mirror of
https://github.com/status-im/react-native.git
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72b363d7fc
Summary: As per https://twitter.com/olebegemann/status/738656134731599872, our use of "main thread" to mean "main queue" seems to be unsafe. This diff replaces the `NSThread.isMainQueue` checks with dispatch_get_specific(), which is the recommended approach. I've also replaced all use of "MainThread" terminology with "MainQueue", and taken the opportunity to deprecate the "sync" param of `RCTExecuteOnMainThread()`, which, while we do still use it in a few places, is incredibly unsafe and shouldn't be encouraged. Reviewed By: javache Differential Revision: D3384910 fbshipit-source-id: ea7c216013372267b82eb25a38db5eb4cd46a089
119 lines
3.2 KiB
Objective-C
119 lines
3.2 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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RCTAssertMainQueue();
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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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RCT_EXPORT_MODULE()
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- (dispatch_queue_t)methodQueue
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{
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return dispatch_get_main_queue();
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}
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#pragma mark - Lifecycle
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- (NSArray<NSString *> *)supportedEvents
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{
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return @[@"appStateDidChange", @"memoryWarning"];
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}
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- (void)startObserving
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{
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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)stopObserving
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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)handleMemoryWarning
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{
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[self sendEventWithName:@"memoryWarning" body:nil];
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}
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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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[self sendEventWithName:@"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": RCTCurrentAppBackgroundState()}]);
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}
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@end
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