Beginning iPhone Application Development

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Shao-Chung, Chen Dannvix [at] gmail.com VIPLab @ CSIE, NTNU December 2, 2010 S.C. Chen @ VIPLab 1

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• – December 2, 2010 S.C. Chen @ VIPLab 2

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December 2, 2010 S.C. Chen @ VIPLab 3

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December 2, 2010 S.C. Chen @ VIPLab 4 

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• • • • December 2, 2010 S.C. Chen @ VIPLab 5

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• – • – • – • – December 2, 2010 S.C. Chen @ VIPLab 6

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• • • • • • December 2, 2010 S.C. Chen @ VIPLab 10

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• – – • – • – – • December 2, 2010 S.C. Chen @ VIPLab 11

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December 2, 2010 S.C. Chen @ VIPLab 12 main() main.m MyAppDelegate.h MyAppDelegate.m MyViewController.h MyViewController.m MyViewController.xib

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December 2, 2010 S.C. Chen @ VIPLab 13 int main (int agrc, char* argv[]) { NSAutoReleasePool *pool = [[NSAutoReleasePool alloc] init]; int retval = UIApplication( argc, argv, nil, @“MyAppDelegate"); [pool release]; return retval; }

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December 2, 2010 S.C. Chen @ VIPLab 14 int main (int agrc, char* argv[]) { NSAutoReleasePool *pool = [[NSAutoReleasePool alloc] init]; int retval = UIApplication( argc, argv, nil, @“MyAppDelegate"); [pool release]; return retval; }

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December 2, 2010 S.C. Chen @ VIPLab 15 int main (int agrc, char* argv[]) { NSAutoReleasePool *pool = [[NSAutoReleasePool alloc] init]; int retval = UIApplication( argc, argv, nil, @“MyAppDelegate"); [pool release]; return retval; }

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December 2, 2010 S.C. Chen @ VIPLab 16

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• – • – myobj->setA(3); – [myobj setA: 3]; • • December 2, 2010 S.C. Chen @ VIPLab 17

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• – @ @"Foo“ – printf("%s %@", "Foo", @"Bar"); • – NSArray *colors = [NSArray arrayWithObjects: @"Black", @"Gray", nil]; for (NSString *color in colors) printf("a %@ car\n", color); December 2, 2010 S.C. Chen @ VIPLab 18

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• new delete – –  • – • BOOL TRUE YES FALSE NO December 2, 2010 S.C. Chen @ VIPLab 19

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• • http://www.mactech.com/articles/mactech/V ol.13/13.03/CandObjectiveCCompared/ December 2, 2010 S.C. Chen @ VIPLab 20

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@interface December 2, 2010 S.C. Chen @ VIPLab 21 #import @interface Car : NSObject { int year; NSString *make; NSString *model; } - (void) setMake:(NSString *) aMake andModel:(NSString *) aModel andYear:(int) Year; - (void) printCarInfo; - (int) year; @end

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December 2, 2010 S.C. Chen @ VIPLab 22 • void setProperties(char *c1, char *c2, int i); myCar->setProperties("Foo", "Bar", 5566); • - (void) setMake:(NSString *) aMake andModel:(NSString *) aModel andYear:(int) year; [myCar setMake:@"Foo" andModel:@"Bar", andYear:5566]; setProperties() setMake:andModel:andYear:

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December 2, 2010 S.C. Chen @ VIPLab 23 NSArray *anotherArray = [NSMutableArray array]; // addObject: is a mutable-only method [anotherArray addObject: @"Hello World"]; 1) NSArray *myArray = [NSArray array]; 2) NSMutableArray *mutableArray; 3) mutableArray = myArray; 4) [mutableArray addObject: @"Hello World"]; Produces a compile-time warning, but works fine Line #3 produces a compile-time warning, Line #4 will BOMB at run-time

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@implementation December 2, 2010 S.C. Chen @ VIPLab 24 #import "Car.h" @implementation - (id) init { self = [super init]; if (!self) return nil; make = model = nil, year = 1901; return self; } - (void) setMake:(NSString *) aMake andModel: (NSString *) aModel andYear:(int) year { make = [NSString stringWithString: aMake]; model = [NSString stringWithString aModel]; year = aYear; }

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@implementation December 2, 2010 S.C. Chen @ VIPLab 25 #import "Car.h" @implementation - (id) init { self = [super init]; if (!self) return nil; make = model = nil, year = 1901; return self; } - (void) setMake:(NSString *) aMake andModel: (NSString *) aModel andYear:(int) year { make = [NSString stringWithString: aMake]; model = [NSString stringWithString aModel]; year = aYear; }

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• – • Car *myCar = [Car car]; • [myCar printCarInfo]; – - • - (void) printCarInfo() • – • [[Car alloc] init]; – + • + (void) init { super[init]; return init; } December 2, 2010 S.C. Chen @ VIPLab 26

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• – NSObject • – – – • super December 2, 2010 S.C. Chen @ VIPLab 27

