華山論劍之淺談iOS網(wǎng)絡(luò)請求終結(jié)者/網(wǎng)絡(luò)狀況監(jiān)控終結(jié)者--AFNetworking

說到網(wǎng)絡(luò)請求,解析網(wǎng)絡(luò)數(shù)據(jù),網(wǎng)絡(luò)狀況監(jiān)控.我們不免想到AFNetworking這個強大的第三方類庫.今天我就簡單的聊一下AFNetworking的網(wǎng)絡(luò)請求和網(wǎng)絡(luò)情況監(jiān)控.


AFNetworking的網(wǎng)絡(luò)請求

在說AFNetworking請求網(wǎng)絡(luò)數(shù)據(jù)之前,我們先看一下我們用系統(tǒng)自帶的NSURLSession是如何來請求網(wǎng)絡(luò)數(shù)據(jù)的.我就以Get請求為例直接在ViewController中做網(wǎng)絡(luò)請求.請看下面范例代碼

#import "ViewController.h"

//范例接口
#define URLString @"http://s.budejie.com/topic/list/zuixin/10/budejie-android-6.2.7/0-20.json?market=xiaomi&udid=866963025576465&appname=baisibudejie&os=4.4.4&client=android&visiting=&mac=74%3A51%3Aba%3Acc%3A46%3A7d&ver=6.2.7"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];


    NSURL *url = [NSURL URLWithString:URLString];
    
    //設(shè)置請求對象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    //請求網(wǎng)絡(luò)數(shù)據(jù)
    NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
       
        //代碼保護(hù)
        if (!error && nil != data) {
            
            NSLog(@"%@",data);
            
        }
        
    }];

    //開始請求網(wǎng)絡(luò)數(shù)據(jù).
    [dataTask resume];

}

現(xiàn)在看一下AFNetworking中的AFHTTPRequestOperation是如何做網(wǎng)絡(luò)請求的.

#import "ViewController.h"

#import <AFNetworking/AFNetworking.h>

//范例接口
#define URLString @"http://s.budejie.com/topic/list/zuixin/10/budejie-android-6.2.7/0-20.json?market=xiaomi&udid=866963025576465&appname=baisibudejie&os=4.4.4&client=android&visiting=&mac=74%3A51%3Aba%3Acc%3A46%3A7d&ver=6.2.7"


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];


    NSURL *url = [NSURL URLWithString:URLString];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
    
    //請求數(shù)據(jù)
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        
        NSString *dataString = operation.responseString;
        
        NSData *data = [dataString dataUsingEncoding:NSUTF8StringEncoding];
        
        if ( nil != data) {
            
            NSLog(@"%@",data);
            
        }
        
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        NSLog(@"%@",error);
        
        
    }];
    
    //開始請求網(wǎng)絡(luò)數(shù)據(jù)
    [operation start];

}

看到上面AFHTTPRequestOperation的請求網(wǎng)絡(luò)數(shù)據(jù)的時候,頓時覺得 好復(fù)雜,那么AFNetworking對此又進(jìn)一步進(jìn)行了封裝,出現(xiàn)了AFHTTPRequestOperationManager這個類,下面我們就看一下AFHTTPRequestOperationManager是如何請求網(wǎng)絡(luò)數(shù)據(jù)的.

#import "ViewController.h"

#import <AFNetworking/AFNetworking.h>

//范例接口
#define URLString @"http://s.budejie.com/topic/list/zuixin/10/budejie-android-6.2.7/0-20.json?market=xiaomi&udid=866963025576465&appname=baisibudejie&os=4.4.4&client=android&visiting=&mac=74%3A51%3Aba%3Acc%3A46%3A7d&ver=6.2.7"


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    [manager GET:URLString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        
        NSString *dataString = operation.responseString;
        
        NSData *data = [dataString dataUsingEncoding:NSUTF8StringEncoding];
        
        if ( nil != data) {
            
            NSLog(@"%@",data);
            
        }
        
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        NSLog(@"請求失敗!");
        
    }];


}
總結(jié): 使用AFHTTPRequestOperationManager這個類請求網(wǎng)絡(luò)數(shù)據(jù)是不是就簡單了許多呢?從上面可以看出來AFNetworking在做網(wǎng)絡(luò)請求的時候,不但自己添加了子線程請求網(wǎng)絡(luò)數(shù)據(jù),而且更加的簡單使用,大大減少了我們的代碼量.優(yōu)勢突出.


AFNetworking檢測網(wǎng)絡(luò)狀況

我們在做項目的時候,就要把各種網(wǎng)絡(luò)情況分析到,然后做出相應(yīng)的對策.那么我們在我們的項目中如何網(wǎng)絡(luò)狀況的監(jiān)控呢?

方法1:Reachability

首先我們需要導(dǎo)入檢測網(wǎng)絡(luò)狀態(tài)的SystemConfiguration.frame 框架 ,然后在AppDelegate.m中導(dǎo)入 Reachability.h (網(wǎng)上簡單的檢測網(wǎng)絡(luò)的第三方.)
----> 點擊進(jìn)入下載 Reachability 

#import "AppDelegate.h"

#import "Reachability.h"

@interface AppDelegate ()

@property(nonatomic,strong)Reachability *reachability;

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkStateChange) name:kReachabilityChangedNotification object:nil];
    
    self.reachability = [Reachability reachabilityForInternetConnection];
    [self.reachability startNotifier];
    
    return YES;
}



#pragma mark----檢測網(wǎng)絡(luò)狀態(tài)---
- (void)networkStateChange
{
    [self checkNetworkState];
}


