Introduction to Parse

May 1, 2012Download as key, pdf

2 likes2,123 views

This document provides an introduction and overview of Parse, covering key features and capabilities including: 1) Why Parse is useful for app development by focusing on the app, being cheap, and requiring a different skill set than backend development. 2) Key data aspects of Parse including powerful querying, associations between objects, support for large files, and access control. 3) Examples of basic usage like creating, querying, and saving Parse objects. 4) Additional features like support for users and authentication, storage and retrieval of files including images, location-based queries and storage, and push notifications.

Abey
Mullassery
Internet & Mobile
Developer

Why?

• Focus on the app
• Cheap enough
• Different skill set
• Export/Import

Why not

• Backend Computation
• Complex data model
• 3rd party services

Data

• Powerful query
• Associations
• Big File
• Access Control

// Create a new Parse object
PFObject *post = [PFObject objectWithClassName:@"Post"];
[post setObject:@"Hello World" forKey:@"title"];
[post setObject:user forKey:@"author"];

// Save it to Parse
[post saveEventually];

[user setObject incrementKey:@"posts"];
[user saveEventually];

PFQuery *query = [PFQuery queryWithClassName:@"Posts"];
[query whereKey:@"author_name" equalTo:@"Abey Mullassery"];
NSArray* posts = [query findObjects];

NSData *data = UIImageJPEGRepresentation(image, 0.60);
PFFile *file = [PFFile fileWithName:@"photo.jpg"
data:data];
[file saveInBackground];

$// Initialize the user object PFUser *user = [PFUser user]; user.username = @"abey"; user.password = @"N0th1ngM@tters"; [user signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if (!error) { // Hooray! Let them use the app now. } else { NSString *errorString = [[error userInfo] objectForKey:@"error"]; // Show the error and let the user try again. } }];$

Location

• Built-in class
• Spatial search

PFGeoPoint *point = [PFGeoPoint geoPointWithLatitude:
40.0 longitude:-30.0];
[user setObject:point forKey:@"location"];
[user saveInBackground];

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Introduction to Parse

3. Introduction to Parse

5. Abey Mullassery Internet & Mobile Developer

6. Why?

7. Why? • Focus on the app • Cheap enough • Different skill set • Export/Import

8. Why not

9. Why not • Backend Computation • Complex data model • 3rd party services

11. iOS, Android & REST

12. Data

13. Data • Powerful query • Associations • Big File • Access Control

15. // Create a new Parse object PFObject *post = [PFObject objectWithClassName:@"Post"]; [post setObject:@"Hello World" forKey:@"title"]; [post setObject:user forKey:@"author"]; // Save it to Parse [post saveEventually]; [user setObject incrementKey:@"posts"]; [user saveEventually]; PFQuery *query = [PFQuery queryWithClassName:@"Posts"]; [query whereKey:@"author_name" equalTo:@"Abey Mullassery"]; NSArray* posts = [query findObjects];

17. NSData *data = UIImageJPEGRepresentation(image, 0.60); PFFile *file = [PFFile fileWithName:@"photo.jpg" data:data]; [file saveInBackground];

18. Users

19. Users • Sign up and Login Interface • Facebook & Twitter • Password reset • Email veriﬁcation

21. // Initialize the user object PFUser *user = [PFUser user]; user.username = @"abey"; user.password = @"N0th1ngM@tters"; [user signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if (!error) { // Hooray! Let them use the app now. } else { NSString *errorString = [[error userInfo] objectForKey:@"error"]; // Show the error and let the user try again. } }];

22. Location

23. Location • Built-in class • Spatial search

25. PFGeoPoint *point = [PFGeoPoint geoPointWithLatitude: 40.0 longitude:-30.0]; [user setObject:point forKey:@"location"]; [user saveInBackground];

26. Push Notiﬁcations

27. Push Notiﬁcations • Send from app • Subscribe to Channels • Send to Channels

29. // Subscribe to a push channel [PFPush subscribeToChannelInBackground:@"new_users"]; // Push to the channel from the client [PFPush sendPushMessageToChannelInBackground:@"new_users" withMessage:@"A new user signed up!"];

31. Questions?

33. Thank you

Editor's Notes

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Introduction to Parse

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Editor's Notes