• 獲取AFNetworkReachabilityManager對象

AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];

• 添加網(wǎng)絡狀態(tài)改變的監(jiān)聽

[manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        
        if (status == AFNetworkReachabilityStatusUnknown){
            NSLog(@"未知網(wǎng)絡");
            
            switch (status) {
                
                case AFNetworkReachabilityStatusNotReachable:
                    NSLog(@"無網(wǎng)絡");
                    break;
                case AFNetworkReachabilityStatusReachableViaWiFi:
                    NSLog(@"WiFi網(wǎng)絡");
                    break;
                case AFNetworkReachabilityStatusReachableViaWWAN:
                    NSLog(@"無線網(wǎng)絡");
                    break;
                default:
                    break;
                    
            }
        }
    }];

• 開始監(jiān)聽網(wǎng)絡狀態(tài)

    [manager startMonitoring];

• 補充,通過AFN添加網(wǎng)絡狀態(tài)指示器:

在AppDelegate中導入頭文件:

#import "AFNetworkActivityIndicatorManager.h"

在程序加載完成中:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    [AFNetworkActivityIndicatorManager sharedManager].enabled = YES;
    
    return YES;
}

設置網(wǎng)絡指示器:

1.使用AFN下載圖片太大,有可能不會緩存
2. AFN使用的是系統(tǒng)默認的緩存方案
3.SDWebImage默認是不帶網(wǎng)絡指示器功能的,同類框架中YYWebImage是支持網(wǎng)絡指示器功能的