//下面都需要于用戶做交互.比如做一個彈窗提醒用戶什么的.
- (void)checkNetworkState
{
    // 1.檢測wifi狀態(tài)
    Reachability *wifi = [Reachability reachabilityForLocalWiFi];
    
    // 2.檢測手機(jī)是否能上網(wǎng)絡(luò)(WIFI\3G\2.5G)
    Reachability *conn = [Reachability reachabilityForInternetConnection];
    
    // 3.判斷網(wǎng)絡(luò)狀態(tài)
    if ([wifi currentReachabilityStatus] != NotReachable) { // 有wifi
        
    } else if ([conn currentReachabilityStatus] != NotReachable) { // 沒有使用wifi, 使用手機(jī)自帶網(wǎng)絡(luò)進(jìn)行上網(wǎng)
        
        
    } else { // 沒有網(wǎng)絡(luò)

        
    }
}

//在ARC環(huán)境下delloc也要釋放觀察者.
-(void)dealloc{
    
    [self.reachability stopNotifier];
    
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    
}
方法2:AFNetworking

如何使用AFNetworking做網(wǎng)絡(luò)監(jiān)控呢?AFNetworkReachabilityManager這個類中自帶著監(jiān)聽網(wǎng)絡(luò)的方法,同時AFNetworkReachabilityManager還擁有一個枚舉,代表著網(wǎng)絡(luò)狀況.

typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
AFNetworkReachabilityStatusUnknown = -1,//未識別的網(wǎng)絡(luò)
AFNetworkReachabilityStatusNotReachable = 0,//不可達(dá)的網(wǎng)絡(luò)(未連接)
AFNetworkReachabilityStatusReachableViaWWAN = 1,//2G,3G,4G...
AFNetworkReachabilityStatusReachableViaWiFi = 2,//wifi網(wǎng)絡(luò)
};
#import "AppDelegate.h"

#import <AFNetworking/AFNetworkReachabilityManager.h>



@interface AppDelegate ()

@property(nonatomic,strong)AFNetworkReachabilityManager *reachabilityManager;

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    //創(chuàng)建網(wǎng)絡(luò)監(jiān)控對象
    self.reachabilityManager = [AFNetworkReachabilityManager sharedManager];
    
    
    //設(shè)置監(jiān)聽
    [_reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case AFNetworkReachabilityStatusUnknown:
                NSLog(@"未識別的網(wǎng)絡(luò)");
                break;
                
            case AFNetworkReachabilityStatusNotReachable:
                NSLog(@"不可達(dá)的網(wǎng)絡(luò)(未連接)");
                break;
                
            case AFNetworkReachabilityStatusReachableViaWWAN:
                NSLog(@"2G,3G,4G...的網(wǎng)絡(luò)");
                break;
                
            case AFNetworkReachabilityStatusReachableViaWiFi:
                NSLog(@"wifi的網(wǎng)絡(luò)");
                break;
            default:
                break;
        }
    }];
    
    //開始監(jiān)聽網(wǎng)絡(luò)狀況.
    [_reachabilityManager startMonitoring];
    
    
    
    
    return YES;
}


-(void)dealloc{
    
    //停止監(jiān)聽網(wǎng)絡(luò)狀況.
    [_reachabilityManager stopMonitoring];
    
}
總結(jié):與Reachability相比之下,AFNetworking是不是代碼更加的簡練呢?AFNetworking其實封裝了Reachability,使我們的代碼更加的簡單易上手.


AFNetworking3.0

現(xiàn)在的AFNetworking已經(jīng)更新到3.0版本,那么在3.0版本的AFNetworking與2.0版本的AFNetworking又有哪些不同呢?

第一條:由于NSURLConnection的API已經(jīng)正式被蘋果棄用.所以AFNetworking有三個類被棄用,這三個類分別是

AFURLConnectionOperation
AFHTTPRequestOperation
AFHTTPRequestOperationManager

第二條: NSURLConnection已經(jīng)被棄用,所以基于NSURLConnection的實現(xiàn)的類已經(jīng)修改成使用NSURLSession進(jìn)行內(nèi)部的實現(xiàn)和封裝.

UIImageView+AFNetworking
UIWebView+AFNetworking
UIButton+AFNetworking

第三條:AFHTTPRequestOperationManager由于被棄用,所以引用了新的類AFHTTPSessionManager,兩者的去唄不大,但是要注意的是block塊中返回的數(shù)據(jù)類型不再是AFHTTPRequestOperation類型,而是NSURLSessionDataTask類型,上面我做測試是使用2.0的AFNetworking,那么我們看一下3.0的是如何請求網(wǎng)絡(luò)數(shù)據(jù)

#import "ViewController.h"

#import <AFNetworking/AFNetworking.h>

//范例接口
#define URLString @"http://s.budejie.com/topic/list/zuixin/10/budejie-android-6.2.7/0-20.json?market=xiaomi&udid=866963025576465&appname=baisibudejie&os=4.4.4&client=android&visiting=&mac=74%3A51%3Aba%3Acc%3A46%3A7d&ver=6.2.7"


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

AFHTTPSessionManager *session = [AFHTTPSessionManager manager];
[session GET:URLString parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) { 

NSLog(@"%@",responseObject);

} failure:^(NSURLSessionDataTask *task, NSError *error) { 

NSLog(@"網(wǎng)絡(luò)請求失敗"); 

}];

}


看完這些 ,您對AFNetworking這個第三方類庫是不是有了新的認(rèn)識呢? 希望這篇文章能對您有所幫助.??

----> 點擊進(jìn)入AFNetworking參考文獻(xiàn)

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