Ways to build REST mobile client

Transcript

1. Ways to build REST mobile client Edwin Kwok Thursday, 27 June, 13
2. iOS Thursday, 27 June, 13
3. Network Manager Network Connection Builder / Factory Network Manager Delegate Rugby Implementation Thursday, 27 June, 13
4. NetworkManager NetworkConnection NewsBuilder NewsViewController<NetworkManagerDelegate> Rugby Implementation 1. ask for News 6. News 2. send request 3. response 4. parse response 5. News Thursday, 27 June, 13
5. WeSnap Implementation ????? Thursday, 27 June, 13
6. RestKit Challenges Offline Data Access Flaky Connectivity Different Data Formats Thursday, 27 June, 13
7. RestKit Features Integrated HTTP Stack Pluggable Parser Object Mapping Core Data Integration UI Integration Thursday, 27 June, 13
8. Integrated HTTP Stack Base URLs Custom Header Network Indicator Performing Requests Background Processing Authentication Request caching Thursday, 27 June, 13
9. Integrated HTTP Stack / / create client RKClient *client = [RKClient clientWithBaseURL:@”http:/ /github.org”]; / / set header [client setValue:[[[UIDevice currentDevice] identifierForVendor] UUIDString] forHTTPHeaderField:@”X-UDID”]; / / set indicator behavior client.requestQueue.showsNetworkActivityIndicatorWhenBusy = YES; Thursday, 27 June, 13
10. Performing Request - (IBAction)forkYouWithBlocks { self.imageView.image = nil; [[RKClient sharedClient] get:@"http:/ /github.com/fluidicon.png" usingBlock:^(RKRequest *request) { [request setBackgroundPolicy:RKRequestBackgroundPolicyContinue]; [request setOnDidLoadResponse:^(RKResponse *response) { if (response.isSuccessful) { UIImage *image = [UIImage imageWithData:response.body]; self.imageView.image = image; } }]; }]; } Thursday, 27 June, 13
11. Background Processing [request setBackgroundPolicy:RKRequestBackgroundPolicyContinue]; RKRequestBackgroundPolicyNone / / do nothing RKRequestBackgroundPolicyCancel / / cancel request RKRequestBackgroundPolicyContinue / / continue RKRequestBackgroundPolicyRequeue / / requeue upon app restart Thursday, 27 June, 13
12. Object Mapping Simple Object Mapping Mapping Relationships Inverse Mappings Serialization Mappings Thursday, 27 June, 13
13. Object mapping { id: 1, name: “Peter”, location: “Hong Kong”, followers: 1, email: “test@example.com”, following: 36 } @interface User : NSObject @property (strong, nonatomic) NSNumber *id; @property (strong, nonatomic) NSString *name; @property (strong, nonatomic) NSString *location; @property (strong, nonatomic) NSNumber *followers; @property (strong, nonatomic) NSString *email; @property (strong, nonatomic) NSNumber *following; @end Thursday, 27 June, 13
14. Object mapping / / register mapping for a class objectMapping = [RKObjectMapping mappingForClass:[User class]]; [objectMapping mapKeyPath:@"id" toAttribute:@"id"]; [objectMapping mapKeyPath:@"name" toAttribute:@"name"]; [objectMapping mapKeyPath:@"location" toAttribute:@"location"]; [objectMapping mapKeyPath:@"email" toAttribute:@"email"]; [objectMapping mapKeyPath:@"following" toAttribute:@"following"]; [objectMapping mapKeyPath:@"followers" toAttribute:@"followers"]; Thursday, 27 June, 13
15. Object mapping [[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWithFormat:@"/users/%@", userName] usingBlock:^(RKObjectLoader *loader) { [SVProgressHUD showWithStatus:@"Loading..."]; [loader setObjectMapping:objectMapping]; [loader setOnDidLoadObject:^(id object) { [SVProgressHUD dismiss]; }]; [loader setOnDidFailWithError:^(NSError *error) { [SVProgressHUD showErrorWithStatus:@"Problem loading user"]; }]; }]; Thursday, 27 June, 13
16. Mapping Relationship RKObjectMapping *userMapping = [RKObjectMapping mappingForClass:[User class]]; RKObjectMapping *issueMapping = [RKObjectMapping mappingForClass:[Issue class]]; / / create relationships [issueMapping mapKeyPath:@"user" toRelationship:@"user" withMapping:userMapping]; { number: 1, title: “Issue #1”, user: { ... } } @interface Issue : NSObject @property (strong, nonatomic) NSNumber *number; @property (strong, nonatomic) NSString *title; @property (strong, nonatomic) User *user; @end Thursday, 27 June, 13
17. Android Thursday, 27 June, 13
18. Thursday, 27 June, 13
19. Problem The operating system may shut down the process Solution: use service Thursday, 27 June, 13
20. Use a Service API Thursday, 27 June, 13
21. Use ContentProvider API Thursday, 27 June, 13
22. Google I/0 2013 Volley: Easy, Fast Networking for Android Thursday, 27 June, 13
23. Why Volley Restful apps have common features: infinite scroll image loading offline caching request priority Volley provides all of them Thursday, 27 June, 13
24. Reference http:/ /www.amazon.com/Test-Driven-iOS- Development-Developers-Library/dp/ 0321774183 http:/ /restkit.org/ https:/ /dl.google.com/googleio/2010/android- developing-RESTful-android-apps.pdf http:/ /www.youtube.com/watch? v=yhv8l9F44qo Thursday, 27 June, 13