mirror of
https://github.com/status-im/react-native.git
synced 2025-02-06 06:34:01 +00:00
34ec6a91a9
Summary: Previously, if a module implemented `setBridge:` we assumed that it needs to be initialised on the main thread. This assumption was not really warranted however, and it was a barrier to deferring module initialization. This diff tweaks the rules so that only modules that override `init` or `constantsToExport**` are assumed to require main thread initialization, and others can be created lazily when they are first used. WARNING: this will be a breaking change to any 3rd party modules that are assuming `setBridge:` is called on the main thread. Those modules should be rewritten to move any code that requires the main thread into `init` or `constantsToExport` instead. `**` We will also be examining whether `constantsToExport` can be done lazily, but for now any module that uses it will still be created eagerly when the bridge starts up. Reviewed By: javache Differential Revision: D3240682 fb-gh-sync-id: 48f309e3158bbccb52141032baf70def3e609371 fbshipit-source-id: 48f309e3158bbccb52141032baf70def3e609371
122 lines
3.3 KiB
Objective-C
122 lines
3.3 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTAppState.h"
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#import "RCTAssert.h"
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#import "RCTBridge.h"
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#import "RCTEventDispatcher.h"
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#import "RCTUtils.h"
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static NSString *RCTCurrentAppBackgroundState()
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{
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static NSDictionary *states;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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states = @{
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@(UIApplicationStateActive): @"active",
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@(UIApplicationStateBackground): @"background"
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};
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});
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if (RCTRunningInAppExtension()) {
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return @"extension";
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}
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return states[@(RCTSharedApplication().applicationState)] ?: @"unknown";
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}
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@implementation RCTAppState
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{
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NSString *_lastKnownState;
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}
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@synthesize bridge = _bridge;
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RCT_EXPORT_MODULE()
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#pragma mark - Lifecycle
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- (instancetype)init
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{
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if ((self = [super init])) {
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// Needs to be called on the main thread, as it accesses UIApplication
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_lastKnownState = RCTCurrentAppBackgroundState();
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}
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return self;
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}
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- (void)setBridge:(RCTBridge *)bridge
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{
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_bridge = bridge;
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for (NSString *name in @[UIApplicationDidBecomeActiveNotification,
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UIApplicationDidEnterBackgroundNotification,
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UIApplicationDidFinishLaunchingNotification,
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UIApplicationWillResignActiveNotification,
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UIApplicationWillEnterForegroundNotification]) {
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(handleAppStateDidChange:)
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name:name
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object:nil];
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}
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(handleMemoryWarning)
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name:UIApplicationDidReceiveMemoryWarningNotification
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object:nil];
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}
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- (void)handleMemoryWarning
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{
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[_bridge.eventDispatcher sendDeviceEventWithName:@"memoryWarning"
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body:nil];
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}
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- (void)dealloc
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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#pragma mark - App Notification Methods
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- (void)handleAppStateDidChange:(NSNotification *)notification
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{
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NSString *newState;
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if ([notification.name isEqualToString:UIApplicationWillResignActiveNotification]) {
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newState = @"inactive";
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} else if ([notification.name isEqualToString:UIApplicationWillEnterForegroundNotification]) {
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newState = @"background";
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} else {
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newState = RCTCurrentAppBackgroundState();
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}
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if (![newState isEqualToString:_lastKnownState]) {
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_lastKnownState = newState;
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[_bridge.eventDispatcher sendDeviceEventWithName:@"appStateDidChange"
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body:@{@"app_state": _lastKnownState}];
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}
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}
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#pragma mark - Public API
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/**
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* Get the current background/foreground state of the app
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*/
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RCT_EXPORT_METHOD(getCurrentAppState:(RCTResponseSenderBlock)callback
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error:(__unused RCTResponseSenderBlock)error)
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{
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callback(@[@{@"app_state": _lastKnownState}]);
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}
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@end
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