ios开发 AFNetworking的基本使用方法

AFNetworking的基本使用方法

什么是GET请求？

如果只是单纯的下载数据, 使用GET请求

什么是POST请求?

特点:  请求的内容不会出现在URL网址中

向服务器发送用户名和密码, 或者上传文件, 使用POST

1.GET请求（html，json，xml）

-(void)testGetRequset
{
    NSString *urlString=@"http://www.baidu.com";
    urlString=@"http://m.weather.com.cn/data/101010100.html";

    //定义AFNetworking管理
    AFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];
    //注意：默认认为数据是JSON，content-type也是JSON，responseObject是解析的字典和数组，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=[AFHTTPResponseSerializer serializer];
    [manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        //responseObject重要参数，包含下载数据
        //NSLog(@"ok = %@",responseObject);
        NSString *str=[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);

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

2.POST请求

-(void)testPostRequset
{
    //POST接口：http://quiet.local/testdir/login.php
    //参数1：@"user":@"quiet"
    //参数2：@"password":@"123"
    NSString *urlString=@"http://quiet.local/testdir/login.php";
    AFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];
    manager.responseSerializer=[AFHTTPResponseSerializer 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": @"tiger",@"password":@""} success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSString *str=[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str = %@",str);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error = %@",error);
    }];
}

3.上传文件（上传图片）

-(void)testUploadFile
{
    NSString *urlString=@"http://quiet.local/uploadtest/upload.php";
    //参数名：image:参数值是图片
    AFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];
    manager.responseSerializer=[AFHTTPResponseSerializer serializer];
    [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        //实现：上传的数据附加到请求体中
        NSString *path=[[NSBundle mainBundle] pathForResource:@"1.jpg" ofType:nil];
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"image" fileName:@"150140.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);
    }];
}

4.下载文件

-(void)testDownloadFile
{
    NSString *urlString = @"http://imgcache.qq.com/club/item/avatar/zip/7/i87/all.zip";
    //创建会话管理器对象（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(@"path = %@",path);
        return [NSURL fileURLWithPath:path];
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
        NSLog(@"下载完成");
    }];

    //启动任务
    [task resume];

}

5.监控网络状态

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

6.图片异步下载（替代SDWebimage）

（1）包含头文件：UIKit+AFNetworking.h

（2）使用：-(void)setimageWithURL:(NSURL *)url

7.有些请求特殊的请求头

例如：BAIDU_WISE_UID=wapp_1428385381699_466;

BAIDU_WISE_UID=wapp_1428385381699_466;

AFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];

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