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// AFNetworkReachabilityManager.h
//
// Copyright (c) 2013-2014 AFNetworking (http://afnetworking.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import <Foundation/Foundation.h>
#import <SystemConfiguration/SystemConfiguration.h>
typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
AFNetworkReachabilityStatusUnknown = -1,
AFNetworkReachabilityStatusNotReachable = 0,
AFNetworkReachabilityStatusReachableViaWWAN = 1,
AFNetworkReachabilityStatusReachableViaWiFi = 2,
};
/**
`AFNetworkReachabilityManager` monitors the reachability of domains, and addresses for both WWAN and WiFi network interfaces.
Reachability can be used to determine background information about why a network operation failed, or to trigger a network operation retrying when a connection is established. It should not be used to prevent a user from initiating a network request, as it's possible that an initial request may be required to establish reachability.
See Apple's Reachability Sample Code (https://developer.apple.com/library/ios/samplecode/reachability/)
@warning Instances of `AFNetworkReachabilityManager` must be started with `-startMonitoring` before reachability status can be determined.
*/
@interface AFNetworkReachabilityManager : NSObject
/**
The current network reachability status.
*/
@property (readonly, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;
/**
Whether or not the network is currently reachable.
*/
@property (readonly, nonatomic, assign, getter = isReachable) BOOL reachable;
/**
Whether or not the network is currently reachable via WWAN.
*/
@property (readonly, nonatomic, assign, getter = isReachableViaWWAN) BOOL reachableViaWWAN;
/**
Whether or not the network is currently reachable via WiFi.
*/
@property (readonly, nonatomic, assign, getter = isReachableViaWiFi) BOOL reachableViaWiFi;
///---------------------
/// @name Initialization
///---------------------
/**
Returns the shared network reachability manager.
*/
+ (instancetype)sharedManager;
/**
Creates and returns a network reachability manager for the specified domain.
@param domain The domain used to evaluate network reachability.
@return An initialized network reachability manager, actively monitoring the specified domain.
*/
+ (instancetype)managerForDomain:(NSString *)domain;
/**
Creates and returns a network reachability manager for the socket address.
@param address The socket address (`sockaddr_in`) used to evaluate network reachability.
@return An initialized network reachability manager, actively monitoring the specified socket address.
*/
+ (instancetype)managerForAddress:(const void *)address;
/**
Initializes an instance of a network reachability manager from the specified reachability object.
@param reachability The reachability object to monitor.
@return An initialized network reachability manager, actively monitoring the specified reachability.
*/
- (instancetype)initWithReachability:(SCNetworkReachabilityRef)reachability;
///--------------------------------------------------
/// @name Starting & Stopping Reachability Monitoring
///--------------------------------------------------
/**
Starts monitoring for changes in network reachability status.
*/
- (void)startMonitoring;
/**
Stops monitoring for changes in network reachability status.
*/
- (void)stopMonitoring;
///-------------------------------------------------
/// @name Getting Localized Reachability Description
///-------------------------------------------------
/**
Returns a localized string representation of the current network reachability status.
*/
- (NSString *)localizedNetworkReachabilityStatusString;
///---------------------------------------------------
/// @name Setting Network Reachability Change Callback
///---------------------------------------------------
/**
Sets a callback to be executed when the network availability of the `baseURL` host changes.
@param block A block object to be executed when the network availability of the `baseURL` host changes.. This block has no return value and takes a single argument which represents the various reachability states from the device to the `baseURL`.
*/
- (void)setReachabilityStatusChangeBlock:(void (^)(AFNetworkReachabilityStatus status))block;
@end
///----------------
/// @name Constants
///----------------
/**
## Network Reachability
The following constants are provided by `AFNetworkReachabilityManager` as possible network reachability statuses.
enum {
AFNetworkReachabilityStatusUnknown,
AFNetworkReachabilityStatusNotReachable,
AFNetworkReachabilityStatusReachableViaWWAN,
AFNetworkReachabilityStatusReachableViaWiFi,
}
`AFNetworkReachabilityStatusUnknown`
The `baseURL` host reachability is not known.
`AFNetworkReachabilityStatusNotReachable`
The `baseURL` host cannot be reached.
`AFNetworkReachabilityStatusReachableViaWWAN`
The `baseURL` host can be reached via a cellular connection, such as EDGE or GPRS.
`AFNetworkReachabilityStatusReachableViaWiFi`
The `baseURL` host can be reached via a Wi-Fi connection.
### Keys for Notification UserInfo Dictionary
Strings that are used as keys in a `userInfo` dictionary in a network reachability status change notification.
`AFNetworkingReachabilityNotificationStatusItem`
A key in the userInfo dictionary in a `AFNetworkingReachabilityDidChangeNotification` notification.
The corresponding value is an `NSNumber` object representing the `AFNetworkReachabilityStatus` value for the current reachability status.
*/
///--------------------
/// @name Notifications
///--------------------
/**
Posted when network reachability changes.
This notification assigns no notification object. The `userInfo` dictionary contains an `NSNumber` object under the `AFNetworkingReachabilityNotificationStatusItem` key, representing the `AFNetworkReachabilityStatus` value for the current network reachability.
@warning In order for network reachability to be monitored, include the `SystemConfiguration` framework in the active target's "Link Binary With Library" build phase, and add `#import <SystemConfiguration/SystemConfiguration.h>` to the header prefix of the project (`Prefix.pch`).
*/
extern NSString * const AFNetworkingReachabilityDidChangeNotification;
extern NSString * const AFNetworkingReachabilityNotificationStatusItem;
///--------------------
/// @name Functions
///--------------------
/**
Returns a localized string representation of an `AFNetworkReachabilityStatus` value.
*/
extern NSString * AFStringFromNetworkReachabilityStatus(AFNetworkReachabilityStatus status);
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