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#include <Foundation/Foundation.h>
#include <objc/Object.h>
#include <objc/objc.h>
#include <stdio.h>
@interface Hello : NSObject
+ (instancetype)new;
- (void)sayHello;
@end
@implementation Hello
+ (instancetype)new {
return [[self alloc] init];
}
- (void)sayHello {
printf("Hello from Objective-C!\n");
}
@end
@interface ExtendedHello: Hello
- (void)sayHello;
- (void)baldNiko;
@end
@implementation ExtendedHello
- (void)baldNiko {
printf("67 67 bald niko 67\n");
}
- (void)sayHello {
[super sayHello];
[self baldNiko];
}
@end
@interface DoubleExtendedHello: ExtendedHello
- (void)baldNiko;
@end
@implementation DoubleExtendedHello
- (void)baldNiko {
printf("bald niko with CHEESE !!!\n");
}
@end
@interface Player : NSObject {
int x;
int y;
NSString *name;
}
- (instancetype)init;
- (void)setX:(int)x;
- (void)setY:(int)y;
- (void)setName:(NSString *)name;
- (void)sayHi;
+ (int)playerCount;
@end
@implementation Player
static int playerCount = 0;
- (instancetype)init {
self = [super init];
if (self) {
x = 0;
y = 0;
name = @"Player";
playerCount++;
}
return self;
}
- (void)setX:(int)val {
x = val;
}
- (void)setY:(int)val {
y = val;
}
- (void)setName:(NSString *)val {
name = val;
}
- (void)sayHi {
printf("Hello, I'm %s, and I am at X: %d, Y: %d!\n", [name UTF8String], x, y);
}
+ (int)playerCount {
return playerCount;
}
@end
@interface PlayerObserver : NSObject
@end
@implementation PlayerObserver
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void*)context {
NSLog(@"PlayerObserver: %@ changed!", keyPath);
NSLog(@"Old: %@", [change objectForKey:NSKeyValueChangeOldKey]);
NSLog(@"New: %@", [change objectForKey:NSKeyValueChangeNewKey]);
}
@end
int main(void) {
@autoreleasepool {
Hello *hello = [Hello new];
[hello sayHello];
NSString *string = @"Test\n";
NSLog(@"%@", string);
ExtendedHello *ehello = [ExtendedHello new];
[ehello sayHello];
DoubleExtendedHello *dehello = [DoubleExtendedHello new];
[dehello sayHello];
Player *player = [Player new];
[player setName:@"John Hackclub"];
[player setX:27];
[player setY:538];
[player sayHi];
printf("player count: %d\n", [Player playerCount]);
Player *player2 = [Player new];
[player2 setName:@"French Hacker"];
[player2 setX:67];
[player2 setY:41];
[player2 sayHi];
printf("player count: %d\n", [Player playerCount]);
NSArray *people = @[
@"John Smith",
@"Jane Doe",
@"John Hackclub",
@"French Hacker",
@"Zach Latta"
];
NSLog(@"%@", people);
NSArray *players = @[
@{@"name": @"French Hacker", @"score": @538},
@{@"name": @"Arslaan", @"score": @53827},
@{@"name": @"John Hackclub", @"score": @120}
];
NSPredicate *highScore = [NSPredicate predicateWithFormat:@"score > 300"];
NSArray *filtered = [players filteredArrayUsingPredicate:highScore];
NSLog(@"All players: %@", players);
NSLog(@"High scorers (score > 300): %@", filtered);
Player *player3 = [Player new];
PlayerObserver *observer = [PlayerObserver new];
[player3 addObserver:observer forKeyPath:@"name" options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew context:NULL];
[player3 setName:@"Arslaan"];
[player3 setName:@"Arslaan Pathan"];
[player3 removeObserver:observer forKeyPath:@"name" context:NULL];
[player release];
[player2 release];
[observer release];
[player3 release];
[hello release];
[ehello release];
[dehello release];
return 0;
}
}
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