Techfest 2013 No RESTKit for the Weary
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The document provides a detailed guide on using RestKit, a framework for interacting with RESTful web services in iOS and OS X. It covers setup instructions, how to make API calls, handle JSON responses, and manage data mapping using Core Data. Also included are code snippets for common tasks such as GET and POST requests with error handling.
![rvice Calls on iOS
Web Se
Define your URL
NSString *url = @”http://somewebservice.com/objects.json”;
Make the Call
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
ese delegate methods!!!
Then implement all of th
-
(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
(void)connectionDidFinishLoading:(NSURLConnection *)connection
and now you have to parse
the JSON in NSData
into something useful...
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-3-320.jpg)
![n is great, but...
NSJSONSerializatio
-(void) parseJSONIntoModel:(NSData *) jsonData {
NSError *error = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:jsonData
options:NSJSONReadingAllowFragments
error:&error];
if (error!=nil) {
// TODO: Insert annoying JSON error handler here.
}
if ([json isKindOfClass:[NSArray class]]) {
//TODO: Uh. I was expecting a dictionary but apparently this is an array. Writng some handling code here.
}
for(NSString *key in [json allKeys]) {
if ([key isEqualToString:@"user"]) {
NSDictionary *userDictionary = [json objectForKey:key];
NSNumber *userId = [userDictionary objectForKey:@"id"];
RKGUser *user = [[ObjectFactory sharedFactory] userForUserId:userId];
if (user==nil) {
user = [[ObjectFactory sharedFactory] newUser];
user.userId=useriD;
}
}
.
.
.
user.name = [userDictionary objectForKey:@"name"];
user.username = [userDictionary objectForKey:@"username"];
user.phone = [userDictionary objectForKey:@"phone"];
user.email = [userDictionary objectForKey:@"email"];
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-4-320.jpg)
![[[RKObjectManager sharedManager] getObjectsAtPath:@"objects.json"
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
// Call is successful. Objects are all populated.
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
// Call failed.
}];
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-6-320.jpg)
![Using RestKit: The Setup
-(void) setupRestKit {
RKObjectManager *objectManager =
[RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://api.icndb.com/"]];
objectManager.requestSerializationMIMEType=RKMIMETypeJSON;
[RKObjectManager setSharedManager:objectManager];
.
.
.
eps for CoreData, authentication, etc.)
(There are a few extra st
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-11-320.jpg)
![Using RestKit: The Mappin
g
RKObjectMapping *jokeMapping = [RKObjectMapping mappingForClass:[Joke class]];
[jokeMapping addAttributeMappingsFromDictionary:@{
@"id":
@"joke":
@"jokeId",
@"text"}];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor
responseDescriptorWithMapping:jokeMapping
method:RKRequestMethodGET
pathPattern:@"jokes"
keyPath:@"value"
statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[[RKObjectManager sharedManager] addResponseDescriptor:responseDescriptor];
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-12-320.jpg)
![Using RestKit: The Call
[[RKObjectManager sharedManager] getObjectsAtPath:@"jokes"
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
self.jokes = mappingResult.array;
[self.tableView reloadData];
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
[self displayError:error];
}];
RKMappingResult has
count,firstObject, array,
dictionary,
and set properties
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-14-320.jpg)
![Using RestKit: The Mappin
gf
or POST
RKObjectMapping *inverseJokeMapping = [jokeMapping inverseMapping];
RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor
requestDescriptorWithMapping:inverseJokeMapping
objectClass:[Joke class]
rootKeyPath:@"jokes"
method:RKRequestMethodPOST ];
[[RKObjectManager sharedManager] addRequestDescriptor:requestDescriptor];
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-15-320.jpg)
![it: POSTing
Using RestK
Joke *aJoke=[[Joke alloc] init];
aJoke.jokeId=@9999;
aJoke.text=@"Chuck Norris can find the end of a circle.";
[[RKObjectManager sharedManager] postObject:aJoke
path:@"jokes"
parameters:nil
success:^(RKObjectRequestOperation *operation,
RKMappingResult *mappingResult){}
failure:^(RKObjectRequestOperation *operation,
NSError *error){}];
Tuesday, January 28, 14](https://image.slidesharecdn.com/techfest2013-restkit-140128143120-phpapp01/85/Techfest-2013-No-RESTKit-for-the-Weary-16-320.jpg)
Techfest 2013 No RESTKit for the Weary
- 1. or the Weary No RestKit f Matt Galloway Architactile [email protected] 918-808-3072 Tuesday, January 28, 14
- 2. Some Amazingly Cool Data from the “Cloud” ul* Web RESTF es Servic the “Cloud” REST-ish and JSONy. ul,“ of course, I mean * By “RESTF Tuesday, January 28, 14
