我可以使用identifierForVendor，但每次安装应用程序时它也会更改。
第三个选项是使用DeviceCheck API来识别设备，但它仅适用于iOS 11。
请告诉我如何识别用户设备并在Sim Swap的情况下临时禁用用户帐户。
由于Keychain数据在应用卸载后仍然存在，因此您需要将UUID保存在Keychain中。
iOS 将Keychain信息视为敏感信息。 您可以使用SwiftKeychainWrapper库轻松访问Keychain。
苹果文档关于SIM更改的说明：https://developer.apple.com/documentation/coretelephony/cttelephonynetworkinfo
CodingExample:
let uuid = UIDevice.current.identifierForVendor?.uuidString
KeychainWrapper.standard.set(uuid, forKey: "appUUID")
每当您想获取appUUID时，只需从钥匙串中获取：
let uuid = KeychainWrapper.standard.string(forKey: "appUUID")
/* DeviceUID.h
#import <Foundation/Foundation.h>
@interface DeviceUID : NSObject
+ (NSString *)uid;
@end
*/
// Device.m
#import "DeviceUID.h"
@import UIKit;
@interface DeviceUID ()
@property(nonatomic, strong, readonly) NSString *uidKey;
@property(nonatomic, strong, readonly) NSString *uid;
@end
@implementation DeviceUID
@synthesize uid = _uid;
#pragma mark - Public methods
+ (NSString *)uid {
return [[[DeviceUID alloc] initWithKey:@"deviceUID"] uid];
}
#pragma mark - Instance methods
- (id)initWithKey:(NSString *)key {
self = [super init];
if (self) {
_uidKey = key;
_uid = nil;
}
return self;
}
/*! Returns the Device UID.
The UID is obtained in a chain of fallbacks:
- Keychain
- NSUserDefaults
- Apple IFV (Identifier for Vendor)
- Generate a random UUID if everything else is unavailable
At last, the UID is persisted if needed to.
*/
- (NSString *)uid {
if (!_uid) _uid = [[self class] valueForKeychainKey:_uidKey service:_uidKey];
if (!_uid) _uid = [[self class] valueForUserDefaultsKey:_uidKey];
if (!_uid) _uid = [[self class] appleIFV];
if (!_uid) _uid = [[self class] randomUUID];
[self save];
return _uid;
}
/*! Persist UID to NSUserDefaults and Keychain, if not yet saved
*/
- (void)save {
if (![DeviceUID valueForUserDefaultsKey:_uidKey]) {
[DeviceUID setValue:self.uid forUserDefaultsKey:_uidKey];
}
if (![DeviceUID valueForKeychainKey:_uidKey service:_uidKey]) {
[DeviceUID setValue:self.uid forKeychainKey:_uidKey inService:_uidKey];
}
}
#pragma mark - Keychain methods
/*! Create as generic NSDictionary to be used to query and update Keychain items.
* param1
* param2
*/
+ (NSMutableDictionary *)keychainItemForKey:(NSString *)key service:(NSString *)service {
NSMutableDictionary *keychainItem = [[NSMutableDictionary alloc] init];
keychainItem[(__bridge id)kSecClass] = (__bridge id)kSecClassGenericPassword;
keychainItem[(__bridge id)kSecAttrAccessible] = (__bridge id)kSecAttrAccessibleAlways;
keychainItem[(__bridge id)kSecAttrAccount] = key;
keychainItem[(__bridge id)kSecAttrService] = service;
return keychainItem;
}
/*! Sets
* param1
* param2
*/
+ (OSStatus)setValue:(NSString *)value forKeychainKey:(NSString *)key inService:(NSString *)service {
NSMutableDictionary *keychainItem = [[self class] keychainItemForKey:key service:service];
keychainItem[(__bridge id)kSecValueData] = [value dataUsingEncoding:NSUTF8StringEncoding];
return SecItemAdd((__bridge CFDictionaryRef)keychainItem, NULL);
}
+ (NSString *)valueForKeychainKey:(NSString *)key service:(NSString *)service {
OSStatus status;
NSMutableDictionary *keychainItem = [[self class] keychainItemForKey:key service:service];
keychainItem[(__bridge id)kSecReturnData] = (__bridge id)kCFBooleanTrue;
keychainItem[(__bridge id)kSecReturnAttributes] = (__bridge id)kCFBooleanTrue;
CFDictionaryRef result = nil;
status = SecItemCopyMatching((__bridge CFDictionaryRef)keychainItem, (CFTypeRef *)&result);
if (status != noErr) {
return nil;
}
NSDictionary *resultDict = (__bridge_transfer NSDictionary *)result;
NSData *data = resultDict[(__bridge id)kSecValueData];
if (!data) {
return nil;
}
return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
#pragma mark - NSUserDefaults methods
+ (BOOL)setValue:(NSString *)value forUserDefaultsKey:(NSString *)key {
[[NSUserDefaults standardUserDefaults] setObject:value forKey:key];
return [[NSUserDefaults standardUserDefaults] synchronize];
}
+ (NSString *)valueForUserDefaultsKey:(NSString *)key {
return [[NSUserDefaults standardUserDefaults] objectForKey:key];
}
#pragma mark - UID Generation methods
+ (NSString *)appleIFA {
NSString *ifa = nil;
Class ASIdentifierManagerClass = NSClassFromString(@"ASIdentifierManager");
if (ASIdentifierManagerClass) { // a dynamic way of checking if AdSupport.framework is available
SEL sharedManagerSelector = NSSelectorFromString(@"sharedManager");
id sharedManager = ((id (*)(id, SEL))[ASIdentifierManagerClass methodForSelector:sharedManagerSelector])(ASIdentifierManagerClass, sharedManagerSelector);
SEL advertisingIdentifierSelector = NSSelectorFromString(@"advertisingIdentifier");
NSUUID *advertisingIdentifier = ((NSUUID* (*)(id, SEL))[sharedManager methodForSelector:advertisingIdentifierSelector])(sharedManager, advertisingIdentifierSelector);
ifa = [advertisingIdentifier UUIDString];
}
return ifa;
}
+ (NSString *)appleIFV {
if(NSClassFromString(@"UIDevice") && [UIDevice instancesRespondToSelector:@selector(identifierForVendor)]) {
// only available in iOS >= 6.0
return [[UIDevice currentDevice].identifierForVendor UUIDString];
}
return nil;
}
+ (NSString *)randomUUID {
if(NSClassFromString(@"NSUUID")) {
return [[NSUUID UUID] UUIDString];
}
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
CFStringRef cfuuid = CFUUIDCreateString(kCFAllocatorDefault, uuidRef);
CFRelease(uuidRef);
NSString *uuid = [((__bridge NSString *) cfuuid) copy];
CFRelease(cfuuid);
return uuid;
}
@end