NSString replace unicode characters - ios

Question

I'w working with a server and I have to download text to my iOS application. Only problem : all characters like "é à ç" are replaced by "\U008" for example. Is there a way to fix this problem, to replace this code by the right character ?

Answer 1

Try to parse the received text (textToParse variable) with this one:
NSString *encodedString = textToParse;
NSString *decodedString = [NSString stringWithUTF8String:[encodedString cStringUsingEncoding:[NSString defaultCStringEncoding]]];

Answer 2

I tested some encodings and NSMacOSRomanStringEncoding fit well.
My test was:
NSString *encodedString = [NSString stringWithCString:"Você realmente deseja sair da área restrita" encoding:NSMacOSRomanStringEncoding];
Remember that the message has to be a C-string ("string") and not an NSString(#"string")

Answer 3

You can get character buffer and validate each character like so:
- (NSString *) removeUnicode:(NSString *) unicodeString {
NSUInteger len = [unicodeString length];
unichar buffer[len+1];
[unicodeString getCharacters:buffer range:NSMakeRange(0, len)];
unichar okBuffer[len+1];
int index = 0;
for(int i = 0; i < len; i++) {
if(buffer[i] < 128) {
okBuffer[index] = buffer[i];
index = index + 1;
}
}
NSString *removedUnicode = [[NSString alloc] initWithCharacters:okBuffer length:index];
return removedUnicode;
}
or you can use this sample:
NSCharacterSet *notAllowedChars = [[NSCharacterSet characterSetWithCharactersInString:[NSCharacterSet alphanumericCharacterSet]] invertedSet];
stringWithOutUnicode = [[stringWithUnicode componentsSeparatedByCharactersInSet:notAllowedChars] componentsJoinedByString:#""];
and you can create your own valid character set and get not allowed characters
NSString *allowedCharacters = #"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
NSCharacterSet *notAllowedChars = [[NSCharacterSet characterSetWithCharactersInString: allowedCharacters] invertedSet];