아이폰 앱 개발 팁(1) : Stanford Lecture #2

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> Stanford Lecture #2

* 특정 포맷의 문자열 작성

NSString *aString = @"Cool";

NSString *myString = [NSString stringWithFormat:@"It's '%@'", aString];

* 문자열 수정

- (NSString *)stringByAppendingString:(NSString *)string;

- (NSString *)stringByAppendingFormat:(NSString *)string;

- (NSString *)stringByDeletingPathComponent;

NSString *myString = @"Hello";

NSString *fullString;

fullString = [myString stringByAppendingString:@" world!"]; // Hello world!

* 유용 NSString methods

- (BOOL)isEqualToString:(NSString *)string;

- (BOOL)hasPrefix:(NSString *)string;

- (int)intValue;

- (double)doubleValue;

* 유용 NSMutableString methods

+ (id)string;

- (void)appendString:(NSString *)string;

- (void)appendFormat:(NSString *)format, ...;

* 유용 NSArray methods

+ arrayWithObjects:(id)firstObj, ...;

- (unsigned)count;

- (id)objectAtIndex:(unsigned)index;

- (unsigned)indexOfObject:(id)object;

* 유용 NSMutableArray methods

+ (NSMutableArray *)array;

- (void)addObject:(id)object;

- (void)removeObject:(id)oject;

- (void)removeAllObjects;

- (void)insertObject:(id)object atIndex:(unsigned)index;

* 유용 NSDictionary methods

+ dictionaryWithObjectsAndKeys:(id)firstObject, ...;

- (unsigned)count;

- (id)objectForKey:(id)key;

* 유용 NSMutableDictionary methods

+ (NSMutableDictionary *)dictionary;

- (void)setObject:(id)object forKey:(id)key;

- (void)removeObjectForKey:(id)key;

- (void)removeAllObjects;

[colors setObject:@"Orange" forKey:@"HighlightColor"];

* 유용 NSSet methods : Unordered collection of objects

+ setWithObjects:(id)firstObj, ...;

- (unsigned)count;

- (BOOL)containsObject:(id)object;

* 유용 NSMutableSet methods

+ (NSMutableSet *)set;

- (void)addObject:(id)object;

- (void)removeObject:(id)object;

- (void)removeAllObjects;

- (void)intersectSet:(NSSet *)otherSet;

- (void)minusSet:(NSSet *)otherSet;

* 유용 NSNumber methods

+ (NSNumber *)numberWithInt:(int)value;

+ (NSNumber *)numberWithDouble:(double)value;

- (int)intValue;

- (double)doubleValue;

* Selectors 활용 예

SEL mySelector = @selector(name);

SEL anotherSelector = @selector(setName:);

SEL lastSelector = @selector(doStuff:withThing:andThing:); // 3개의 arguments