iOS应用开发中AFNetworking库的常用HTTP操作方法小结
准备
首先，你需要将afnetworking 框架包含到工程中。如果你还没有afnetworking的话，在这里下载最新的版本：
https://github.com/afnetworking/afnetworking
当你解压出下载的文件后，你将看到其中有一个afnetworking子文件夹，里面全是.h 和 .m 文件, 如下高亮显示的:
将afnetworking拖拽到xcode工程中.
当出现了添加文件的选项时，确保勾选上copy items into destination group's folder (if needed) 和 create groups for any added folders.
将afnetworking添加到预编译头文件，意味着这个框架会被自动的添加到工程的所有源代码文件中。
常用方法介绍
方法一：get 请求
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 请求
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
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：创建一个下载文件任务
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：创建一个上传文件任务
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];
方法六：创建一个上传文件任务并显示进度
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：创建一个上传数据data任务
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];
方法八：获取网络状态
[[afnetworkreachabilitymanager sharedmanager] setreachabilitystatuschangeblock:^(afnetworkreachabilitystatus status) {
nslog(@"reachability: %@", afstringfromnetworkreachabilitystatus(status));
}];
方法九： http manager reachability
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请求
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
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：获取请求的一些信息(我也没有用过，不太常用)
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
{"foo": "bar", "baz": [1,2,3]}