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1 /* | 1 /* |
2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "RTCUIApplicationStatusObserver.h" | 11 #include "RTCUIApplicationStatusObserver.h" |
12 | 12 |
13 #if defined(WEBRTC_IOS) | 13 #if defined(WEBRTC_IOS) |
14 | 14 |
15 #import <UIKit/UIKit.h> | 15 #import <UIKit/UIKit.h> |
16 | 16 |
17 #include "webrtc/rtc_base/checks.h" | 17 #include "webrtc/rtc_base/checks.h" |
18 | 18 |
19 @interface RTCUIApplicationStatusObserver () | |
20 | |
21 @property(nonatomic, assign) UIApplicationState state; | |
22 | |
23 @end | |
24 | |
19 @implementation RTCUIApplicationStatusObserver { | 25 @implementation RTCUIApplicationStatusObserver { |
20 BOOL _initialized; | 26 BOOL _initialized; |
21 dispatch_block_t _initializeBlock; | 27 dispatch_block_t _initializeBlock; |
22 UIApplicationState _state; | 28 UIApplicationState _state; |
29 | |
30 id<NSObject> _activeObserver; | |
31 id<NSObject> _backgroundObserver; | |
23 } | 32 } |
24 | 33 |
34 @synthesize state; | |
35 | |
25 + (instancetype)sharedInstance { | 36 + (instancetype)sharedInstance { |
26 static id sharedInstance; | 37 static id sharedInstance; |
27 static dispatch_once_t onceToken; | 38 static dispatch_once_t onceToken; |
28 dispatch_once(&onceToken, ^{ | 39 dispatch_once(&onceToken, ^{ |
29 sharedInstance = [[self alloc] init]; | 40 sharedInstance = [[self alloc] init]; |
30 }); | 41 }); |
31 | 42 |
32 return sharedInstance; | 43 return sharedInstance; |
33 } | 44 } |
34 | 45 |
35 - (id)init { | 46 - (id)init { |
36 if (self = [super init]) { | 47 if (self = [super init]) { |
37 NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; | 48 NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; |
38 [center addObserverForName:UIApplicationDidBecomeActiveNotification | 49 __weak RTCUIApplicationStatusObserver *weakSelf = self; |
39 object:nil | 50 _activeObserver = [center addObserverForName:UIApplicationDidBecomeActiveNot ification |
40 queue:[NSOperationQueue mainQueue] | 51 object:nil |
41 usingBlock:^(NSNotification *note) { | 52 queue:[NSOperationQueue mainQueue] |
42 _state = [UIApplication sharedApplication].applicationStat e; | 53 usingBlock:^(NSNotification *note) { |
43 }]; | 54 weakSelf.state = |
55 [UIApplication sharedApplication].ap plicationState; | |
56 }]; | |
44 | 57 |
45 [center addObserverForName:UIApplicationDidEnterBackgroundNotification | 58 _backgroundObserver = [center addObserverForName:UIApplicationDidEnterBackgr oundNotification |
46 object:nil | 59 object:nil |
47 queue:[NSOperationQueue mainQueue] | 60 queue:[NSOperationQueue mainQueue ] |
48 usingBlock:^(NSNotification *note) { | 61 usingBlock:^(NSNotification *note) { |
49 _state = [UIApplication sharedApplication].applicationStat e; | 62 weakSelf.state = |
50 }]; | 63 [UIApplication sharedApplication ].applicationState; |
64 }]; | |
51 | 65 |
52 _initialized = NO; | 66 _initialized = NO; |
53 _initializeBlock = dispatch_block_create(DISPATCH_BLOCK_INHERIT_QOS_CLASS, ^ { | 67 _initializeBlock = dispatch_block_create(DISPATCH_BLOCK_INHERIT_QOS_CLASS, ^ { |
54 _state = [UIApplication sharedApplication].applicationState; | 68 _state = [UIApplication sharedApplication].applicationState; |
Chuck
2017/09/12 13:25:51
This and _initialized both have an implicit refere
andersc
2017/09/12 13:43:41
Done.
| |
55 _initialized = YES; | 69 _initialized = YES; |
56 }); | 70 }); |
57 | 71 |
58 dispatch_async(dispatch_get_main_queue(), _initializeBlock); | 72 dispatch_async(dispatch_get_main_queue(), _initializeBlock); |
59 } | 73 } |
60 | 74 |
61 return self; | 75 return self; |
62 } | 76 } |
63 | 77 |
78 - (void)dealloc { | |
79 NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; | |
80 [center removeObserver:_activeObserver]; | |
81 [center removeObserver:_backgroundObserver]; | |
82 } | |
83 | |
64 - (BOOL)isApplicationActive { | 84 - (BOOL)isApplicationActive { |
65 if (!_initialized) { | 85 if (!_initialized) { |
66 long ret = dispatch_block_wait(_initializeBlock, | 86 long ret = dispatch_block_wait(_initializeBlock, |
67 dispatch_time(DISPATCH_TIME_NOW, 10.0 * NSEC_ PER_SEC)); | 87 dispatch_time(DISPATCH_TIME_NOW, 10.0 * NSEC_ PER_SEC)); |
68 RTC_DCHECK_EQ(ret, 0); | 88 RTC_DCHECK_EQ(ret, 0); |
69 } | 89 } |
70 return _state == UIApplicationStateActive; | 90 return _state == UIApplicationStateActive; |
71 } | 91 } |
72 | 92 |
73 @end | 93 @end |
74 | 94 |
75 #endif // WEBRTC_IOS | 95 #endif // WEBRTC_IOS |
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