- (void)myStringExample
{
// 파일명에서 확장자 얻기
NSString *fileName = @"somefile.txt";
NSString *fileExtension = [fileName pathExtension];
// 공백문자 없애기
NSString *myString = @" one two three ";
NSString *trimed = [myString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSString *string1 = @"some string";
NSString *string2 = @"some other string";
NSString *string3 = @"Some StRiNg";
NSString *string4 = @"some other string";
// 문자열 비교
NSLog(@"%i",[string2 isEqualToString:string4]);
NSLog(@"%i",[string1 isEqualToString:string3]);
NSLog(@"%i",([string1 caseInsensitiveCompare:string3] == NSOrderedSame));
// 스트링을 double, int값으로 변경하기
NSString *n = @"12345";
double d = [n doubleValue];
int i = [n intValue];
NSLog(@"%f, %d",d,i);
// URL에서 HTML얻기
NSURL *url = [NSURL URLWithString:@"http://google.com"];
NSString *pageContents = [NSString stringWithContentsOfURL:url];
NSLog(@"%@", pageContents);
// 숫자 변경
NSString *numberString = @"one two three";
NSRange foundRange = [numberString rangeOfString:@"two"];
NSString *oneString = [numberString substringToIndex:3];
NSString *twoString = [numberString substringWithRange:NSMakeRange(4, 3)];
NSString *threeString = [numberString substringFromIndex:8];
NSString *repeatString = [numberString
stringByReplacingOccurrencesOfString:@"three" withString:@"four"];
BOOL found = ([numberString rangeOfString:@"two1"].location != NSNotFound);
NSString *stringa = @"one";
NSString *stringb = [stringa stringByAppendingString:@" two"];
NSLog(@"%i - %i",foundRange.location, foundRange.length);
NSLog(@"%@",repeatString);
NSLog(@"[%@] [%@] [%@]",oneString,twoString,threeString);
NSLog(@"%@",[numberString componentsSeparatedByString:@" "]);
}
- (void)myDateExample
{
// 현재 날짜, 시간 얻기
NSDate *myDate = [NSDate date];
NSLog(@"%@", myDate);
// 다음 날짜 얻기(초를 기반한 interval로 계산)
NSTimeInterval secondsPerDay = 24*60*60;
NSDate *tomorrow = [NSDate dateWithTimeIntervalSinceNow:secondsPerDay];
NSLog(@"%@", tomorrow);
// 이전 날짜 얻기
NSDate *now = [NSDate date];
NSDate *yesterday = [now addTimeInterval:-secondsPerDay];
NSLog(@"%@", yesterday);
// 날짜 차이 얻기
NSTimeInterval secondsBetweenDates = [yesterday timeIntervalSinceDate:now];
NSLog(@"%@", secondsBetweenDates);
NSDateComponents *comp = [[NSDateComponents alloc] init];
[comp setMonth:06];
[comp setDay:01];
[comp setYear:2010];
NSCalendar *myCal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *myDate2 = [myCal dateFromComponents:comp];
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
NSString *friendlyDate = [formatter stringFromDate:now];
NSLog(@"%@", friendlyDate);
[formatter setDateFormat:@"yyyy-mm-dd"];
NSString *friendlyDate2 = [formatter stringFromDate:now];
NSLog(@"%@", friendlyDate2);
}
- (void)myArrayExample
{
NSString *string1 = @"one";
NSString *string2 = @"two";
NSString *string3 = @"three";
NSArray *myArray = [NSArray arrayWithObjects:string1, string2, string3, nil];
// Array 복사
NSArray *myArray2 = [NSArray arrayWithArray:myArray];
// 범위를 지정해서 Array를 복사
NSRange range = NSMakeRange(0, 2);
NSArray *subArray = [myArray subarrayWithRange:range];
int arrayLength = [myArray count];
NSLog(@"%d", arrayLength);
int arrayLength2 = [subArray count];
NSLog(@"%d", arrayLength2);
// 루프를 출력
for (NSString *obj in myArray) {
NSLog(@"%@", obj);
}
// 루프를 거꾸로 출력
for (NSString *obj2 in [myArray reverseObjectEnumerator]) {
NSLog(@"%@", obj2);
}
// 정렬
[myArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
}
- (void)myDictionaryExample
{
NSArray *arr1 = [NSArray arrayWithObjects:@"iPhone", @"iPod", nil];
NSArray *arr2 = [NSArray arrayWithObjects:@"iMac", @"Mac Pro", @"Macbook", @"Macbook Pro", nil];
// 이 부분에서 오류가 남
NSDictionary *myDict = [[NSDictionary alloc] dictionaryWithObjectsAndKeys:arr1, @"mobile", arr2, @"computers", nil];
int dictSize = [myDict count];
NSLog(@"%d", dictSize);
}
- (void)myNotificationExample
{
// Notification 등록
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doSomething:) name:MY_NOTIFICATION object:nil];
// Notification 호출
[[NSNotificationCenter defaultCenter] postNotificationName:MY_NOTIFICATION object:nil];
}
- (void)doSomething:(NSNotification *) aNote
{
NSLog(@"doSomething called...");
// 만약 aNote를 통해서 뭔가 전달되었다면
// [aNote object]로 받아서 처리함
}
- (void)myTimerExample
{
// 타이머 생성
//NSTimer *myTimer = [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(myTimerAction:) userInfo:nil repeats:NO];
//[myTimer invalidate];
// 하루의 총 초
NSTimeInterval secondsPerDay = 24*60*60;
NSDate *tomorrow = [NSDate dateWithTimeIntervalSinceNow:secondsPerDay];
NSTimer *myTimer = [[NSTimer alloc] initWithFireDate:tomorrow interval:10.0 target:self selector:@selector(myTimerAction) userInfo:nil repeats:NO];
[[NSRunLoop mainRunLoop] addTimer:myTimer forMode:NSDefaultRunLoopMode];
}
