• Protocols & Delegates
• Storyboards & Segues
• Navigation Controls
• Table Views
• Gestures
• Photo Library
• Activities
• Data Management

• Create a mutable array that contains the following:
• Name
• Location
• Date
• Output all of the values of the array...
• Manually
• Traditional For Loop
• Fast Enumeration

• Protocol: An interface 
• A promise to implement a list of methods
• Delegate: An object that implements a protocol

• For objects with complex lives (like a text field), Apple uses the delegation pattern.
• "I am your delegate, when something interesting happens in your life, send a message to me"
• "OK, I am done editing" 
• "OK, I am being edited"

- (void) textFieldDidEndEditing:(UITextField *)textField;- (void) textFieldDidBeginEditing:(UITextField *)textField;

• Delegates can also receive queries ...
• "I am about to end editing and hide the keyboard. OK?"

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField;- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField;
- (BOOL)textFieldShouldClear:(UITextField *)textField;
- (BOOL)textFieldShouldReturn:(UITextField *)textField;

1. Know what you have to do

• Check the docs

• Declare delegations in class file

• Implement delegate protocol methods

• Assign an object as the delegate

• Most protocols that we want used are already defined for us in the Foundation Library.
• Sometimes we want to define our own protocols...

// In the interface file (.h)
@protocol ProtocolName<ProtocolToExtend>
@optional
// Your protocols optional methods to implement
@required
// You protocols required methods to implement
@end

// Publicly @interface ClassName : SuperClass <ProtocolName>// OR Privately@interface ClassName () <ProtocolName>

// StreetLegal.h
#import <Foundation/Foundation.h>

@protocol StreetLegal <NSObject>

- (void)signalStop;
- (void)signalLeftTurn;
- (void)signalRightTurn;

@end

 // Bicycle.h
#import <Foundation/Foundation.h>
#import "StreetLegal.h"

@interface Bicycle : NSObject <StreetLegal>

- (void)startPedaling;
- (void)removeFrontWheel;
- (void)lockToStructure:(id)theStructure;

@end

 // Bicycle.m
#import "Bicycle.h"

@implementation Bicycle

- (void)signalStop {
    NSLog(@"Bending left arm downwards");
}
- (void)signalLeftTurn {
    NSLog(@"Extending left arm outwards");
}
- (void)signalRightTurn {
    NSLog(@"Bending left arm upwards");
}
- (void)startPedaling {
    NSLog(@"Here we go!");
}
- (void)removeFrontWheel {
    NSLog(@"Front wheel is off."
          "Should probably replace that before pedaling...");
}
- (void)lockToStructure:(id)theStructure {
    NSLog(@"Locked to structure. Don't forget the combination!");
}

@end

• When referring to an object that implements a protocol, do this:

 @property (nonatomic, strong) id <ProtocolName> myVariable;

 - (void)dexterDidWhine:(Dexter *)dexter {
    NSLog(@"OK sweetie, time for a walk!");
}

- (void)dexterDidPawBowl:(Dexter *)dexter {
    NSLog(@"Aww what's wrong Dexter, would you like a biscuit?");
}

1. Create and define an Objective-C Protocol called "DextersDelgate"

• Required Methods

- (void)dexterDidWhine:(Dexter *)dexter;
- (void)dexterDidPawBowl:(Dexter *)dexter;

 @class Dexter;

 self.delegate

 Alex *alex = [[Alex alloc] init];
 dexter.delegate = alex;

 2014-03-09 21:09:36.323 DexterDelegates[48642:70b] OK Dexter, let's go outside!
2014-03-09 21:09:36.324 DexterDelegates[48642:70b] Here ya go Dexter, here's a biscuit!
2014-03-09 21:09:36.324 DexterDelegates[48642:70b] OK sweetie, time for a walk!
2014-03-09 21:09:36.325 DexterDelegates[48642:70b] Aww what's wrong Dexter, would you like a biscuit?

 if ([whoIsHome isEqualToString:@"Alex"]) {
}

 2014-03-09 21:18:12.665 DexterDelegates[48734:70b] WOOF WOOF!

• A control that can be used to represent multiple items as a list 
• It also provides scrolling capability when the number of items represented is larger than the space provided.
• It's probably the most used UIKit object in the entire iOS ecosystem. 
• There are two types of table views: plain and grouped. 
• A plain table view consists of a single list of items. 
• A grouped table view can have multiple sections, with customizable section headers and footers.

• UITableViewDataSource: What is your data?
• Number of sections
• Number of rows per section
• Table view cell for a row

• UITableViewDelegate: Events & Customizations
• Row got tapped
• Variable height for cells
• Custom header/footer support

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {        // Create a cell (based on a prototype)
    // Populate cell's subview w/ your data        return cell;}