iOS應(yīng)用開(kāi)發(fā)中AFNetworking庫(kù)的常用HTTP操作方法小結(jié)

更新時(shí)間：2016年05月16日 15:27:15 投稿：goldensun

AFNetworking庫(kù)是Objective-C語(yǔ)言寫(xiě)成的用于處理HTTP的第三方庫(kù),在GitHub上開(kāi)源并且一直在被更新和維護(hù),下面就一起來(lái)看一下iOS應(yīng)用開(kāi)發(fā)中AFNetworking庫(kù)的常用HTTP操作方法小結(jié)

準(zhǔn)備
首先，你需要將AFNetworking 框架包含到工程中。如果你還沒(méi)有AFNetworking的話，在這里下載最新的版本：
https://github.com/AFNetworking/AFNetworking
當(dāng)你解壓出下載的文件后，你將看到其中有一個(gè)AFNetworking子文件夾，里面全是.h 和 .m 文件, 如下高亮顯示的:

2016516152538410.jpg (238×500)

將AFNetworking拖拽到Xcode工程中.

2016516152554241.jpg (700×474)

當(dāng)出現(xiàn)了添加文件的選項(xiàng)時(shí)，確保勾選上Copy items into destination group's folder (if needed) 和 Create groups for any added folders.
將AFNetworking添加到預(yù)編譯頭文件，意味著這個(gè)框架會(huì)被自動(dòng)的添加到工程的所有源代碼文件中。

常用方法介紹
方法一：GET 請(qǐng)求

復(fù)制代碼代碼如下:

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);

}];

方法二：POST 請(qǐng)求

復(fù)制代碼代碼如下:

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);

}];

方法三：POST Multi-Part Request

復(fù)制代碼代碼如下:

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<AFMultipartFormData> formData) {

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

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

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

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

    NSLog(@"Error: %@", error);

}];

方法四：創(chuàng)建一個(gè)下載文件任務(wù)

復(fù)制代碼代碼如下:

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

NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
    NSLog(@"File downloaded to: %@", filePath);
}];
[downloadTask resume];

方法五：創(chuàng)建一個(gè)上傳文件任務(wù)

復(fù)制代碼代碼如下:

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];

方法六：創(chuàng)建一個(gè)上傳文件任務(wù)并顯示進(jìn)度

復(fù)制代碼代碼如下:

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
} error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSProgress *progress = nil;

NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        NSLog(@"%@ %@", response, responseObject);
    }
}];
[uploadTask resume];

方法七：創(chuàng)建一個(gè)上傳數(shù)據(jù)data任務(wù)

復(fù)制代碼代碼如下:

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];

方法八：獲取網(wǎng)絡(luò)狀態(tài)

復(fù)制代碼代碼如下:

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

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

}]; 

方法九： HTTP Manager Reachability

復(fù)制代碼代碼如下:

NSURL *baseURL = [NSURL URLWithString:@"http://example.com/"];
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:baseURL];

NSOperationQueue *operationQueue = manager.operationQueue;
[manager.reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    switch (status) {
        case AFNetworkReachabilityStatusReachableViaWWAN:
        case AFNetworkReachabilityStatusReachableViaWiFi:
            [operationQueue setSuspended:NO];
            break;
        case AFNetworkReachabilityStatusNotReachable:
        default:
            [operationQueue setSuspended:YES];
            break;
    }
}];

[manager.reachabilityManager startMonitoring];

方法十：AFHTTPRequestOperation的GET請(qǐng)求

復(fù)制代碼代碼如下:

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];

方法十一：Batch of Operations

復(fù)制代碼代碼如下:

NSMutableArray *mutableOperations = [NSMutableArray array];
for (NSURL *fileURL in filesToUpload) {
    NSURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> 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];

方法十二：獲取請(qǐng)求的一些信息(我也沒(méi)有用過(guò)，不太常用)

復(fù)制代碼代碼如下:

Request Serialization

Request serializers create requests from URL strings, encoding parameters as either a query string or HTTP body.

NSString *URLString = @"http://example.com";
NSDictionary *parameters = @{@"foo": @"bar", @"baz": @[@1, @2, @3]};
Query String Parameter Encoding

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"GET" URLString:URLString parameters:parameters error:nil];

GET http://example.com?foo=bar&baz[]=1&baz[]=2&baz[]=3
URL Form Parameter Encoding

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters];

POST http://example.com/
Content-Type: application/x-www-form-urlencoded

foo=bar&baz[]=1&baz[]=2&baz[]=3
JSON Parameter Encoding

[[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters];

POST http://example.com/
Content-Type: application/json