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96 lines
3.9 KiB
96 lines
3.9 KiB
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2014 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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// This app gives a simple example of retrieving data from the foursquare REST API
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// and persisting it in a Realm. To run this app, you will need to provide a foursquare
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// client ID and client secret. To get these, signup at https://developer.foursquare.com/
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#import "AppDelegate.h"
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#import "Venue.h"
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#import <Realm/Realm.h>
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#error Provide your foursquare client ID and client secret
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NSString *clientID = @"YOUR CLIENT ID";
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NSString *clientSecret = @"YOUR CLIENT SECRET";
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@implementation AppDelegate
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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
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{
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self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
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self.window.rootViewController = [[UIViewController alloc] init];
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[self.window makeKeyAndVisible];
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// Ensure we start with an empty database
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[[NSFileManager defaultManager] removeItemAtURL:[RLMRealmConfiguration defaultConfiguration].fileURL error:nil];
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// Query Foursquare API
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NSDictionary *foursquareVenues = [self getFoursquareVenues];
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// Persist the results to Realm
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[self persistToDefaultRealm:foursquareVenues];
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return YES;
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}
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-(NSDictionary*)getFoursquareVenues
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{
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// Call the foursquare API - here we use an NSData method for our API request,
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// but you could use anything that will allow you to call the API and serialize
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// the response as an NSDictionary or NSArray
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NSData *apiResponse = [[NSData alloc] initWithContentsOfURL:
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[NSURL URLWithString:[NSString stringWithFormat:@"https://api.foursquare.com/v2/venues/search?near=San%@Francisco&client_id=%@&client_secret=%@&v=20140101&limit=50", @"%20", clientID, clientSecret]]];
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// Serialize the NSData object from the response into an NSDictionary
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NSDictionary *serializedResponse = [[NSJSONSerialization JSONObjectWithData:apiResponse
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options:kNilOptions
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error:nil]
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objectForKey:@"response"];
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// Extract the venues from the response as an NSDictionary
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return serializedResponse[@"venues"];
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}
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- (void)persistToDefaultRealm:(NSDictionary*)foursquareVenues
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{
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// Open the default Realm file
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RLMRealm *defaultRealm = [RLMRealm defaultRealm];
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// Begin a write transaction to save to the default Realm
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[defaultRealm beginWriteTransaction];
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for (id venue in foursquareVenues) {
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// Store the foursquare venue name and id in a Realm Object
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Venue *newVenue = [[Venue alloc] init];
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newVenue.foursquareID = venue[@"id"];
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newVenue.name = venue[@"name"];
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// Add the Venue object to the default Realm
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// (alternatively you could serialize the API response as an NSArray and call addObjectsFromArray)
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[defaultRealm addObject:newVenue];
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}
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// Persist all the Venues with a single commit
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[defaultRealm commitWriteTransaction];
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// Show all the venues that were persisted
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NSLog(@"Here are all the venues persisted to the default Realm: \n\n %@",
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[[Venue allObjects] description]);
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}
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@end
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