iOS - 第三方框架 - AFN

#5、AFNetworking 2.6使用方法

>2.6版本 支持 iOS7以上，而且支持NSURLConnectionOperation

>3.0版本 支持 iOS7以上 NSURLConnectionOperation被废弃了
```

//获取网络请求管理器

AFHTTPRequestOperationManager * manager = [AFHTTPRequestOperationManager manager];
```

###1) 执行get请求
```

//GET 请求地址
//parameters 请求参数
//success 请求成功的回调方法
//failure 请求失败的回调方法

//responseObject 返回请求成功获得的数据
//AFN 可以帮我们自动解析json

```

###2）执行get请求2
```

// parameters 一般是字典

NSDictionary * params = @{@"username":@"haha",@"password":@“123"};

AFHTTPRequestOperationManager * manager = [AFHTTPRequestOperationManager manager];

[manager GET:@"http://192.168.1.200/login.php" parameters:params success:^(AFHTTPRequestOperation * _Nonnull operation, id _Nonnull responseObject) {

NSLog(@"%@",responseObject);

} failure:^(AFHTTPRequestOperation * _Nonnull operation, NSError * _Nonnull error) {

NSLog(@"%@",error);

}];

*将GET 改为POST 则为执行POST请求*
```

###3）解析xml
```

AFHTTPRequestOperationManager * manager = [AFHTTPRequestOperationManager manager];

manager.requestSerializer = [AFHTTPRequestSerializer serializer];
//改成AFXMLParserResponseSerializer 格式
manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
//设置可以响应的类型
// manager.responseSerializer.acceptableContentTypes

[manager GET:@"http://192.168.1.2/train.xml" parameters:nil success:^(AFHTTPRequestOperation * _Nonnull operation, id _Nonnull responseObject) {

NSLog(@"%@",responseObject);

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

```
###4）上传data

```
POST 上传地址
parameters 文本参数
constructingBodyWithBlock 上传文件的block,有可能多次调用
success 上传成功
failure 上传失败
[manager POST:@"http://192.168.1.200/post/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) {

formData 上传的数据
FileData 上传文件的data
name 上传文件的key
FileURL 本地路径
fileName 服务器上的名字
mimeType 上传资源的类型

NSURL * url = [[NSBundle mainBundle] URLForResource:@"111.png" withExtension:nil];

//上传文件

[formData appendPartWithFileURL:url name:@"userfile00" fileName:@"2016030211459.png" mimeType:@"image/png" error:NULL];

//上传data
[formData appendPartWithFileData:data name:@"userfile00" fileName:@"123" mimeType:@"image/png"];

} success:^(AFHTTPRequestOperation * _Nonnull operation, id _Nonnull responseObject) {
NSLog(@"%@",responseObject);
} failure:^(AFHTTPRequestOperation * _Nonnull operation, NSError * _Nonnull error) {
NSLog(@"%@",error);
}];

```

#6、AFNetworking 3.0使用方法
###1、AFNetworking3.0 和AFNetworking2.6的部分区别

>3.0版本删除了所有的 NSURLConnection 方法

>并将所有的AFHTTPRequestOperationManager 改为 AFHTTPSessionManager

>AFHTTPSessionManager * manager1 = [AFHTTPSessionManager manager];

>AFURLSessionManager *manager2 = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

>AFURLSessionManager ≈ NSURLSession
设置manager2的同时需要设置NSURLSessionConfiguration

###2、具体方法

#####1）监测网络
```

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

NSLog(@"Reachability: %@“,AFStringFromNetworkReachabilityStatus(status));

}];

[[AFNetworkReachabilityManager sharedManager] startMonitoring];
```

#####2）上传文件
```

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://192.168.1.200/post/upload.php" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
{
[formData appendPartWithFileURL:[[NSBundle mainBundle] URLForResource:@"111.png" withExtension:nil] name:@"userfile00" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
} error:nil];

NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:nil completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {

if (error) {
NSLog(@"Error: %@", error);
} else {
NSLog(@"%@ %@", response, responseObject);
}

}];
[uploadTask resume];
```

#####3）下载文件
```

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:[@"http://192.168.1.2/demo.json" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {

//下载地址
NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];

NSLog(@"%@",[documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]]);

return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];

}
completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error)
{
NSLog(@"File downloaded to: %@", filePath);
}];
//filePath == [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]

[downloadTask resume];

```