iOS13下获取的deviceToken格式变化的问题

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

在iOS13上，苹果回传的deviceToken格式发生了变化，如下图：

这里需要判断下将token处理成统一格式，代码如下：

- (NSString *)getHexStringForData:(NSData *)data
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 13) {
        
        if (![data isKindOfClass:[NSData class]]) {
            return @"";
        }
        NSUInteger len = [data length];
        char *chars = (char *)[data bytes];
        NSMutableString *hexString = [[NSMutableString alloc]init];
        for (NSUInteger i=0; i<len; i++) {
            [hexString appendString:[NSString stringWithFormat:@"%0.2hhx" , chars[i]]];
        }
        return hexString;
    } else {
         NSString *myToken = [[data description] stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]];
        myToken = [myToken stringByReplacingOccurrencesOfString:@" " withString:@""];
        return myToken;
    }
}

iOS13适配参考链接