nscharacterset

问题 I wonder how I can use the constants NSLineSeparatorCharacter and NSParagraphSeparatorCharacter as a parameter to a function instead of hard coding \n . - (id)initWithSeparator:(id)separator { m_separator = separator; } What would be the correct parameter type and what conversion needs to be done? Depending on the file contents I wish to call the function like ... Object* obj = [[Object alloc] initWithSeparator:NSLineSeparatorCharacter]; ... or ... Object* obj = [[Object alloc]

问题 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. Is there a way to specify a range like that in short form? I see + (id)characterSetWithRange:(NSRange)aRange , but I'm not really understanding how that would work. I've got a simple UITextField sub-class that I pass the character set to. The restriction works fine and doesn't allow the user to

问题 Currently I am able to make array of Alphabets like below [[NSArray alloc]initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K",@"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z",nil]; Knowing that is available over [NSCharacterSet uppercaseLetterCharacterSet] How to make an array out of it? 回答1: The following code creates an array containing all characters of a given character set. It works also for characters outside of the "basic multilingual plane"

问题 It seems that NSCaseInsensitiveSearch not works in NSString:rangeOfCharacterFromSet . Can someone explain why? is it correct behaviour? NSString *string = @"James Bond Always Rocks"; NSRange range = [string rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"J"] options:NSCaseInsensitiveSearch]; NSLog(@"range->%@",NSStringFromRange(range)); //This prints range->{0, 1} NSString *string = @"James Bond Always Rocks"; NSRange range = [string rangeOfCharacterFromSet:

问题 I have a string with value "€100,000,000". I want to remove the '€' and ',' at the same time. I am try to use [NSCharacterSet symbolSet] but this method only removes the '€' without removing the ','. 回答1: You can try: -(NSString*)cleanString:(NSString*)str NSString *string = [NSString stringWithString:str]; NSCharacterSet *charSet = [NSCharacterSet characterSetWithCharactersInString:@"€,"]; string = [string stringByTrimmingCharactersInSet:charSet]; return string; } 回答2: Use this: string =

问题 I'm trying to write a slugging function which involves stripping out any punctuation characters except for hyphens. I thought the best way to do this would be to create a new CharacterSet as follows: import Foundation extension CharacterSet { func subtracting(charactersIn string: String) -> CharacterSet { let unwantedCharacters = CharacterSet(charactersIn: string) return self.subtracting(unwantedCharacters) } } let punctuationCharactersExcludingHyphen = CharacterSet.punctuationCharacters

问题 I studying NSCharacterset class. NSString and NSCharacterset look like similar class. Who can explain difference between NSString and NSCharacterset? When use NSCharacterset? Thanks your help.. 回答1: An NSString object represents a string of ordered characters (text). An NSCharacterSet object represents a set of characters in no particular order. It is often much quicker to determine whether a character is a member of an NSCharacterSet than an NSString. You can't use an NSCharacterSet object

问题 many examples in SO are fixing both sides, the leading and trailing. My request is only about the trailing. My input text is: " keep my left side " Desired output: " keep my left side" Of course this command will remove both ends: let cleansed = messageText.trimmingCharacters(in: .whitespacesAndNewlines) Which won't work for me. How can I do it? 回答1: A quite simple solution is regular expression, the pattern is one or more( + ) whitespace characters( \s ) at the end of the string( $ ) let

问题 I have downloaded a font from the internet. Now I want to Print the Characterset of that font. I got the CFCharacterSetRef of that font. But I don't know how to print that CFCharacterSetRef. This is my coding. NSString *fontFilePath=@"/Volumes/Work/Mac/Fonts/FONT FOLDER/AngelicWar"; CFStringRef aCFString = (CFStringRef)fontFilePath; CTFontRef fontRef = CTFontCreateWithName(aCFString, 0.0,NULL); CFCharacterSetRef charRef=CTFontCopyCharacterSet (fontRef); For Printing the

问题 I am using MWFeedParser to add a feed into my app. Now the framework passes date's and I it has a few warnings mainly due to older type of code. Now there are 4 warnings left which are all the same and technically I can fix them and remove them so that the warnings are gone, but then I get left with the app not working properly. The code concerning is: // Character sets NSCharacterSet *stopCharacters = [NSCharacterSet characterSetWithCharactersInString:[NSString stringWithFormat:@"< \t\n\r%C