I'm new to iPhone development, I want to convert a string to hex format.
For example 00A400024F01 to 0x00,0xA4,0x00,0x02,0x4F,0x01 I guess I should start by dividing the string and then convert the grouped value. I don't know how to do that.
u just found answer from this stackoverflow question:-
How to convert an NSString to hex values
+ (NSString *) stringToHex:(NSString *)str
{
NSUInteger len = [str length];
unichar *chars = malloc(len * sizeof(unichar));
[str getCharacters:chars];
NSMutableString *hexString = [[NSMutableString alloc] init];
for(NSUInteger i = 0; i < len; i++ )
{
// [hexString [NSString stringWithFormat:#"%02x", chars[i]]]; /*previous input*/
[hexString appendFormat:#"%02x", chars[i]]; /*EDITED PER COMMENT BELOW*/
}
free(chars);
return [hexString autorelease];
}
UPDATE
You can divide one sting on to two string using below method:-
NSString * mystring = #"Hello,How are you";// suppos your string like that
NSArray * array = [mystring componentsSeparatedByString:#","];
NSString * str1 = [array objectAtIndex:0]; //Hello
NSString * str2 = [array objectAtIndex:1]; //How are you
and if you want to murge two string in to one string like :-
NSString *str1=#"hi Sweet Lady";
NSString *str2=#"How are you";
NSString *mainstr=[NSString stringWithFormat:#"%# %#",str1,str2];
Output is ==== hi Sweet Lady How are you
Related
I have an one hexa decimal number
535443326663315634524877795678586b536854535530342f44526a795744716133353942704359697a6b736e446953677171555473
I want to convert this number to ASCII format which will look like this
STC2fc1V4RHwyVxXkShTSU04/DRjyWDqa359BpCYizksnDiSgqqUTsYUOcHKHNMJOdqR1/TQywpD9a9xhri
i have seen solutions here but none of them is useful to me
NSString containing hex convert to ascii equivalent
i checked here but they give different result. Any help
This works perfectly
- (NSString *)stringFromHexString:(NSString *)hexString {
// The hex codes should all be two characters.
if (([hexString length] % 2) != 0)
return nil;
NSMutableString *string = [NSMutableString string];
for (NSInteger i = 0; i < [hexString length]; i += 2) {
NSString *hex = [hexString substringWithRange:NSMakeRange(i, 2)];
NSInteger decimalValue = 0;
sscanf([hex UTF8String], "%x", &decimalValue);
[string appendFormat:#"%c", decimalValue];
NSLog(#"string--%#",string);
}
_hexString1=string;
NSLog(#"string ---%#",_hexString1);
return string;
}
If you're starting with NSData * you could get the ASCII string this way:
NSData *someData = [NSData dataWithHexString:#"ABC123"];
NSString *asciiString = [[NSString alloc] initWithData: someData encoding:NSASCIIStringEncoding];
In my application I am converting a NSString to HexString. But I always require a fixed size(16 bytes) hex string e.g. if the length of my hex string is 15 bytes, I want it to be 16 bytes. I know that I can add zeros at the beginning of the hex string, but how to add that because simply adding a "0" is not working while I am converting it back into NSString.
You can try this code....
+ (NSString *) stringToHex:(NSString *)str
{
NSUInteger len = [str length];
unichar *chars = malloc(len * sizeof(unichar));
[str getCharacters:chars];
NSMutableString *hexString = [[NSMutableString alloc] init];
for(NSUInteger i = 0; i < len; i++ )
{
// [hexString [NSString stringWithFormat:#"%02x", chars[i]]]; //previous input
[hexString appendFormat:#"%02x", chars[i]]; //EDITED PER COMMENT BELOW
}
free(chars);
return [hexString autorelease];
}
I hope this will help you.
happy coding.