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December 2, 2010 S.C. Chen @ VIPLab 28 NSObject NSArray NSString UIResponder UIView UILabel UIControl UISlider UITextFied

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• • NSLog() – NSLog(@"Current Make: %@\n", make); – 2010-12-02 12:05:23.784 HelloWorld[11197:20b] Current Make: VIPLab • CFShow() stderr – CFShow(make); – December 2, 2010 S.C. Chen @ VIPLab 29

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• – Car *car = [[Car alloc] init]; – Car *car = [[[Car alloc] init] autorelease]; – Car *car = [Car car]; • + (Car *) car { return [[[Car alloc] init] autorelease]; } • December 2, 2010 S.C. Chen @ VIPLab 32

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• – • – – – • http://osxchat.blogspot.com/2005/05/objecti ve-ccocoa.html – December 2, 2010 S.C. Chen @ VIPLab 33

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retainCount December 2, 2010 S.C. Chen @ VIPLab 34 unsigned rc = [myCar retainCount];

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retain release release dealloc December 2, 2010 S.C. Chen @ VIPLab 35 retain release

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init* December 2, 2010 S.C. Chen @ VIPLab 36 init* Car *myCar = [[Car alloc] init];

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NSString +stringWithUTF8String - stringByAppendingString retain December 2, 2010 S.C. Chen @ VIPLab 37 retain

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init* retain dealloc December 2, 2010 S.C. Chen @ VIPLab 38 retain

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December 2, 2010 S.C. Chen @ VIPLab 39 @interface Foo : NSObject { NSString *m_name; } - (id) initWithName:(NSString *) name; @end

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December 2, 2010 S.C. Chen @ VIPLab 40 @implementation Foo { - (id) initWithName:(NSString *) name { self = [super init]; if (!self) return nil; m_name = name; [m_name retain]; return self; } - (void) dealloc { [m_name release]; [super dealloc]; } }

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release [pool release] release December 2, 2010 S.C. Chen @ VIPLab 41

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retain NSString NSData NSURL December 2, 2010 S.C. Chen @ VIPLab 42

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December 2, 2010 S.C. Chen @ VIPLab 43 int bar (const char *p) { NSString *q = [[NSString alloc] initWithUTF8String: p]; if (SOME_ERROR_OCCURS) { [q release]; return -1; } // ... if (ANOTHER_ERROR_OCCURS) { [q release]; return -1; } [q release]; return 0; } init*

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December 2, 2010 S.C. Chen @ VIPLab 44 int bar (const char *p) { NSString *q = [NSString stringWithUTF8String:p]; if (SOME_ERROR_OCCURS) { return -1; } // ... if (ANOTHER_ERROR_OCCURS) { return -1; } return 0; }

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• • release – dealloc – retain December 2, 2010 S.C. Chen @ VIPLab 45

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@property • @property • – @property NSString *make; • – @property (retain) NSString *make; • retain – @property (copy) NSString *make; • – @property (readonly) NSString *make; • December 2, 2010 S.C. Chen @ VIPLab 46

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@property @interface Person : NSObject { NSString *name; } @property (copy) NSString *name; @end @implementation Person @synthesize name; // ... @end December 2, 2010 S.C. Chen @ VIPLab 47

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• • December 2, 2010 S.C. Chen @ VIPLab 48

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@interface MyDelegate : NSObject { } - (BOOL) applicationShouldTerminateAfterLastWindowClosed: (NSApplication *) theApplication; - (BOOL) windowShouldClose:(id) window; @end December 2, 2010 S.C. Chen @ VIPLab 49

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@implementation MyDelegate - (BOOL) applicationShouldTerminateAfterLastWindowClosed: (NSApplication *) theApplication: { return YES; } - (BOOL) windowShouldClose:(id) window { NSAlert *alert = [[NSAlert alloc] init]; // ... show an alert and get the users’ response if (result == NSAlertFirstButtonReturn) { /* ... */} [alert release]; return NO; } @end December 2, 2010 S.C. Chen @ VIPLab 50

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• MyDelegate NSApplication NSWindow • December 2, 2010 S.C. Chen @ VIPLab 51

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@protocol • – • •  December 2, 2010 S.C. Chen @ VIPLab 52

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• NSString NSURL NSNumber NSDate NSTimer NSArray NSDictionary NSData • – NSArray NSMutableArray • December 2, 2010 S.C. Chen @ VIPLab 53

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December 2, 2010 S.C. Chen @ VIPLab 55 /Developer/Application/Xcode.app

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• • – • – • • https://gist.github.com/724673 December 2, 2010 S.C. Chen @ VIPLab 65

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• • December 2, 2010 S.C. Chen @ VIPLab 67

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• – UITextView – UILabel – UIImageView – UIWebView – MKMapView • MKAnnoatationView MKPinAnnoationView – UIScrollView December 2, 2010 S.C. Chen @ VIPLab 71