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"
@implementation RCTWrapperViewController
{
UIView *_wrapperView;
UIView *_contentView;
RCTEventDispatcher *_eventDispatcher;
CGFloat _previousTopLayout;
CGFloat _previousBottomLayout;
}
@synthesize currentTopLayoutGuide = _currentTopLayoutGuide;
@synthesize currentBottomLayoutGuide = _currentBottomLayoutGuide;
- (instancetype)initWithContentView:(UIView *)contentView
eventDispatcher:(RCTEventDispatcher *)eventDispatcher
{
if (self = [super initWithNibName:nil bundle:nil]) {
_contentView = contentView;
_eventDispatcher = eventDispatcher;
self.automaticallyAdjustsScrollViewInsets = NO;
}
return self;
}
- (instancetype)initWithNavItem:(RCTNavItem *)navItem
eventDispatcher:(RCTEventDispatcher *)eventDispatcher
{
if (self = [self initWithContentView:navItem eventDispatcher:eventDispatcher]) {
_navItem = navItem;
}
return self;
}
- (void)viewWillLayoutSubviews
{
[super viewWillLayoutSubviews];
_currentTopLayoutGuide = self.topLayoutGuide;
_currentBottomLayoutGuide = self.bottomLayoutGuide;
}
- (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];
if (!_navItem) {
return;
}
UINavigationBar *bar = self.navigationController.navigationBar;
bar.barTintColor = _navItem.barTintColor;
bar.tintColor = _navItem.tintColor;
if (_navItem.titleTextColor) {
[bar setTitleTextAttributes:@{NSForegroundColorAttributeName : _navItem.titleTextColor}];
}
UINavigationItem *item = self.navigationItem;
item.title = _navItem.title;
item.backBarButtonItem = _navItem.backButtonItem;
if ((item.leftBarButtonItem = _navItem.leftButtonItem)) {
item.leftBarButtonItem.target = self;
item.leftBarButtonItem.action = @selector(handleNavLeftButtonTapped);
}
if ((item.rightBarButtonItem = _navItem.rightButtonItem)) {
item.rightBarButtonItem.target = self;
item.rightBarButtonItem.action = @selector(handleNavRightButtonTapped);
}
}
}
- (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)handleNavLeftButtonTapped
{
[_eventDispatcher sendInputEventWithName:@"topNavLeftButtonTap"
body:@{@"target":_navItem.reactTag}];
}
- (void)handleNavRightButtonTapped
{
[_eventDispatcher sendInputEventWithName:@"topNavRightButtonTap"
body:@{@"target":_navItem.reactTag}];
}
- (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