如何将字符串转换为utf8编码？

Question

I am reading my app directory like this

NSArray *pathss = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectorys = [pathss objectAtIndex:0];
NSError * error;
NSMutableArray * directoryContents =  [[NSFileManager defaultManager]
                            contentsOfDirectoryAtPath:documentsDirectorys error:&error];

the output i get:

"Forms_formatted.pdf",
"fund con u\U0308u\U0308.pdf",
"hackermonthly-issue.pdf",

these are the files name. my question, how come i able to convert this name "fund con u\\U0308u\\U0308.pdf" to correct format. thanks in advance

Answer 1

Convert the NSString to NSData with UTF-16 encoding, convert back to a NSString with UTF-8 encoding. It is probably UTF-16 big endian with no BOM. The character is not ASCII.

The character u\\U0308 is not ASCII, it is a Combining Diacritical Mark ̈ü, the character is also known as double dot above, umlaut, Greek dialytika and double derivative. The \\U0308 puts the umlaut above the u character.

Answer 2

Maybe this will help:

NSString *documentsDirectorys = [pathss objectAtIndex:0];
const char *documentsDirectoryCstring = [documentsDirectorys cStringUsingEncoding:NSASCIIStringEncoding];

EDIT:

const char *documentsDirectoryCstring = [documentsDirectorys cStringUsingEncoding:NSUTF8StringEncoding];

Answer 3

You can try this. NSLog use description method of NSArray to print NSArray object, which deals with unicode characters differently than the description on objects its contains such as NSString objects. Or you can loop through the array and NSLog each item.

NSLog(@"%@", [NSString stringWithCString:[[array description] cStringUsingEncoding:NSASCIIStringEncoding] encoding:NSNonLossyASCIIStringEncoding]);