add .gitignore

msext/QiniuSDK/Http/QNUserAgent.h

@@ -0,0 +1,37 @@
+//
+//  QNUserAgent.h
+//  QiniuSDK
+//
+//  Created by bailong on 14-9-29.
+//  Copyright (c) 2014年 Qiniu. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+/**
+ *    UserAgent
+ *
+ */
+
+@interface QNUserAgent : NSObject
+
+/**
+ *    用户id
+ */
+@property (copy, nonatomic, readonly) NSString *id;
+
+/**
+ *    UserAgent 字串
+ */
+- (NSString *)description;
+
+/**
+ *    UserAgent + AK 字串
+ */
+- (NSString *)getUserAgent:(NSString *)access;
+
+/**
+ *  单例
+ */
++ (instancetype)sharedInstance;
+@end