How to convert __NSCFString to NSData in Objective-C - ios

Question

Convert __NSCFString to NSData
App crash when I try to get data from my NSDictionary
NSData *routeData = [dictSelectedScheduleTrip valueForKey:#"routeSerialize"];
Crash Log
[__NSCFString bytes]: unrecognized selector sent to instance 0x107310000
Console Code
po [[dictSelectedScheduleTrip valueForKey:#"routeSerialize"] class]
__NSCFString
Below is my NSData (Not added whole data because data is too long if you want to check all data please open below link)
NSData
routeSerialize = "<d5112fa3 0c000000 382e3330 2e313031 2e313536 02000000 30000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00030200 00000710 008e015d 474cc1fe 5e7fa094 477dd52f 5f0b0400 9f000000 0c240003 01000402 04000200 00000104 00000000 00030100 04020400 02000000 01040000 0000000e 00000600 00000000>";

Answer 1

I found a solution.
Original Answer #zaph
+ (NSData *)dataFromHexString:(NSString *)string
{
string = [string lowercaseString];
NSMutableData *data= [NSMutableData new];
unsigned char whole_byte;
char byte_chars[3] = {'\0','\0','\0'};
int i = 0;
int length = string.length;
while (i < length-1) {
char c = [string characterAtIndex:i++];
if (c < '0' || (c > '9' && c < 'a') || c > 'f')
continue;
byte_chars[0] = c;
byte_chars[1] = [string characterAtIndex:i++];
whole_byte = strtol(byte_chars, NULL, 16);
[data appendBytes:&whole_byte length:1];
}
return data;
}

Answer 2

__NSCFString is a class cluster of NSString, you could convert it as is NSString *, no print (call - (NSString *)description) to get hex string needed.
NSData *routeData = [dictSelectedScheduleTrip valueForKey:#"routeSerialize"];
if ([routeData isKindOfClass:NSString.class]) {
routeData = [(NSString *)routeData dataUsingEncoding:NSUTF8StringEncoding]; // or your other prefer data encoding.
}