Enabled support for starting multiple tasks and closing a specific ta…

src/ios/BackgroundTask.h

@@ -9,5 +9,6 @@
 @interface BackgroundTask : CDVPlugin
 
 - (void) start:(CDVInvokedUrlCommand*)command;
+- (void) stop:(CDVInvokedUrlCommand*)command;
 
 @end

src/ios/BackgroundTask.m

@@ -7,26 +7,32 @@
 #import "Cordova/CDVViewController.h"
 #import "BackgroundTask.h"
 
-static UIBackgroundTaskIdentifier backgroundTaskId;
 
 @implementation BackgroundTask
 
-+ (void) initialize
-{
-    backgroundTaskId = UIBackgroundTaskInvalid;
-}
-
 - (void) start:(CDVInvokedUrlCommand*)command;
 {
-    backgroundTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
+    __block UIBackgroundTaskIdentifier backgroundTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
         [[UIApplication sharedApplication] endBackgroundTask:backgroundTaskId];
         backgroundTaskId = UIBackgroundTaskInvalid;
     }];
 
     [self.commandDelegate runInBackground:^{
-        CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
+        CDVPluginResult* pluginResult = [CDVPluginResult
+                                         resultWithStatus:CDVCommandStatus_OK
+                                         messageAsInt:(int)backgroundTaskId];
         [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
     }];
 }
 
+- (void) stop:(CDVInvokedUrlCommand*)command;
+{
+    if ([command.arguments count] > 0) {
+        int backgroundTaskId = [[command.arguments objectAtIndex:0] intValue];
+        [[UIApplication sharedApplication] endBackgroundTask:(UIBackgroundTaskIdentifier)backgroundTaskId];
+    } else {
+        NSLog(@"Called BackgroundTask.stop without TaskId");
+    }
+}
+
 @end

www/backgroundtask.js

@@ -9,4 +9,8 @@ BackgroundTask.prototype.start = function (task) {
     exec(task, null, "BackgroundTask", "start", []);
 };
 
+BackgroundTask.prototype.stop = function (taskId) {
+    exec(null, null, "BackgroundTask", "stop", [taskId]);
+};
+
 module.exports = new BackgroundTask();