In my iPhone app I am getting the device token from Apple which I am assigning a public property inside the Delegate file as shown below:
- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken
{
self.dToken = [[NSString alloc] initWithData:deviceToken encoding:NSUTF8StringEncoding];
}
The dToken property is declared as shown below:
NSString *dToken;
@property (nonatomic,retain) NSString *dToken;
But when I try to retrieve the device token from another file I get the null value.
+(NSString *) getDeviceToken
{
NSString *deviceToken = [(MyAppDelegate *)[[UIApplication sharedApplication] delegate] dToken];
NSLog(@" getDeviceToken = %@",deviceToken); // This prints NULL
return deviceToken;
}
What am I doing wrong?
I suggest you to convert token to string in this way:
self.dToken = [[[deviceToken description]
stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]]
stringByReplacingOccurrencesOfString:@" "
withString:@""];
UPDATED:
As many people mentioned it is better to use next approach to convert NSData *
to NSString *
:
@implementation NSData (Conversion)
- (NSString *)hexadecimalString
{
const unsigned char *dataBuffer = (const unsigned char *)[self bytes];
if (!dataBuffer) {
return [NSString string];
}
NSUInteger dataLength = [self length];
NSMutableString *hexString = [NSMutableString stringWithCapacity:(dataLength * 2)];
for (int i = 0; i < dataLength; ++i) {
[hexString appendFormat:@"%02lx", (unsigned long)dataBuffer[i]];
}
return hexString;
}
@end