//
//  JXUUID.m
//  设备标识符
//
//  Created by 曾觉新 on 2017/8/24.
//  Copyright © 2017年 曾觉新. All rights reserved.
//

#import "JXUUID.h"
#import <UIKit/UIKit.h>
#import "PDKeyChain.h"
#import <AdSupport/AdSupport.h>

static NSString *const uuidKey = @"com.JXUUID";

@implementation JXUUID

+ (nonnull NSString *)uuid
{
    static NSString *uuid;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        uuid = [PDKeyChain objectForKey:uuidKey];
        if (uuid && uuid.length > 0) {
        } else {
            uuid = [[NSUUID UUID] UUIDString];
            [PDKeyChain setObject:uuid forKey:uuidKey];
        }
    });
    return uuid;
}
+ (nonnull NSString *)idfa
{
    static NSString *idfa;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        idfa = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
    });
    return idfa;
}

+ (nonnull NSString *)systemUUID
{
    return [UIDevice currentDevice].identifierForVendor.UUIDString;
}

@end