The document outlines topics for an advanced iOS training, including using custom delegates and protocols, saving and restoring application state, making network requests using NSURLConnection, populating data in tables, and deploying apps on devices. Key points covered are defining and conforming to protocols, preserving and restoring app state across launches, making asynchronous and synchronous network requests, and the steps required to deploy apps to physical iOS devices for testing.

1. iOS Training
(Advanced)
Gurpreet Singh
Sriram Viswanathan
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2. Topics
 Using custom delegate and protocols
 Saving and Restoring the Application State
 Introduction to NSURLConnection
 Hands on example for
 Fetching data from server
 Using Table View Controller
 Populating Data in a Table
 Refreshing Data
 Deploying your app on a device
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3. Using custom delegate and protocols
Defining Protocol
@protocol DataConsumerDelegate
// Method to handle response of the rest connection call
- (void) finishedReceivingData: (NSData *) data;
@end
Conforming to protocol
@interface MyDataConsumer : NSObject <DataConsumerDelegate>
@end
@implementation MyDataConsumer
- (void) finishedReceivingData: (NSData *) data {
// HANDLE THE DATA
}
@end
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4. Using custom delegate and protocols
Using delegate
@interface AsynchronousRestConnection : NSObject {
id<DataConsumerDelegate> dataConsumerDelegate;
}
// Used to store delgate object (it must conform to DataConsumerDelegateprotocol)
@property (nonatomic, weak) id<DataConsumerDelegate> dataConsumerDelegate;
- (void) getData;
@end
@implementation AsynchronousRestConnection
@synthesize dataConsumerDelegate;
- (void) getData {
// GET DATA AND STORE IT IN data
// YOU CAN DO MULTI QUERY AND MERGE OUTPUT
[self.dataConsumerDelegate finishedReceivingData:data];
}
@end
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5. Using custom delegate and protocols
Updating the MyDataConsumer class to use AsynchronousRestConnection
@interface MyDataConsumer : NSObject <DataConsumerDelegate>
- (void) getDataFromApi;
@end
@implementation MyDataConsumer
- (void) finishedReceivingData: (NSData *) data {
// HANDLE THE DATA
}
- (void) getDataFromApi {
AsynchronousRestConnection *arc = [[AsynchronousRestConnection alloc] init];
arc.dataConsumerDelegate = self;
// CONSUME DATA
}
@end
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6. Topics
 Using custom delegate and protocols
 Saving and Restoring the Application State
 Introduction to NSURLConnection
 Hands on example for
 Fetching data from server
 Using Table View Controller
 Populating Data in a Table
 Refreshing Data
 Deploying your app on a device
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7. Saving and Restoring Application State
During the preservation and restoration process, your app has a handful of
responsibilities.
During preservation, your app is responsible for:
 Telling UIKit that it supports state preservation.
 Telling UIKit which view controllers and views should be preserved.
 Encoding relevant data for any preserved objects.
During restoration, your app is responsible for:
 Telling UIKit that it supports state restoration.
 Providing (or creating) the objects that are requested by UIKit.
 Decoding the state of your preserved objects and using it to return the
object to its previous state.
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8. Saving and Restoring Application State
High-level flow interface preservation
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9. Saving and Restoring Application State
High-level flow for restoring your user interface
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10. Topics
 Using custom delegate and protocols
 Saving and Restoring the Application State
 Introduction to NSURLConnection
 Hands on example for
 Fetching data from server
 Using Table View Controller
 Populating Data in a Table
 Refreshing Data
 Deploying your app on a device
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11. Introduction to NSURLConnection
 Asynchronous Request
 Synchronous Request
 POST request
 Using Connection Timeout
 Cache Policies
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12. Asynchronous Request
To fetch some data, we’ll follow these 3 basic steps:
 Have our class conform to the NSURLConnectionDelegate protocol and
declare a var to store the response data
 Implement the NSURLConnectionDelegate protocol methods
 Create an instance of NSURLRequest and NSURLConnection to kick off
the request
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13. Asynchronous Request
Step 1:
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14. Asynchronous Request
Step 2:
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15. Asynchronous Request
Step 3:
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16. Asynchronous Request
Step 4:
 First connection:didReceiveResponse will be hit, indicating that the server
has responded.
 Then the handler, connection:didReceiveData: will be hit several times.
 This is where you’ll append the latest data to the response data variable
you declared in Step 1.
 Then finally, connectionDidFinishLoading: will be hit and you can parse
the response data variable.
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17. POST Request
A synchronous request looks like the below:
 You’ll set the HTTPMethod property to POST
 You’ll assign the header fields and value in the body
 Ensure that you’re using an instance of NSMutableURLRequest because
NSURLRequest is immutable.
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18. Using Connection Timeout
Using Connection Timeout

If you want to set a timeout for your data retrieval, you can set the timeoutInterval
property of your NSURLRequest.

Ensure that you’re using an instance of NSMutableURLRequest because
NSURLRequest is immutable.
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19. Cache Policies
To specify how your data should be cached locally, you can set a cache
policy with your NSURLRequest.
Following snippet shows you how you can define a cache policy and a
timeout.
 If you don’t specify any caching policy with your NSURLRequest, then it
will try to conform to whatever the protocol states.
 For example, with HTTP it will look at the server response headers and try
to conform to what it dictates about caching.
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20. Topics
 Using custom delegate and protocols
 Saving and Restoring the Application State
 Introduction to NSURLConnection
 Hands on example for
 Fetching data from server
 Using Table View Controller
 Populating Data in a Table
 Refreshing Data
 Deploying your app on a device
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21. Topics
 Using custom delegate and protocols
 Saving and Restoring the Application State
 Introduction to NSURLConnection
 Hands on example for
 Fetching data from server
 Using Table View Controller
 Populating Data in a Table
 Refreshing Data
 Deploying your app on a device
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22. Deploying your app on a device
Steps to deploy your app on a device
Step 1: iOS Developer Program (iPhone provision portal)
Step 2: Create a Certificate Signing Request
Step 3: Create a Development Certificate
Step 4: Adding a Device
Step 5: Create an App ID
Step 6: Create a Provisioning Profile
Step 7: Configuring the Project
Step 8: Build and Run
For detail refer:
http://mobile.tutsplus.com/tutorials/iphone/how-to-test-your-apps-on-physical-iosdevices/
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