Improvement to make code self-contained in Plugin

[shazron]

Instead of adding the code in didFinishLaunchingWithOptions(), consider adding it in your plugin's method (add the method if its missing):

- (void) pluginInitialize();

This code:

phonegap-dropbox-sync/plugin/src/ios/Classes/AppDelegate.m

Lines 70 to 80 in 682b333

	NSLog(@"initializing DBAccountManager");
	DBAccountManager *accountManager =
	[[DBAccountManager alloc] initWithAppKey:@"irylk73l2cucd1v" secret:@"vw8ld6rdebdqayi"];
	[DBAccountManager setSharedManager:accountManager];
	DBAccount *account = [accountManager.linkedAccounts objectAtIndex:0];
	if (account) {
	DBFilesystem *filesystem = [[DBFilesystem alloc] initWithAccount:account];
	NSLog(@"App linked successfully from didFinishLaunchingWithOptions!");
	[DBFilesystem setSharedFilesystem:filesystem];
	}

Can be in your plugin as:

- (void) pluginInitialize {
    NSLog(@"initializing DBAccountManager");
    DBAccountManager *accountManager =
    [[DBAccountManager alloc] initWithAppKey:@"irylk73l2cucd1v" secret:@"vw8ld6rdebdqayi"];
    [DBAccountManager setSharedManager:accountManager];

    DBAccount *account = [accountManager.linkedAccounts objectAtIndex:0];
    if (account) {
        DBFilesystem *filesystem = [[DBFilesystem alloc] initWithAccount:account];
        NSLog(@"App linked successfully from didFinishLaunchingWithOptions!");
        [DBFilesystem setSharedFilesystem:filesystem];
    }
}

Don't forget to add the required import headers as well at the top of your plugin.

#import <Dropbox/Dropbox.h>

From the Plugin Dev Guide: "There is no designated initializer for plugins. Instead, plugins should use the pluginInitialize method for their start-up logic."

Example use: https://github.com/apache/cordova-ios/blob/9e47ed817fdad4669a8ce92908eb63320dda593a/CordovaLib/Classes/CDVLocalStorage.m#L34-L41

To load the plugin at startup, you can add an:

onload="true"

... attribute to the feature's param tag: https://github.com/apache/cordova-ios/blob/951b6cb2f6d920b2cd28dd9598274331ad5a0d47/CordovaLibTests/CordovaLibApp/config.xml#L57

If you don't add that, the plugin is lazily loaded (load on first use).