刚刚发现，UIDevice uniqueIdentifier属性在iOS 5中已弃用，在iOS 7及以上版本中不可用。似乎没有可供选择的方法或属性。
我们现有的许多应用程序都紧密依赖于这个属性来唯一地识别特定的设备。今后我们该如何处理这个问题?
2011-2012年的文件建议:
特殊注意事项 不要使用uniqueIdentifier属性。创建特定的唯一标识符 你可以调用CFUUIDCreate函数来创建一个UUID，然后写入 使用NSUserDefaults类将它转换到默认数据库。
但是，如果用户卸载和重新安装应用程序，这个值就不一样了。
当前回答
你可以通过以下代码实现:uidevice -with- uniqueidentifier -for ios -5
其他回答
根据@moonlight提出的链接，我做了几次测试，这似乎是最好的解决方案。正如@DarkDust所说，该方法将检查始终可用的en0。 有两种选择: uniqueDeviceIdentifier (MAC+CFBundleIdentifier的MD5) 和uniqueGlobalDeviceIdentifier(MAC的MD5)，这些总是返回相同的值。 下面是我所做的测试(用真正的设备):
#import "UIDevice+IdentifierAddition.h"
NSLog(@"%@",[[UIDevice currentDevice] uniqueDeviceIdentifier]);
NSLog(@"%@",[[UIDevice currentDevice] uniqueGlobalDeviceIdentifier]);
XXXX21f1f19edff198e2a2356bf4XXXX - (WIFI)UDID XXXX7dc3c577446a2bcbd77935bdXXXX - (WIFI)GlobalAppUDID XXXX21f1f19edff198e2a2356bf4XXXX - (3G)UDID XXXX7dc3c577446a2bcbd77935bdXXXX - (3G)GlobalAppUDID XXXX21f1f19edff198e2a2356bf4XXXX - (GPRS)UDID XXXX7dc3c577446a2bcbd77935bdXXXX - (GPRS)GlobalAppUDID XXXX21f1f19edff198e2a2356bf4XXXX - (AirPlane mode)UDID XXXX7dc3c577446a2bcbd77935bdXXXX - (AirPlane mode)GlobalAppUDID XXXX21f1f19edff198e2a2356bf4XXXX - (Wi-Fi)after removing and reinstalling the app XXXX7dc3c577446a2bcbd77935bdXXXX (Wi-Fi) after removing and installing the app
希望对大家有用。
编辑: 正如其他人指出的那样，这个解决方案在iOS 7中不再有用，因为uniqueIdentifier不再可用，查询MAC地址现在总是返回02:00:00:00:00:00
MAC地址可以被欺骗，这使得这种方法对于将内容绑定到特定用户或实现黑名单等安全功能毫无用处。
经过一些进一步的研究，在我看来，我们现在没有一个合适的替代方案。我真心希望苹果能重新考虑他们的决定。
也许给苹果发邮件讨论这个话题是个好主意，或者提交一个关于这个问题的bug /功能请求，因为他们可能还没有意识到这对开发者的全部后果。
我还建议从uniqueIdentifier转换到这个开源库(2个简单的类别)，它利用设备的MAC地址和应用程序捆绑标识符在应用程序中生成一个唯一的ID，可以用作UDID的替代品。
请记住，与UDID不同，这个数字对每个应用程序都是不同的。
你只需要导入包含的NSString和UIDevice类别，并调用[[UIDevice currentDevice] uniqueDeviceIdentifier]，就像这样:
#import "UIDevice+IdentifierAddition.h"
#import "NSString+MD5Addition.h"
NSString *iosFiveUDID = [[UIDevice currentDevice] uniqueDeviceIdentifier]
你可以在Github上找到它:
带有UniqueIdentifier的UIDevice
下面是分类(只有。m文件-检查github项目的头文件):
UIDevice + IdentifierAddition.m
#import "UIDevice+IdentifierAddition.h"
#import "NSString+MD5Addition.h"
#include <sys/socket.h> // Per msqr
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
@interface UIDevice(Private)
- (NSString *) macaddress;
@end
@implementation UIDevice (IdentifierAddition)
////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark Private Methods
// Return the local MAC addy
// Courtesy of FreeBSD hackers email list
// Accidentally munged during previous update. Fixed thanks to erica sadun & mlamb.
