Build and Run

// Get the database (and create it if it doesn’t exist).
NSError *error;
CBLDatabase *database = [[CBLDatabase alloc] initWithName:@"mydb" error:&error];

// Create a new document (i.e. a record) in the database.
CBLMutableDocument *mutableDoc = [[CBLMutableDocument alloc] init];
[mutableDoc setFloat:2.0 forKey:@"version"];
[mutableDoc setString:@"SDK" forKey:@"type"];

// Save it to the database.
[database saveDocument:mutableDoc error:&error];

// Update a document.
CBLMutableDocument *mutableDoc2 = [[database documentWithID:mutableDoc.id] toMutable];
[mutableDoc2 setString:@"Swift" forKey:@"language"];
[database saveDocument:mutableDoc2 error:&error];

CBLDocument *document = [database documentWithID:mutableDoc2.id];
// Log the document ID (generated by the database)
// and properties
NSLog(@"Document ID :: %@", document.id);
NSLog(@"Learning %@", [document stringForKey:@"language"]);

// Create a query to fetch documents of type SDK.
CBLQueryExpression *type = [[CBLQueryExpression property:@"type"] equalTo:[CBLQueryExpression string:@"SDK"]];
CBLQuery *query = [CBLQueryBuilder select:@[[CBLQuerySelectResult all]]
                                      from:[CBLQueryDataSource database:database]
                                     where:type];

// Run the query
CBLQueryResultSet *result = [query execute:&error];
NSLog(@"Number of rows :: %lu", (unsigned long)[[result allResults] count]);

// Create replicators to push and pull changes to and from the cloud.
NSURL *url = [[NSURL alloc] initWithString:@"ws://localhost:4984/getting-started-db"];
CBLURLEndpoint *targetEndpoint = [[CBLURLEndpoint alloc] initWithURL:url];
CBLReplicatorConfiguration *replConfig = [[CBLReplicatorConfiguration alloc] initWithDatabase:database target:targetEndpoint];
replConfig.replicatorType = kCBLReplicatorTypePushAndPull;

// Add authentication.
replConfig.authenticator = [[CBLBasicAuthenticator alloc] initWithUsername:@"john" password:@"pass"];

// Create replicator (make sure to add an instance or static variable named _replicator)
_replicator = [[CBLReplicator alloc] initWithConfig:replConfig];

// Listen to replicator change events.
[_replicator addChangeListener:^(CBLReplicatorChange *change) {
    if (change.status.error) {
        NSLog(@"Error code: %ld", change.status.error.code);
    }
}];

// Start replication
[_replicator start];

<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key><true/>
</dict>