Obtain the unique identifier (UDID) of the device.

Obtain the unique identifier (UDID) of the device.

After IOS5, to avoid obtaining user information based on UDID, Apple prohibits the use of uniqueIdentifier to obtain UDID. However, some applications still need to differentiate devices based on UDID.

There is a system library IOKit. framework that can obtain the unique identifier of the device.

    NSString *serialNumber = nil;    NSString * path = [[NSBundle mainBundle]pathForResource:@"IOKit.framework" ofType:nil];    const char * a =[path UTF8String];//    void *IOKit = dlopen(a, RTLD_NOW);    void *IOKit = dlopen("/System/Library/Frameworks/IOKit.framework/IOKit", RTLD_NOW);    if (IOKit)    {        mach_port_t *kIOMasterPortDefault = dlsym(IOKit, "kIOMasterPortDefault");        CFMutableDictionaryRef (*IOServiceMatching)(const char *name) = dlsym(IOKit, "IOServiceMatching");        mach_port_t (*IOServiceGetMatchingService)(mach_port_t masterPort, CFDictionaryRef matching) = dlsym(IOKit, "IOServiceGetMatchingService");        CFTypeRef (*IORegistryEntryCreateCFProperty)(mach_port_t entry, CFStringRef key, CFAllocatorRef allocator, uint32_t options) = dlsym(IOKit, "IORegistryEntryCreateCFProperty");        kern_return_t (*IOObjectRelease)(mach_port_t object) = dlsym(IOKit, "IOObjectRelease");                if (kIOMasterPortDefault && IOServiceGetMatchingService && IORegistryEntryCreateCFProperty && IOObjectRelease)        {            mach_port_t platformExpertDevice = IOServiceGetMatchingService(*kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));            if (platformExpertDevice)            {                CFTypeRef platformSerialNumber= IORegistryEntryCreateCFProperty(platformExpertDevice, CFSTR("IOPlatformUUID"), kCFAllocatorDefault, 0);                if (CFGetTypeID(platformSerialNumber) == CFStringGetTypeID())                {                    serialNumber = [NSString stringWithString:(__bridge NSString*)platformSerialNumber];                    CFRelease(platformSerialNumber);                }                IOObjectRelease(platformExpertDevice);            }        }        dlclose(IOKit);    }    return serialNumber;

However, this method can only obtain the UDID on the simulator.

There is another way to get device information, that is, using Apple's MDM

Reference http://www.cnblogs.com/liyy2015/p/6030032.html for details