/* |
File: AppDelegate.m |
Abstract: The application delegate class used for installing the window and navigation controller. |
Version: 1.1 |
|
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Copyright (C) 2013 Apple Inc. All Rights Reserved. |
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*/ |
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#import "AppDelegate.h" |
#import "DataSource.h" |
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@implementation AppDelegate |
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- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions |
{ |
// place all initialization code here that needs to be called "before" state restoration occurs |
// |
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return YES; |
} |
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- (void)applicationWillResignActive:(UIApplication *)application |
{ |
// note that this delegate is called before state restoration |
// |
[[DataSource sharedInstance] save]; |
} |
|
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions |
{ |
// place all code that should occur "after" state restoration occurs (like password entry login, etc.) |
// |
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// require the window being visible before state restoration |
[self.window makeKeyAndVisible]; |
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return YES; |
} |
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// identify we are interested in storing application state, this is called when the app |
// is suspended to the background |
// |
- (BOOL)application:(UIApplication *)application shouldSaveApplicationState:(NSCoder *)coder |
{ |
return YES; |
} |
|
// identify we are interested in re-storing application state, |
// this is called when the app is re-launched |
// |
- (BOOL)application:(UIApplication *)application shouldRestoreApplicationState:(NSCoder *)coder |
{ |
return YES; |
} |
|
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#pragma mark - Restoration |
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// store data not necessarily related to the user interface, |
// this is called when the app is suspended to the background |
// |
- (void)application:(UIApplication *)application willEncodeRestorableStateWithCoder:(NSCoder *)coder |
{ |
// encode any state at the app delegate level |
} |
|
// reload data not necessarily related to the user interface, |
// this is called when the app is re-launched |
// |
- (void)application:(UIApplication *)application didDecodeRestorableStateWithCoder:(NSCoder *)coder |
{ |
// decode any state at the app delegate level |
// |
// if you plan to do any asynchronous initialization for restoration - |
// Use these methods to inform the system that state restoration is occuring |
// asynchronously after the application has processed its restoration archive on launch. |
// In the even of a crash, the system will be able to detect that it may have been |
// caused by a bad restoration archive and arrange to ignore it on a subsequent application launch. |
// |
[[UIApplication sharedApplication] extendStateRestoration]; |
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dispatch_queue_t globalQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); |
dispatch_async(globalQueue, ^{ |
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// do any additional asynchronous initialization work here... |
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dispatch_async(dispatch_get_main_queue(), ^{ |
|
// done asynchronously initializing, complete our state restoration |
// |
[[UIApplication sharedApplication] completeStateRestoration]; |
}); |
}); |
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// if you ever want to check for restore bundle version of user interface idiom, use this code: |
// |
//ask for the restoration version (used in case we have multiple versions of the app with varying UIs) |
// String with value of info.plist's Bundle Version (app version) when state was last saved for the app |
// |
NSString *restoreBundleVersion = [coder decodeObjectForKey:UIApplicationStateRestorationBundleVersionKey]; |
NSLog(@"Restore bundle version = %@", restoreBundleVersion); |
|
// ask for the restoration idiom (used in case user ran used to run an iPhone version but now running on an iPad) |
// NSNumber containing the UIUSerInterfaceIdiom enum value of the app that saved state |
// |
NSNumber *restoreUserInterfaceIdiom = [coder decodeObjectForKey:UIApplicationStateRestorationUserInterfaceIdiomKey]; |
NSLog(@"Restore User Interface Idiom = %d", restoreUserInterfaceIdiom.integerValue); |
} |
|
/* |
note: if you don't assign a restoration class to each view controller, |
here we need to implement "viewControllerWithRestorationIdentifierPath" |
*/ |
// creating a new view controller during restoration |
/* |
+ (UIViewController *)viewControllerWithRestorationIdentifierPath:(NSArray *)identifierComponents |
coder:(NSCoder *)coder |
{ |
//.. |
} |
*/ |
|
@end |