- 3. rvice Calls on iOS Web Se Define your URL NSString *url = @”http://somewebservice.com/objects.json”; Make the Call NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; [[NSURLConnection alloc] initWithRequest:request delegate:self]; ese delegate methods!!! Then implement all of th - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error (void)connectionDidFinishLoading:(NSURLConnection *)connection and now you have to parse the JSON in NSData into something useful... Tuesday, January 28, 14
- 4. n is great, but... NSJSONSerializatio -(void) parseJSONIntoModel:(NSData *) jsonData { NSError *error = nil; NSDictionary *json = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&error]; if (error!=nil) { // TODO: Insert annoying JSON error handler here. } if ([json isKindOfClass:[NSArray class]]) { //TODO: Uh. I was expecting a dictionary but apparently this is an array. Writng some handling code here. } for(NSString *key in [json allKeys]) { if ([key isEqualToString:@"user"]) { NSDictionary *userDictionary = [json objectForKey:key]; NSNumber *userId = [userDictionary objectForKey:@"id"]; RKGUser *user = [[ObjectFactory sharedFactory] userForUserId:userId]; if (user==nil) { user = [[ObjectFactory sharedFactory] newUser]; user.userId=useriD; } } . . . user.name = [userDictionary objectForKey:@"name"]; user.username = [userDictionary objectForKey:@"username"]; user.phone = [userDictionary objectForKey:@"phone"]; user.email = [userDictionary objectForKey:@"email"]; Tuesday, January 28, 14
- 5. nter RestKit E https://github.com/RestK it /RestKit/ ing and modeling ework for consum RestKit is a fram s on iOS and OS X Tful web resource RES Tuesday, January 28, 14
- 6. [[RKObjectManager sharedManager] getObjectsAtPath:@"objects.json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { // Call is successful. Objects are all populated. } failure:^(RKObjectRequestOperation *operation, NSError *error) { // Call failed. }]; Tuesday, January 28, 14
- 7. RestKit is... rce & available on GitHub * Open Sou * Built on AFNetworking Beautifully multi-threaded * eamlessly with CoreData * Integrates s o works with plain objects * Als lationships, nesting, etc. * Handles re on mapping like an ORM * Based * Very configurable , POST, PATCH, etc. ndles all REST verbs - GET * Ha y actively maintained * Ver ase seeding, search, ch of other stuff - datab * A bu n XML, etc. Tuesday, January 28, 14
- 8. ing RestKit Install I <3 CocoaPods $ cd /path/to/MyProject $ touch Podfile $ edit Podfile platform :ios, '5.0' # Or platform :osx, '10.7' pod 'RestKit', '~> 0.20.0' $ pod install $ open MyProject.xcworkspace Tuesday, January 28, 14
- 9. Using RestKit: The W e Tuesday, January 28, 14 b Service
- 10. Using RestKit: The Object @interface Joke : NSObject @property (nonatomic, strong) NSNumber *jokeId; @property (nonatomic, strong) NSString *text; @end @implementation Joke @end Tuesday, January 28, 14
- 11. Using RestKit: The Setup -(void) setupRestKit { RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://api.icndb.com/"]]; objectManager.requestSerializationMIMEType=RKMIMETypeJSON; [RKObjectManager setSharedManager:objectManager]; . . . eps for CoreData, authentication, etc.) (There are a few extra st Tuesday, January 28, 14
- 12. Using RestKit: The Mappin g RKObjectMapping *jokeMapping = [RKObjectMapping mappingForClass:[Joke class]]; [jokeMapping addAttributeMappingsFromDictionary:@{ @"id": @"joke": @"jokeId", @"text"}]; RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:jokeMapping method:RKRequestMethodGET pathPattern:@"jokes" keyPath:@"value" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; [[RKObjectManager sharedManager] addResponseDescriptor:responseDescriptor]; Tuesday, January 28, 14
- 13. I <3 Singletons a singleton, so KObjectManager is R apping steps need the setup and m e, usually at app only be done onc launch. it and forget it. :) Se t Tuesday, January 28, 14
- 14. Using RestKit: The Call [[RKObjectManager sharedManager] getObjectsAtPath:@"jokes" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { self.jokes = mappingResult.array; [self.tableView reloadData]; } failure:^(RKObjectRequestOperation *operation, NSError *error) { [self displayError:error]; }]; RKMappingResult has count,firstObject, array, dictionary, and set properties Tuesday, January 28, 14
- 15. Using RestKit: The Mappin gf or POST RKObjectMapping *inverseJokeMapping = [jokeMapping inverseMapping]; RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:inverseJokeMapping objectClass:[Joke class] rootKeyPath:@"jokes" method:RKRequestMethodPOST ]; [[RKObjectManager sharedManager] addRequestDescriptor:requestDescriptor]; Tuesday, January 28, 14
- 16. it: POSTing Using RestK Joke *aJoke=[[Joke alloc] init]; aJoke.jokeId=@9999; aJoke.text=@"Chuck Norris can find the end of a circle."; [[RKObjectManager sharedManager] postObject:aJoke path:@"jokes" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult){} failure:^(RKObjectRequestOperation *operation, NSError *error){}]; Tuesday, January 28, 14
- 17. ome Demos S Tuesday, January 28, 14