Creating a Standard Character Set

+ alphanumericCharacterSet

Returns a character set containing the characters in the categories Letters, Marks, and Numbers.

Example

unichar eezyUnichar1 = [@"a!1" characterAtIndex:0];
unichar eezyUnichar2 = [@"a!1" characterAtIndex:1];
unichar eezyUnichar3 = [@"a!1" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet alphanumericCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 04:33:44.196 iOS-Tutorial[2803:a0b] 1
2014-04-09 04:33:44.197 iOS-Tutorial[2803:a0b] 0
2014-04-09 04:33:44.197 iOS-Tutorial[2803:a0b] 1

+ capitalizedLetterCharacterSet

Returns a character set containing the characters in the category of Titlecase Letters.

Example

    NSCharacterSet *characterSet = [NSCharacterSet capitalizedLetterCharacterSet];

+ controlCharacterSet

Returns a character set containing the characters in the categories of Control or Format Characters.

Example

unichar eezyUnichar1 = [@"\a@1" characterAtIndex:0];
unichar eezyUnichar2 = [@"A@1" characterAtIndex:1];
unichar eezyUnichar3 = [@"A@1" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet controlCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 05:05:37.906 iOS-Tutorial[3009:a0b] 1
2014-04-09 05:05:37.907 iOS-Tutorial[3009:a0b] 0
2014-04-09 05:05:37.907 iOS-Tutorial[3009:a0b] 0

+ decimalDigitCharacterSet

Returns a character set containing the characters in the category of Decimal Numbers.

Example

unichar eezyUnichar1 = [@"\a@1" characterAtIndex:0];
unichar eezyUnichar2 = [@"A@1" characterAtIndex:1];
unichar eezyUnichar3 = [@"A@1" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet decimalDigitCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 05:08:02.528 iOS-Tutorial[3036:a0b] 0
2014-04-09 05:08:02.529 iOS-Tutorial[3036:a0b] 0
2014-04-09 05:08:02.530 iOS-Tutorial[3036:a0b] 1

+ decomposableCharacterSet

Returns a character set containing all individual Unicode characters that can also be represented as composed character sequences.

Example

NSCharacterSet *characterSet = [NSCharacterSet decomposableCharacterSet];

+ illegalCharacterSet

Returns a character set containing values in the category of Non-Characters or that have not yet been defined in version 3.2 of the Unicode standard.

Example

NSCharacterSet *characterSet = [NSCharacterSet illegalCharacterSet];

+ letterCharacterSet

Returns a character set containing the characters in the categories Letters and Marks.

Example

unichar eezyUnichar1 = [@"A@1" characterAtIndex:0];
unichar eezyUnichar2 = [@"A@1" characterAtIndex:1];
unichar eezyUnichar3 = [@"A@1" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet letterCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 05:16:19.933 iOS-Tutorial[3098:a0b] 1
2014-04-09 05:16:19.935 iOS-Tutorial[3098:a0b] 0
2014-04-09 05:16:19.935 iOS-Tutorial[3098:a0b] 0

+ lowercaseLetterCharacterSet

Returns a character set containing the characters in the category of Lowercase Letters.

Example

NSRange lowercaseCharRange = [@"abc" rangeOfCharacterFromSet:[NSCharacterSet lowercaseLetterCharacterSet]];
NSLog(@"%d",lowercaseCharRange.location!=NSNotFound);

Output

2014-04-09 05:21:26.737 iOS-Tutorial[3152:a0b] 1

+ newlineCharacterSet

Returns a character set containing the newline characters.

Example

NSRange newlineRange = [@"Eezy Tutorials\n" rangeOfCharacterFromSet:[NSCharacterSet newlineCharacterSet]];
NSLog(@"%d",newlineRange.location!=NSNotFound);

Output

2014-04-09 05:30:19.539 iOS-Tutorial[3320:a0b] 1

+ nonBaseCharacterSet

Returns a character set containing the characters in the category of Marks.

Example

NSCharacterSet *characterSet = [NSCharacterSet nonBaseCharacterSet];

+ punctuationCharacterSet

Returns a character set containing the characters in the category of Punctuation.

Example

unichar eezyUnichar1 = [@"A,;" characterAtIndex:0];
unichar eezyUnichar2 = [@"A,;" characterAtIndex:1];
unichar eezyUnichar3 = [@"A,;" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet punctuationCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 05:32:38.123 iOS-Tutorial[3340:a0b] 0
2014-04-09 05:32:38.124 iOS-Tutorial[3340:a0b] 1
2014-04-09 05:32:38.124 iOS-Tutorial[3340:a0b] 1

+ symbolCharacterSet

Returns a character set containing the characters in the category of Symbols.

Example

unichar eezyUnichar1 = [@"$,;" characterAtIndex:0];
unichar eezyUnichar2 = [@"$,;" characterAtIndex:1];
unichar eezyUnichar3 = [@"$,;" characterAtIndex:2];
NSCharacterSet *characterSet = [NSCharacterSet symbolCharacterSet];
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar1]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar2]);
NSLog(@"%d",[characterSet characterIsMember:eezyUnichar3]);

Output

2014-04-09 05:33:47.694 iOS-Tutorial[3365:a0b] 1
2014-04-09 05:33:47.694 iOS-Tutorial[3365:a0b] 0
2014-04-09 05:33:47.694 iOS-Tutorial[3365:a0b] 0

+ uppercaseLetterCharacterSet

Returns a character set containing the characters in the categories of Uppercase Letters and Titlecase Letters.

Example

NSCharacterSet *characterSet = [NSCharacterSet capitalizedLetterCharacterSet];
NSRange uppercaseRange = [@"Eezy Tutorials" rangeOfCharacterFromSet:[NSCharacterSet uppercaseLetterCharacterSet]];
NSLog(@"%d",uppercaseRange.location!=NSNotFound);

Output

2014-04-09 05:28:43.767 iOS-Tutorial[3290:a0b] 1

+ whitespaceAndNewlineCharacterSet

Returns a character set containing Unicode General Category Z*, U000A ~ U000D, and U0085.

Example

NSLog(@"%@",[@"\nEezy Tutorials Website \n  " stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]);

Output

2014-04-09 05:45:27.725 iOS-Tutorial[3495:a0b] Eezy Tutorials Website

+ whitespaceCharacterSet

Returns a character set containing only the in-line whitespace characters space (U+0020) and tab (U+0009).

Example

NSLog(@"%@",[@"  Eezy Tutorials Website   " stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]);

Output

2014-04-09 05:46:03.709 iOS-Tutorial[3505:a0b] Eezy Tutorials Website

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