IOS开发之AFNetworking开源库的使用

1.简介

　　常见的处理网络请求方式

　　(1)NSURLConnection/NSURLsession

　　(2)ASIHttPRequest 早期项目中比较常见, 由于作者不更新了

　　(3)AFNetworking 推荐使用, 项目中使用

　　(4)MKNetworkKit 试试

2.配置和使用

　　2.1 配置 

　　　　库文件拖入工程中, 包含头文件 

　　　　#import "AFNetworking.h"

　　2.2 使用

 　　　　2.2.1.GET请求（html，json，xml）

-(void)testGetRequest{
    
    NSString *urlstring = @"http://www.baidu.com";
    urlstring = @"http://m.weather.com.cn/data/101010100.html";
    urlstring = @"http://mp.manzuo.com/china/beijing/home_2.xml";
    
    //定义AFNetworking管理
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    //注意：默认数据是JSON，content-type也是JSON，responSEObject是解析字典和数组，不是产生错误Code=-1016
    //解决:设置解析器为HTTP形式，下载回来是NSData
    manager.responseSerializer = [AFCompoundResponseSerializer serializer];
    
    [manager GET:urlstring parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
//        responseObject重要参数，包含下载数据
//        NSLog(@"o = %@",responseObject);
        
        NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error = %@",error);
    }];

}

　　　　 2.2.2.POST请求

-(void)testPostRequest{
    //POST接口:
    //参数1:@"user" : @"quiet"
    //参数2:@"passWord" : @"123"
    
    NSString *urlString = @"http://quiet.local/testdir/login.php";
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFCompoundResponseSerializer serializer];
    
    //参数1:传入地址
    //参数2:传入URL请求的参数，格式传入字典
    [manager POST:urlString parameters:@{@"user": @"quiet",@"password" : @"123"} success:^(AFHTTPRequestOperation *operation, id responseObject) {
         NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error = %@",error);
    }];
}

 　　　　2.2.3.上传文件（上传图片）

-(void)testUploadFile{
    
    //POST上传的接口
    NSString *urlString = @"http://quiet.local/uploadtest/pk.php";
    //参数名:image : 参数值是图片
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFCompoundResponseSerializer serializer];
    
    [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        NSString *path = [[NSBundle mainBundle]pathForResource:@"daji.jpg" ofType:nil];
        
        [formData appendPartWithFileURL:[NSURL URLWithString:path] name:@"image" fileName:@"666.jpg" mimeType:@"image/jpeg" error:nil];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
         NSLog(@"error = %@",error);
    }];
    
    
    [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
        //实现:上传的数据附加到请求体中
        //fileName:上传后的文件名
        //mimeType:需要上网搜索mime，把相应的格式复制过来
        NSString *path = [[NSBundle mainBundle]pathForResource:@"daji.jpg" ofType:nil];
    
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"image" fileName:@"666.jpg" mimeType:@"image/jpeg" error:nil];
        
        } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error = %@",error);
    }];
    
}

　　　　 2.2.4.下载文件

-(void)testDownloadFile{
    NSString *urlString = @"http://imgcache.QQ.com/club/item/avatar/zip/7/i87/all.zip";
    
    //创建会话管理对象（通过默认配置）
    AFURLSessionManager *manager = [[AFURLSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]] progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
        
        //返回文件保存的位置
        NSString *path = [NSString stringWithFormat:@"%@/Documents/all.zip",NSHomeDirectory()];
        NSLog(@"%@",NSHomeDirectory());
        return [NSURL fileURLWithPath:path];
        
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
        NSLog(@"下载完成");
    }];
    
    //启动任务
    [task resume];
    
}

　　　　 2.2.5.监控网络状态

-(void)testMonitorNetworkStatus{
    
    AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc]initWithBaseURL:[NSURL URLWithString:@"www.baidu.com"]];
    [manager.reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        NSDictionary *dict = @{
            @(AFNetworkReachabilityStatusUnknown): @"未知",
            @(AFNetworkReachabilityStatusNotReachable): @"不可达",
            @(AFNetworkReachabilityStatusReachableViaWWAN): @"GPRS",
            @(AFNetworkReachabilityStatusReachableViaWiFi): @"Wifi",
            };
        NSLog(@"状态为 %@",dict[@(status)]);
        
    }];
    //开启状态监视
    [manager.reachabilityManager startMonitoring];

}

 　　　　2.2.6.图片异步功能（替代SDWebImage）

    　　　　　　导入头文件

　　　　　　　　　　#import "UIKit+AFNetworking.h"

    　　　　　　- (void)setImageWithURL:(NSURL *)url;

 　　　　2.2.7.有一些特殊的请求头

    　　　　 BAIDU_WISE_UID=wapp_1428385381699_466;

　　    　　 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];　　

　　   　　  [manager.requestSerializer setValue:@"wapp_1428385381699_466" forHTTPHeaderField:@"BAIDU_WISE_UID"];