아이폰 앱 개발 팁(4) : Stanford Lectures #4-5

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> Stanford Lecture #4

* Getters and Setters

- (int)age;

- (void)setAge:(int)age;

* Properties allow access to setters and getters through dot syntax

@property age;

int theAge = person.age;

person.age = 21;

* Various methods of UIApplicationDelegate

- (void)applicationDidFinishLaunching:(UIApplication *)application;

- (void)applicationWillTerminate:(UIApplication *)application;

- (void)applicationWillResignActive:(UIApplication *)application;

- (void)application:(UIApplication *)application handleOpenURL:(NSURL *)url;

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application;

* 3 different flavors of action method selector types

- (void)actionMethod;

- (void)actionMethod:(id)sender;

- (void)actionMethod:(id)sender withEvent:(UIEvent *)event;

* Manual Target-Action

@interface UIControl;

- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;

- (void)removeTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;

@end

> Stanford Lecture #5

* Add/remove views

- (void)addSubview:(UIView *)view;

- (void)removeFromSuperview;

* Manipulate the view hierarchy

- (void)insertSubview:(UIView *)view atIndex:(int)index;

- (void)insertSubview:(UIView *)view belowSubview:(UIView *)view;

- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)view;

- (void)exchangeSubviewAtIndex:(int)index withSubviewAtIndex:(int)otherindex;

* 일시적으로 뷰 감추기

myView.hidden = YES;

* View location

CGPoint(x, y);

* View dimension

CGSize(width, height);

* View location and dimension

CGRect(origin, size);

* Manual view creation

CGRect frame = CGRectMake(20, 45, 140, 21);

UILabel *label = [[UILabel alloc] initWithFrame:frame];

[window addSubview:label];

[label setText:@"Number of sides:"];

[label release];

* Defining custom views

- (void)drawRect:(CGRect)rect;

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;

* When a view needs to be redrawn, use:

- (void)setNeedsDisplay;

[polygonView setNeedsDisplay];

* Access the graphics context within drawRect: by calling

(CGContextRef)UIGraphicsGetCurrentContext(void);

* 색상 설정

UIColor *redColor = [UIColor redColor];

[redColor set];

// [[UIColor redColor] set] 과 동일

* 폰트 설정

UIFont *font = [UIFont systemFontOfSize:14.0];

[myLabel setFont:font];

* 도형 색 채우기

UIRectFill(square);

* 테두리 색 채우기

UIRectFrame(square);

* 이미지 삽입하는 3가지 방법

+ [UIImage imageNamed:(NSString *)name];

- [UIImage initWithContentsOfFile:(NSString *)path];

- [UIImage initWithData:(NSData *)data];

* Bitmap image example

UIGraphicsBeginImageContext(size);

// drawing code...

result = UIGraphicsGetImageFromCurrentContext();

UIGraphicsEndImageContext();

return result;

* Getting image data

NSData *UIImagePNGRepresentation (UIImage *image);

NSData *UIImageJPGRepresentation (UIImage *image);

* Drawing text & images

- [UIImage drawAtPoint:(CGPoint)point);

- [UIImage drawInRect:(CGRect)rect);

- [UIImage drawAsPatternInRect:(CGRect)rect);

- [NSString drawAtPoint:(CGPoint)point withFont:(UIFont *)font];

* View animation example

- (void)showAdvancedOptions {

[UIView beginAnimations:@"advancedAnimations" context:nil];

[UIView setAnimationDuration:0.3];

// make optionsView visible

optionsView.alpha = 1.0;

// move the polygonView down

CGRect polygonFrame = polygonView.frame;

polygonFrame.origin.y += 200;

polygonView.frame = polygonFrame;

[UIView commitAnimations];

}

* View transforms

CGAffineTransformScale(transform, xScale, yScale);

CGAffineTransformRotate(transform, angle);

CGAffineTransformTranslate(transform, xDelta, yDelta);

* Saving state across app launches

+ (NSUserDefaults *)standardUserDefaults;

- (int)integerForKey:(NSString *)key;

- (void)setInteger:(int)value forKey:(NSString *)key;

- (id)objectForKey:(NSString *)key;

- (void)setObject:(id)value forKey:(NSString *)key;