iOS: UUID and SSKeyChain

需要加入SSKeyChain文件

传送门:SSKeyChain

//
//  UniqueIDCreater.h
//  Housemart
//
//  Created by Haozhen Li on 13-9-26.
//  Copyright (c) 2013年 refineit.com.cn. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "SSKeychain.h"

@interface UniqueIDCreater : NSObject

+ (NSString *)uuid;
@end

//
//  UniqueIDCreater.m
//  Housemart
//
//  Created by Haozhen Li on 13-9-26.
//  Copyright (c) 2013年 refineit.com.cn. All rights reserved.
//

#import "UniqueIDCreater.h"

@implementation UniqueIDCreater

#define kServiceKey @"com.housemart.housemart"
#define kAccountKey @"user"

+ (NSString *)uuid
{
    NSString *_uuid = nil;
    _uuid = [SSKeychain passwordForService:kServiceKey account:kAccountKey];
    if (_uuid == nil) {
        CFUUIDRef theUUID = CFUUIDCreate(NULL);
        CFStringRef string = CFUUIDCreateString(NULL, theUUID);
        CFRelease(theUUID);

        _uuid = [(NSString *)string autorelease];
        [SSKeychain setPassword:_uuid forService:kServiceKey account:kAccountKey];
    }

//    NSLog(@"[%@ %@] = %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), _uuid);

    return _uuid;
}
@end