Re: Push Notification device token from APNS auth response.


Alex Zavatone
 

And from the WWDC 2020 10095 Notification video.

class APNSHelperSwiftNSObject
{
    @objc(stringFromDeviceToken:) public class func stringFromDeviceToken2(deviceToken: Data) -> String
    {
        let tokenComponents = deviceToken.map { data in String(format: "%02.2hhx", data) }
        let deviceTokenString = tokenComponents.joined()

        

        return deviceTokenString
    }
}


Cheers,
Alex Zavatone


On Mar 12, 2021, at 10:55 AM, Alex Zavatone via groups.io <zav@...> wrote:

Sometimes we want to get the string value of the device token after requesting push auth from APNS in didRegisterForRemoteNotificationWithDeviceToken.

Here’s how you can get that string value in Objective-C and Swift.

Cheers,
Alex Zavatone


//
//  APNSHelper.h
//  pushy
//
//  Created by Alex Zavatone on 3/10/21.
//  Copyright © 2021. All rights reserved.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface APNSHelper : NSObject

+ (NSString *)stringFromDeviceToken:(NSData *)deviceToken;

@end

NS_ASSUME_NONNULL_END


//
//  APNSHelper.m
//  pushy
//
//  Created by Alex Zavatone on 3/10/21.
//  Copyright © 2021. All rights reserved.
//

#import "APNSHelper.h"

@implementation APNSHelper

+ (NSString *)stringFromDeviceToken:(NSData *)deviceToken
{
    NSUInteger length = deviceToken.length;
    if (length == 0) {
        return nil;
    }
    const unsigned char *buffer = deviceToken.bytes;
    NSMutableString *hexString  = [NSMutableString stringWithCapacity:(length * 2)];
    for (int charIndex = 0; charIndex < length; charIndex++) {
        [hexString appendFormat:@"%02x", buffer[charIndex]];
    }
    return [hexString copy];
}

@end




//
//  APNSHelperSwift.swift
//  pushy
//
//  Created by Alex Zavatone on 3/11/21.
//

import Foundation

@objc(APNSHelperSwift)
class APNSHelperSwift: NSObject
{
    
    @objc(stringFromDeviceToken:) public class func stringFromDeviceToken(deviceToken: Data?) -> String?
    {
        if (deviceToken == nil) {
            return nil;
        }
        
        let length = deviceToken!.count * MemoryLayout<Int16>.stride
        if length == 0 {
            return nil
        }
    
        var hexString = ""
        
        var iter = deviceToken!.makeIterator()
        
        while true {
                   guard
                       let char = iter.next()
                      
                       else {
                           break
                       }
            hexString += String(format: "%02x", char)
        }
        
        return hexString
    }
}




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