Consider this code: NSString *aString = @\"\\tThis is a sample string\"; NSString *trimmed开发者_开发知识库String = [aString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
I studying NSCharacterset class. NSString and NSCharacterset look like similar class. Who can explain difference 开发者_如何转开发between NSString and NSCharacterset?
I got a warning message in NSCharacterSet *myCharSet3 = [NSCharacterSet characterSetWithCharactersInString:query3];
I wonder how I can use the constants NSLineSeparatorCharacter and NSParagraphSeparatorChar开发者_如何学Cacter as a parameter to a function instead of hard coding \\n.
I have an NSCharacterSet which contains all the characters I want 开发者_如何学JAVAto remove from my NSString.
Building an NSCharacter set to restrict a UITextField for entering user names. I want the user to be able to also enter an underscore (so [A-Za-z0-9_]) but alphanumericCharacterSet does not include it
I\'m开发者_开发问答 looking for a quick and easy way to strip non-alphanumeric characters from an NSString. Probably something using an NSCharacterSet, but I\'m tired and nothing seems to return a str
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