Objective-C Cheat Sheet by Alex Gordon (alextgordon) via cheatography.com/425/cs/198/ Class Interfaces
Class Implementation
Class Use
@interface Shape : NSObject
@implementation Shape
- (void)drawRect:(NSRect)rect {
@property (assign) NSPoint center;
@synthesize centre;
rect = [self bounds];
@property (strong) NSColor* color;
@synthesize color;
[[NSColor cyanColor] set];
@end
- (void)draw {
[NSBezierPath fillRect:rect];
[color set]; @interface Rectangle : Shape
}
Rectangle* rectangle = [[Rectangle alloc] init];
@property (assign) NSSize size;
@end
rectangle.size = NSMakeSize(300, 200);
@end
rectangle.centre = NSMakePoint(NSMidX(rect), @implementation Rectangle
@interface Circle : Shape
@synthesize size;
@property (assign) CGFloat radius;
- (void)draw {
@end
[super draw]; [NSBezierPath fillRect:NSMakeRect(self.centre.x -
NSMidY(rect)); rectangle.color = [NSColor whiteColor]; [rectangle draw];
Circle* circle = [[Circle alloc] init];
size.width / 2, self.centre.y - size.height / 2, size.w
circle.radius = 60;
idth, size.height)];
circle.centre = rectangle.centre;
}
circle.color = [NSColor redColor];
@end
[circle draw]; }
@implementation Circle @synthesize radius;
Result
- (void)draw {
http://chocolatapp.com/snaps/japanflag.png
[super draw]; [[NSBezierPath bezierPathWithOvalInRect:NSMak eRect(self.centre.x - radius, self.centre.y - radius, radius2, radius2)] fill]; } @end Cheatographer
Cheat Sheet
Sponsor
Alex Gordon (alextgordon)
This cheat sheet was published on 10th January,
Envoy, for simple and effective bug management.
cheatography.com/alextgordon/
2012 and was last updated on 10th January, 2012.
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