iOS監控網絡狀態並實時刷新界面數據

前言

APP項目中須要實時的檢測網絡狀態是必須的，並且檢測的框架不少如Reachability、AFNetworking以及RealReachability，本文所寫的內容是採用RealReachability，今天內容的重點並非實時監控網絡狀態變化，而是檢測到網絡變化實時刷新界面數據。

 

框架設計；

（1）不可或缺的網絡狀態監控以及網絡狀態保存，每次網絡發生改變都發出通知；

（2）在基類XPQBaseViewController裏面接收廣播通知，經過傳遞過來的網絡狀態作相應的邏輯處理。

 

如何使用；

（1）封裝好的網絡監測單例類，每次網絡發生改變，都會發出kLocalNetWorkChagnedNotofication通知；代碼中的hasNet屬性最好放在其餘的單例類中，好比系統配置類AppContext等。

#import <Foundation/Foundation.h>

@interface NetWorkUtils : NSObject

+ (instancetype)sharedNetWorkUtils;

- (void)autoCheckNetWork;

@end


#import "NetWorkUtils.h"
#import <RealReachability.h>
#import "GlobeConst.h"

@interface NetWorkUtils ()

@property (nonatomic, assign) BOOL hasNet;

@end

@implementation NetWorkUtils

+ (instancetype)sharedNetWorkUtils
{
    static dispatch_once_t onceNetWorkToken;
    static NetWorkUtils *netWorkUtils;
    
    dispatch_once(& onceNetWorkToken, ^{
        netWorkUtils = [[NetWorkUtils alloc] init];
    });
    return netWorkUtils;
}

- (void)autoCheckNetWork
{
    [GLobalRealReachability startNotifier];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkChanged:) name:kRealReachabilityChangedNotification object:nil];
}

- (void)networkChanged:(NSNotification *)notification
{
    RealReachability *reachability = (RealReachability *)notification.object;
    ReachabilityStatus status = [reachability currentReachabilityStatus];
    
    switch (status) {
        case RealStatusNotReachable: {
            self.hasNet = NO;
            [[NSNotificationCenter defaultCenter] postNotificationName:NSLocalNetWorkChagnedNotoficationKey object:nil userInfo:@{
                                                                                                           @"netType": @"RealStatusNotReachable"
                                                                                                           }];
            break;
        }
        case RealStatusUnknown: {
            self.hasNet = YES;
            [[NSNotificationCenter defaultCenter] postNotificationName:NSLocalNetWorkChagnedNotoficationKey object:nil userInfo:@{
                                                                                                           @"netType": @"RealStatusUnknown"
                                                                                                           }];
            break;
        }
        case RealStatusViaWiFi: {
            self.hasNet = YES;
            [[NSNotificationCenter defaultCenter] postNotificationName:NSLocalNetWorkChagnedNotoficationKey object:nil userInfo:@{
                                                                                @"netType": @"RealStatusViaWiFi"                                                           }];
            break;
        }
        case RealStatusViaWWAN: {
            self.hasNet = YES;
            [[NSNotificationCenter defaultCenter] postNotificationName:NSLocalNetWorkChagnedNotoficationKey object:nil userInfo:@{
                                                                                                           @"netType": @"RealStatusViaWWAN"                                                            }];
            break;
        }
        default:
            break;
    }
}

@end

 

（2）公共基類XPQBaseViewController，接收kLocalNetWorkChagnedNotofication通知，並執行- (void)refreshLoadDataBase:(NSNotification *)notification方法；子類經過繼承XPQBaseViewController結合業務需求在refreshLoadDataBase方法中，實現相應的業務邏輯。

#import <UIKit/UIKit.h>

@interface XPQBaseViewController : UIViewController

- (void)refreshLoadDataBase:(NSNotification *)notification;

@end


#import "XPQBaseViewController.h"
#import "GlobeConst.h"

@interface XPQBaseViewController ()

@end

@implementation XPQBaseViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshLoadDataBase:) name:NSLocalNetWorkChagnedNotoficationKey object:nil];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)refreshLoadDataBase:(NSNotification *)notification {
    
    NSLog(@"開始從新加載網絡數據");
}

- (void)dealloc {
    
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSLocalNetWorkChagnedNotoficationKey object:nil];
}

@end

 

總結；

RealReachability檢測網絡狀態框架除了自動檢測，其實還能夠手動檢測，對於有在發起網絡請求時須要實時檢測網絡鏈接狀況的業務需求，RealReachability使用是比較方便的。