != _currentBottomLayoutGuide.length) {
RCTFindScrollViewAndRefreshContentInsetInView(_contentView);
_previousTopLayoutLength = _currentTopLayoutGuide.length;
_previousBottomLayoutLength = _currentBottomLayoutGuide.length;
}
}
static UIView *RCTFindNavBarShadowViewInView(UIView *view)
{
if ([view isKindOfClass:[UIImageView class]] && view.bounds.size.height <= 1) {
return view;
}
for (UIView *subview in view.subviews) {
UIView *shadowView = RCTFindNavBarShadowViewInView(subview);
if (shadowView) {
return shadowView;
}
}
return nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// TODO: find a way to make this less-tightly coupled to navigation controller
if ([self.parentViewController isKindOfClass:[UINavigationController class]])
{
[self.navigationController
setNavigationBarHidden:_navItem.navigationBarHidden
animated:animated];
UINavigationBar *bar = self.navigationController.navigationBar;
bar.barTintColor = _navItem.barTintColor;
bar.tintColor = _navItem.tintColor;
bar.translucent = _navItem.translucent;
#if !TARGET_OS_TV
bar.barStyle = _navItem.barStyle;
#endif
bar.titleTextAttributes = _navItem.titleTextColor ? @{
NSForegroundColorAttributeName: _navItem.titleTextColor
} : nil;
RCTFindNavBarShadowViewInView(bar).hidden = _navItem.shadowHidden;
UINavigationItem *item = self.navigationItem;
item.title = _navItem.title;
item.titleView = _navItem.titleImageView;
#if !TARGET_OS_TV
item.backBarButtonItem = _navItem.backButtonItem;
#endif //TARGET_OS_TV
item.leftBarButtonItem = _navItem.leftButtonItem;
item.rightBarButtonItem = _navItem.rightButtonItem;
}
}
- (void)loadView
{
// Add a wrapper so that the wrapper view managed by the
// UINavigationController doesn't end up resetting the frames for
//`contentView` which is a react-managed view.
_wrapperView = [[UIView alloc] initWithFrame:_contentView.bounds];
[_wrapperView addSubview:_contentView];
self.view = _wrapperView;
}
- (void)didMoveToParentViewController:(UIViewController *)parent
{
// There's no clear setter for navigation controllers, but did move to parent
// view controller provides the desired effect. This is called after a pop
// finishes, be it a swipe to go back or a standard tap on the back button
[super didMoveToParentViewController:parent];
if (parent == nil || [parent isKindOfClass:[UINavigationController class]]) {
[self.navigationListener wrapperViewController:self
didMoveToNavigationController:(UINavigationController *)parent];
}
}
@end