- (NSString *) macaddress{
int mib[6];
size_t len;
char *buf;
unsigned char *ptr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_LINK;
mib[4] = NET_RT_IFLIST;
if ((mib[5] = if_nametoindex("en0")) == 0) {
printf("Error: if_nametoindex error\n");
return NULL;
}
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
printf("Error: sysctl, take 1\n");
return NULL;
}
if ((buf = malloc(len)) == NULL) {
printf("Could not allocate memory. error!\n");
return NULL;
}
if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
printf("Error: sysctl, take 2");
return NULL;
}
ifm = (struct if_msghdr *)buf;
sdl = (struct sockaddr_dl *)(ifm + 1);
ptr = (unsigned char *)LLADDR(sdl);
NSString *outstring = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",
*ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
free(buf);
return outstring;
}
////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark Public Methods
- (NSString *) uniqueDeviceIdentifier{
NSString *macaddress = [[UIDevice currentDevice] macaddress];
NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];
NSString *stringToHash = [NSString stringWithFormat:@"%@%@",macaddress,bundleIdentifier];
NSString *uniqueIdentifier = [stringToHash stringFromMD5];
return uniqueIdentifier;
}
- (NSString *) uniqueGlobalDeviceIdentifier{
NSString *macaddress = [[UIDevice currentDevice] macaddress];
NSString *uniqueIdentifier = [macaddress stringFromMD5];
return uniqueIdentifier;
}
@end
NSString + MD5Addition.m:
#import "NSString+MD5Addition.h"
#import <CommonCrypto/CommonDigest.h>
@implementation NSString(MD5Addition)
- (NSString *) stringFromMD5{
if(self == nil || [self length] == 0)
return nil;
const char *value = [self UTF8String];
unsigned char outputBuffer[CC_MD5_DIGEST_LENGTH];
CC_MD5(value, strlen(value), outputBuffer);
NSMutableString *outputString = [[NSMutableString alloc] initWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
for(NSInteger count = 0; count < CC_MD5_DIGEST_LENGTH; count++){
[outputString appendFormat:@"%02x",outputBuffer[count]];
}
return [outputString autorelease];
}
@end
获得UDID的有效方法:
Launch a web server inside the app with two pages: one should return specially crafted MobileConfiguration profile and another should collect UDID. More info here, here and here. You open the first page in Mobile Safari from inside the app and it redirects you to Settings.app asking to install configuration profile. After you install the profile, UDID is sent to the second web page and you can access it from inside the app. (Settings.app has all necessary entitlements and different sandbox rules).
一个使用RoutingHTTPServer的例子:
import UIKit
import RoutingHTTPServer
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var bgTask = UIBackgroundTaskInvalid
let server = HTTPServer()
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
application.openURL(NSURL(string: "http://localhost:55555")!)
return true
}
func applicationDidEnterBackground(application: UIApplication) {
bgTask = application.beginBackgroundTaskWithExpirationHandler() {
dispatch_async(dispatch_get_main_queue()) {[unowned self] in
application.endBackgroundTask(self.bgTask)
self.bgTask = UIBackgroundTaskInvalid
}
}
}
}
class HTTPServer: RoutingHTTPServer {
override init() {
super.init()
setPort(55555)
handleMethod("GET", withPath: "/") {
$1.setHeader("Content-Type", value: "application/x-apple-aspen-config")
$1.respondWithData(NSData(contentsOfFile: NSBundle.mainBundle().pathForResource("udid", ofType: "mobileconfig")!)!)
}
handleMethod("POST", withPath: "/") {
let raw = NSString(data:$0.body(), encoding:NSISOLatin1StringEncoding) as! String
let plistString = raw.substringWithRange(Range(start: raw.rangeOfString("<?xml")!.startIndex,end: raw.rangeOfString("</plist>")!.endIndex))
let plist = NSPropertyListSerialization.propertyListWithData(plistString.dataUsingEncoding(NSISOLatin1StringEncoding)!, options: .allZeros, format: nil, error: nil) as! [String:String]
let udid = plist["UDID"]!
println(udid) // Here is your UDID!
$1.statusCode = 200
$1.respondWithString("see https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/iPhoneOTAConfiguration/ConfigurationProfileExamples/ConfigurationProfileExamples.html")
}
start(nil)
}
}
下面是udid.mobileconfig的内容:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>PayloadContent</key>
<dict>
<key>URL</key>
<string>http://localhost:55555</string>
<key>DeviceAttributes</key>
<array>
<string>IMEI</string>
<string>UDID</string>
<string>PRODUCT</string>
<string>VERSION</string>
<string>SERIAL</string>
</array>
</dict>
<key>PayloadOrganization</key>
<string>udid</string>
<key>PayloadDisplayName</key>
<string>Get Your UDID</string>
<key>PayloadVersion</key>
<integer>1</integer>
<key>PayloadUUID</key>
<string>9CF421B3-9853-9999-BC8A-982CBD3C907C</string>
<key>PayloadIdentifier</key>
<string>udid</string>
<key>PayloadDescription</key>
<string>Install this temporary profile to find and display your current device's UDID. It is automatically removed from device right after you get your UDID.</string>
<key>PayloadType</key>
<string>Profile Service</string>
</dict>
</plist>
配置文件安装将失败(我没有费心实现预期的响应，请参阅文档)，但应用程序将获得正确的UDID。你还应该在mobileconfig上签名。
看看这个，
我们可以使用Keychain来代替NSUserDefaults类，来存储CFUUIDCreate创建的UUID。
这样我们就可以避免重新安装UUID， 即使用户卸载并重新安装，也始终为同一应用程序获得相同的UUID。
用户重置设备时将重新创建UUID。
我用SFHFKeychainUtils尝试了这种方法，它的工作就像一个魅力。
