NSString processing tips: Splitting strings

abstract The string type is one of the most used types in objective-c, and sometimes there are characters in the string that we do not want. such as "Hello World" in the space, or "Hello/world" in the "/", or "Hello a hello" in the ' a '. These can all be solved by means of nsstring.  

A string with a node, such as @ "<p> annoying nodes <br/></p>" We just want the Middle Chinese

Treatment Method One:

NSString *string1 =@ "<p> annoying nodes <br/></p>";/* Place the unwanted characters all in characterSet1, no additional commas or spaces, unless there is a space in the string you want to remove, here < P/etc are all alone, not as the entire character */Nscharacterset *characterset1 = [Nscharacterset charactersetwithcharactersinstring:@ "<p/brh>"]; //string1 by CHARACTERSET1 elements in the array nsarray *array1 = [string1 componentsseparatedbycharactersinset: CHARACTERSET1]; NSLog (@ "array =%@", array1); for (nsstring *string1 in array1) { if ([string1 length]>0) { //Here string is the Chinese string NSLog ( c13>@ "string =%@", string1); } }

Print Result: 2013-05-31 10:55:34.017 string[17634:303]

array = (
    "",
    "",
    "",
"\u8ba8\u538c\u7684\u8282\u70b9",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    ""
)
2013-05-31 10:55:34.049 string[17634:303]
string = Nasty node

Two, a string with spaces, such as

@ "Hello World" remove space

NSString *string2 =@ "Hello World";                / * Handling spaces */nscharacterset *characterset2 = [Nscharacterset whitespacecharacterset]; //string1 by CHARACTERSET1 elements in the array nsarray *array2 = [string2 componentsseparatedbycharactersinset: CharacterSet2]; NSLog (@ "\narray =%@", array2); //used to store the processed string nsmutablestring *newstring1 = [nsmutablestring string]; For (nsstring *string in array1) {[NewString1 appendstring:string];} NSLog (@ "newstring =%@", newString1);             

Printing results:

2013-05-31 11:02:49.656 string[17889:303]
Array = (
Hello
World
)
2013-05-31 11:02:49.657 string[17889:303] newstring = HelloWorld

PS: Handling other elements such as letters simply changes the value of the Nscharacterset.

+ (ID) controlcharacterset;+ (ID) whitespacecharacterset;+ (ID) whitespaceandnewlinecharacterset;+ (ID) decimaldigitcharacterset;+ (ID) lettercharacterset;+ (ID) lowercaselettercharacterset;+ (ID) uppercaselettercharacterset;+ (ID) nonbasecharacterset;+ (ID) alphanumericcharacterset;+ (ID) decomposablecharacterset;+ (ID) illegalcharacterset;+ (ID)punctuationcharacterset;+ (ID) capitalizedlettercharacterset;+ (ID) symbolcharacterset;+ (ID) newlinecharacterset ns_available (10_5, 2_0); + (ID) Charactersetwithrange: (nsrange) arange;+ (ID) charactersetwithcharactersinstring: ( NSString *) astring;+ (ID) charactersetwithbitmaprepresentation: (NSData *) data;+ (ID) Charactersetwithcontentsoffile: (nsstring *) fName;            

NSString processing tips: Splitting strings