AFNnetworking 快速教程，官方入门教程译

AFNetworking官网入门教程简单翻译，学习

AFNetworking 是一个能够快速使用的ios和mac os x下的网络框架，它是构建在Foundation URL Loading System之上的，封装了网络的抽象层，可以方便的使用，AFNetworking是一个模块化架构，拥有丰富api的框架。

一、HTTP请求与操作：

1、AFHTTPRequestOperationManager:

该类封装与Web应用程序进行通信通过HTTP，包括要求制作，响应序列化，网络可达性监控和安全性，以及要求经营管理的常见模式。

GET 请求：

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

[manager GET:@"http://example.com/resources.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {

    NSLog(@"JSON: %@", responseObject);

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

    NSLog(@"Error: %@", error);

}];

POST 带有表单参数的POST请求：

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

NSDictionary *parameters = @{@"foo": @"bar"};

[manager POST:@"http://example.com/resources.json" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {

    NSLog(@"JSON: %@", responseObject);

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

    NSLog(@"Error: %@", error);

}];

POST Multi-Part格式的表单文件上传请求:

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

NSDictionary *parameters = @{@"foo": @"bar"};

NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];

[manager POST:@"http://example.com/resources.json" parameters:parameters constructingBodyWithBlock:^(id formData) {

    [formData appendPartWithFileURL:filePath name:@"image" error:nil];

} success:^(AFHTTPRequestOperation *operation, id responseObject) {

    NSLog(@"Success: %@", responseObject);

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

    NSLog(@"Error: %@", error);

}];

二、Session管理：

1、AFURLSessionManager：创建和管理制定的NSURLSession对象

2、NSURLSessionConfiguration对象必须实现, , , 协议

创建一个下载任务：

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

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

NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];

NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];

NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {

    if (error) {

        NSLog(@"Error: %@", error);

    } else {

        NSLog(@"Success: %@ %@", response, responseObject);

    }

}];

[uploadTask resume];

创建一个数据流任务:

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

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

NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];

NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDataTask *dataTask = [manager dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {

    if (error) {

        NSLog(@"Error: %@", error);

    } else {

        NSLog(@"%@ %@", response, responseObject);

    }

}];

[dataTask resume];

四、使用AFHTTPRequestOperation

1、AFHTTPRequestOperation是使用HTTP或HTTPS协议的AFURLConnectionOperation的子类。

它封装的获取后的HTTP状态和类型将决定请求的成功与否。

2、虽然AFHTTPRequestOperationManager通常是最好的去请求的方式，但是AFHTTPRequestOpersion也能够单独使用。

通过GET方式：

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

NSURL *URL = [NSURL URLWithString:@"http://example.com/resources/123.json"];

NSURLRequest *request = [NSURLRequest requestWithURL:URL];

AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];

op.responseSerializer = [AFJSONResponseSerializer serializer];

[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

    NSLog(@"JSON: %@", responseObject);

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

    NSLog(@"Error: %@", error);

}];

[[NSOperationQueue mainQueue] addOperation:op];

连续操作多个：

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片

NSMutableArray *mutableOperations = [NSMutableArray array];

for (NSURL *fileURL in filesToUpload) {

    NSURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id formData) {

        [formData appendPartWithFileURL:fileURL name:@"images[]" error:nil];

    }];

    

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    

    [mutableOperations addObject:operation];

}

NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:@[...]progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {

    NSLog(@"%lu of %lu complete", numberOfFinishedOperations, totalNumberOfOperations);

} completionBlock:^(NSArray *operations) {

    NSLog(@"All operations in batch complete");

}];

[[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];