iOS Einführung am Beispiel von play NEXT TEE einer einfachen Golf-Scoring App fürs iPhone.

1. iOS Einführung am
Beispiel von
play NEXT TEE
Hendrik Ebel (27.08.2012)

2. Themen
•play NEXT TEE Demo
•Objective C 2.0 Überblick
•play NEXT TEE intern
•XCode Best Practice

3. play NEXT TEE Demo
Golfplatzeingabe
simple Golf Runden spielen
Scoring App und Schläge
fürs iPhone dokumentieren
Handicap
Berechnung

4. play NEXT TEE Demo

5. play NEXT TEE Demo

6. Objective C 2.0
• Objective C 2.0 - since Oct 2007 with OS X 10.5
• modern Garbage Collector
• 64 bit
• properties syntax - @synthesize, ...
• Dot-Notation
• Fast Enumeration - „for-in“

7. *.h - Class Structure

8. *.h - Class Structure
#import <UIKit/UIKit.h>
#import "NTEditTournamentViewController.h"
@class NTCourse;
@interface NTStartRoundTableViewController : UITableViewController
<NTEditTournamentViewControllerDelegate>
@property (strong, nonatomic) IBOutlet UITableViewCell *courseCell;
@property (strong, nonatomic) IBOutlet UIBarButtonItem *startButton;
@property (strong, nonatomic) IBOutlet UIBarButtonItem *backButton;
@property (strong, nonatomic) NSMutableArray *selectedTeammates;
@property (strong, nonatomic) NTCourse *selectedCourse;
@property (strong, nonatomic) NSString *selectedTournamentName;
- (IBAction)backAction:(id)sender;
- (IBAction)startAction:(id)sender;
@end

9. *.m - Class Structure
#import "NTEditTournamentViewController.h"
@interface NTStartRoundTableViewController ()
@end
@implementation NTStartRoundTableViewController
@synthesize courseCell;
@synthesize tournamentCell;
- (void)viewDidLoad
{
[super viewDidLoad];
// ..
}
- (void)viewDidUnload
{
// ..
[super viewDidUnload];
}
@end

10. Typs and more
• id - dynamic typing
• BOOL (YES, NO) - bool (true, false)
• NSString, NSNumber, NSDate
• NSArray, NSSet, NSDictionary
• „nil“ - is a null pointer to an Objective-C object.
• „Nil“ - is a null pointer to an Objective-C class.
• „NULL“ - is a null pointer to anything else.

11. Send a message

12. Message examples
- (UIView *)pickerView:(UIPickerView *)pickerView
viewForRow:(NSInteger)row
forComponent:(NSInteger)component
reusingView:(UIView *)view;
- (void)actionSheet:(UIActionSheet *)actionSheet
didDismissWithButtonIndex:(NSInteger)buttonIndex;

13. Properties
// Copy the object during assignment.
@property (copy) MyModelObject *theObject;
// Declare only a getter method.
@property (readonly) NSView *rootView;
// Declare delegate as a weak reference
@property (weak) id delegate;
// Assign new value, change name of getter method
@property (assign, getter=isEnabled) BOOL enabled;
strong = Specifies that there is a strong (owning) relationship to the destination
object.
weak = Specifies that there is a weak (non-owning) relationship to the destination
object. If the destination object is deallocated, the property value is automatically
set to nil. (Weak properties are not supported on OS X v10.6 and iOS 4; use assign
instead.)

14. Dot-Notation vs. [...]
int x = foo.value;
int x = [foo value];
someView.frame.size.width = 30; // This is valid code!
myObject.property = YES;
[myObject setProperty:YES];

15. play NEXT TEE intern
• Config • Bsp. UseCases
• StoryBoards • TableView
• CoreData • Input (Picker, ...)
• UI Controller • WebView
• Delegates • Navigation Seque
Handling
• i18N

16. XCode Best Practice
• Code Completion (kein auto #import)
• Refactoring (auch für StoryBoard)
• StoryBoards (Komplex, XIB Files,
i18n)
• Build and Run (einfach und schnell)
• Developer Account (Hardware Tests
nur für 79 EUR pro Jahr)

17. DANKE!