- Parse is a backend as a service (BaaS) platform that provides tools and support for iOS, Android, and JavaScript development. - It offers features like data storage, user authentication, push notifications, and integration with social networks through a simple API. - Developers can store and query data, manage user accounts, send push notifications, and build mobile and web apps using Parse's SDKs and REST API.

1. What’s Parse
Tsutomu Ogasawara

2. https://www.parse.com/

3. What’s Parse?
• BaaS for iOS / Android
• Quick Start / Minimum Configuration
• Full Stack SDK
• Rest API / JavaScript SDK
• Useful Documentations / Tutorials
• Freemium

4. Code Examples
Objective-C for iOS
PFObject*post = [PFObjectobjectWithClassName:@"Post"];
[post setObject:@"Hello World"forKey:@"title"];
[post setObject:@"I got Parse working on iOS!"forKey:@"content"];
[post saveInBackground];
Java for Android
ParseObjectpost = new ParseObject("Post");
post.put("title", "Hello World");
post.put("content", "I got Parse working on Android!");
post.saveInBackground();
JavaScript
varPost = Parse.Object.extend("Post");
varpost = new Post();
post.set("title", "Hello World");
post.set("content", "I got Parse working on Android!");
post.save(null, { success: function() {}, error: function() {} );

5. Structure
Data Storage
User Authentication
Push Notification
Rest API
iOS SDK
JavaScript SDK
Android SDK
JavaScript SDK

6. Functions
• Data Storage / File Storage
• Push Notification Gateway
• User Management
• Geo Location Support
• Facebook& Twitter

7. Data Storage / File Storage
• SQL-like simple Database (PFObject)
– Schemaless row-column model
– Working in the background
– Spreadsheet-like Data browser on parse.com
– Many ways to retrieve data
• File store (PFFile)
– File storage up to 10MB per file.
– Working in the background and get the progress.
– Examples.

8. Save a photo
PFObject *photo = [PFObjectobjectWithClassName:@"Photo"];
PFUser *currentUser = [PFUsercurrentUser];
[photo setObject:currentUserforKey:@"user"];
[photo setObject:photoIDforKey:@"photo_id"];
[photo saveInBackgroundWithBlock:^(BOOLsucceeded, NSError *error) {
if( succeeded ) {
}
else {
}
}];
Retrieve photos
PFQuery *query = [PFQueryqueryWithClassName:@"Photo"];
[query orderByDescending:@"updatedAt"];
[query findObjectsInBackgroundWithBlock:
^(NSArray *objects, NSError *error) {
if( ! error ) {
}
else {
}
}];

9. Push Notification (PFPush)
• Cross platform
– iOS -> Android / Android ->iOS
– Broadcast to both OS apps.
• Send from
– Apps
– REST API
– Web console on parse.com

10. Subscribe push notification channel
PFUser *user = [PFUsercurrentUser];
NSString *channel = [NSStringstringWithFormat:@"user_%@", user.objectId];
[PFPushsubscribeToChannelInBackground:channelblock:
^(BOOLsucceeded, NSError *error) {
...
}];
Send a notification
PFUser *user = [photoObjectobjectForKey:@"user"];
NSString *channel = [NSStringstringWithFormat:@"user_%@", user.objectId];
NSString *commenter = [currentUser
valueForKeyPath:@"twitter_userdata.screen_name"];
NSString *alert = [NSStringstringWithFormat:
@"%@ さんがコメントしました。", commenter];
NSDictionary *data = [NSDictionarydictionaryWithObjectsAndKeys:
commentObject.objectId, @"comment",
photoObject.objectId, @"photo",
alert, @"alert",
@"default", @"sound",
nil];
[PFPushsendPushDataToChannelInBackground:channelwithData:data];

11. User Management (PFUser)
• Original Signup and Login
– Email address verification
– Resetting Password
– User Interfaces
• Login with Facebook& Twitter
• Security
– Access Control List (PFACL)
– Role-based Access Control (PFRole)

12. Geo Location (PFGeoPoint)
• Store a geo location data in PFObject
• Query objects
– ordered by distance.
– within miles / km / radians
– within rectangle from south-west to north-east
• Examples

13. Facebook& Twitter
• Authentication
• Libralies
– PF_Facebook which is the wrapper of
FacebookiOS SDK
– PF_Twitter which calls Twitter REST API

14. Facebook login
- (IBAction)pressLoginButton:(id)sender {
NSArray *permissions = [[NSArrayalloc] initWithObjects:
@"user_likes", @"read_stream”, nil];
// Switch Facebook app or open facebook login page in Safari
[PFFacebookUtilslogInWithPermissions:permissions block:
^(PFUser *user, NSError *error) {
if( user && ! error ) {
// logged in with Facebook
}
}];
}
Twitter login
- (IBAction)pressLoginButton:(id)sender {
// Call Twitter login dialog
[PFTwitterUtilslogInWithBlock:^(PFUser *user, NSError *error) {
if( user && ! error ) {
// logged in with Twitter
}
}];
}

15. Twitter API call with authentication
// generate request object
NSURL *url = [NSURLURLWithString:
@"https://api.twitter.com/1/account/verify_credentials.json"];
NSMutableURLRequest *request = [NSMutableURLRequestrequestWithURL:url];
// sign the request with auth user
PF_Twitter *twitter = [PFTwitterUtilstwitter];
[twitter signRequest:request];
// send request
NSURLResponse *response = nil;
NSError *error = nil;
NSData *data = [NSURLConnectionsendSynchronousRequest:request
returningResponse:&response
error:&error];
if( data ) {
// save user info
NSDictionary *jsonObjects = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&error];
}

16. Thanks!