fix: Avoid changes in values unexpected (#64)

* fix: Avoid changes in values unexpected

* Do not check stable

* Attempt to fix integration test check

* Add version

* Remove extra pub get

Co-authored-by: 李阳 <yang.li@plaso.me>
Co-authored-by: creativecreatorormaybenot <creativecreatorormaybenot@gmail.com>

@@ -24,7 +24,8 @@ jobs:
         os:
           - ubuntu-latest
         channel:
-          - 'stable'
+          # Do not check stable until NNBD is on stable.
+          #- 'stable'
           - 'beta'
           - 'dev'
         package:
@@ -55,7 +56,8 @@ jobs:
         device:
           - 'iPhone 11 Pro Max (14.0)'
         channel:
-          - 'stable'
+          # Do not check stable until NNBD is on stable.
+          #- 'stable'
           - 'beta'
           - 'dev'
         package:

@@ -3,6 +3,7 @@ description: >-2
   Example app demonstrating how to use the wakelock plugin. It also includes integration tests for
   testing the plugin in an integrated example.
 publish_to: 'none'
+version: 1.0.0+1
 
 environment:
   sdk: '>=2.12.0-0 <3.0.0'

 #import "WakelockPlugin.h"
 #import "messages.h"
 
+static void * mKeyPathObserverContextApplicationIsIdleTimerDisabled = &mKeyPathObserverContextApplicationIsIdleTimerDisabled;
+
 @interface WakelockPlugin () <FLTWakelockApi>
+
+@property (nonatomic, assign) BOOL enable;
+
 @end
 
 @implementation WakelockPlugin
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
   WakelockPlugin* instance = [[WakelockPlugin alloc] init];
   FLTWakelockApiSetup(registrar.messenger, instance);
+    
+  [UIApplication.sharedApplication addObserver:instance forKeyPath:@"idleTimerDisabled" options:NSKeyValueObservingOptionNew context:mKeyPathObserverContextApplicationIsIdleTimerDisabled];
 }
 
 - (void)toggle:(FLTToggleMessage*)input error:(FlutterError**)error {
   NSNumber *enable = input.enable;
+  self.enable = enable.boolValue;
   NSNumber *enabled = [NSNumber numberWithBool:[[UIApplication sharedApplication] isIdleTimerDisabled]];
   
   if (![enable isEqualToNumber:enabled]) {
@@ -28,4 +36,18 @@
   return result;
 }
 
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
+  if (context == mKeyPathObserverContextApplicationIsIdleTimerDisabled) {
+    if (UIApplication.sharedApplication.idleTimerDisabled != self.enable) {
+      UIApplication.sharedApplication.idleTimerDisabled = self.enable;
+    }
+  } else {
+    [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
+  }
+}
+
+- (void)dealloc {
+  [UIApplication.sharedApplication removeObserver:self forKeyPath:@"idleTimerDisabled" context:mKeyPathObserverContextApplicationIsIdleTimerDisabled];
+}
+
 @end