删除 NSMutableAttributedString 中的特殊字符

Question

In my app to show text in CATextLayer (change colors for characters),using NSMutableAttributedString to change colors,i want remove special characters in NSMutableAttributedString to show PopUp view, but didn't know how to remove special characters, to help to solve problem

i want like this type of o/p

"code" to code  //in NSMutableAttributedString, not in NSString

Answer 1

to remove such characters you simply write something like this:

NSMutableString* mutableString = ...;
[mutableString replaceOccurrencesOfString:@"\"" withString:@"" options:0 range:NSMakeRange(0, mutableString.length)];

Note that symbol " is written as \\" - this one is called an escape sequence. Here is a list of such special characters in C - http://msdn.microsoft.com/en-us/library/h21280bw(v=vs.80).aspx

Answer 2

Try this...This may help you.

NSMutableString *unfilteredString = @"!@#$%^&*()_+|abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
NSCharacterSet *notAllowedChars = [[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"] invertedSet];
NSMutableString *resultString = [[unfilteredString componentsSeparatedByCharactersInSet:notAllowedChars] componentsJoinedByString:@""];
NSLog (@"Result: %@", resultString);

Answer 3

You can give try to this may it fits in your code:

 NSMutableString *mutableStrng = [NSMutableString stringWithCapacity:1000];
[mutableStrng setString:@"my name is i#pho#ne"];

[mutableStrng replaceOccurrencesOfString:@"#" withString:@"" options:0 range:NSMakeRange(0,
 mutableStrng.length)];
NSMutableAttributedString *mutableAtrString = [[NSMutableAttributedString
 alloc]initWithString:mutableStrng];