I have a string like: "mocktail, wine, beer"
How can I convert this into: "mocktail", "wine", "beer"?
the following gives you the desired result:
NSString *_inputString = #"\"mocktail, wine, beer\"";
NSLog(#"input string : %#", _inputString);
NSLog(#"output string : %#", [_inputString stringByReplacingOccurrencesOfString:#", " withString:#"\", \""]);
the result is:
input string : "mocktail, wine, beer"
output string : "mocktail", "wine", "beer"
You need to use:
NSArray * components = [myString componentsSeparatedByString: #", "];
NSString *string = #"mocktail, wine, beer";
//remove whitespaces
NSString *trimmedString = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
//get array of string
NSArray *array = [trimmedString componentsSeparatedByString:#","];
NSMutableArray *newArray = [[NSMutableArray alloc] init];
for (NSString *trimmedString in array) {
NSString *newString = [NSMutableString stringWithFormat:#"'%#'", trimmedString];
[newArray addObject:newString];
}
//merge new strings
NSString *finalString = [NSString stringWithFormat:#"%#", [newArray objectAtIndex:0]];
for (NSInteger i = 1; i < [newArray count]; i++) {
finalString = [NSString stringWithFormat:#"%#, %#", finalString, [newArray objectAtIndex:i]];
}
Without knowing spesifically about iOS or objective-c, I assume you could use a split function.
In almost any higher level programming language there is such a function.
Try:
Objective-C split
This gets you an array of Strings. You can then practically do with those what you want to do, e.g. surrounding them with single quotes and appending them back together. :D
i have for exemple "My String" i want to extract the first character .
String *_initialeStr = self.carte.Titre ;
originalCarte.Init = memmove(_initialeStr , _initialeStr+1,length(_initialeStr));
NSString has characterAtIndex: method where you can pass 0 as index...
Use characterAtIndex: from NSString class.
- (unichar)characterAtIndex:(NSUInteger)index
Use as below .
NSString *temp = #"Hello world";
unichar myCharacter = [temp characterAtIndex:0];
That doesn't even look like Objective-C.
Having a property named Init is quite confusing and what is String?
Perhaps this is what you want:
NSString *initialString = self.carte.titre;
originalCarte.initialLetter = [initialString characterAtIndex:0];
This outputs the first character of myString:
NSString *myString = #"The text I want to access.";
NSMutableArray *myArray = [[NSMutableArray alloc] initWithCapacity:[myString length]];
for ( i = 0; i < [myString length]; i++ )
[myArray addObject:[NSNumber numberWithChar:[myString characterAtIndex:i]]];
NSLog( #"First character: %c", [[myArray objectAtIndex:0] charValue] );
my code works great until know and, if I put a double digit number into the text field (like 12) nslog returns 2 single digit numbers (like 1 and 2). Now I need to put these 2 single digit numbers into 2 strings. can somebody help me. thanks in advance.
NSString *depositOverTotalRwy = [NSString stringWithFormat:#"%#", [deposit text]];
NSArray *components = [depositOverTotalRwy
componentsSeparatedByString:#"/"];
NSString *firstThird = [components objectAtIndex:0];
for(int i = 0; i < [firstThird length]; i++)
{
char extractedChar = [firstThird characterAtIndex:i];
NSLog(#"%c", extractedChar);
}
You should be able to use -stringWithFormat:.
NSString *s = [NSString stringWithFormat:#"%c", extractedChar];
EDIT:
You can store them in an array.
NSMutableArray *digits = [NSMutableArray array];
for ( int i = 0; i < [s length]; i++ ) {
char extractedChar = [s characterAtIndex:i];
[digits addObject:[NSString stringWithFormat:#"%c", extractedChar]];
}
Try to print the value of firstThird using NSLog(), see what it exactly hold, you code seem correct,
Use characterAtIndex function for NSString to extract a character at known location
- (unichar)characterAtIndex:(NSUInteger)index
Use as below
NSString *FirstDigit = [NSString stringWithFormat:#"%c", [myString characterAtIndex:0]];
NSString *SecondDigit = [NSString stringWithFormat:#"%c", [myString characterAtIndex:1]];