AFNetWorking

 

1 将AFNetWorking文件夹导入项目

2 添加类库 Security.framework、MobileCoreServices.framework、SystemConfiguration.framework

3 在使用的地方 #import "AFNetworking.h"

解决编译时警告:

  1. Prefix.pch文件中加入  
  2. #import <SystemConfiguration/SystemConfiguration.h>  
  3. #import <MobileCoreServices/MobileCoreServices.h>  

注:AFNetWorking使用了ARC ,在不使用ARC项目中使用时,对AFNetWorking的所有.m文件添加“-fobjc-arc” 

  在使用ARC项目中,使用“不使用ARC”的类库时,对类库的.m文件添加“-fno-objc-arc”

 


 
AFNetwork是一个轻量级的网络请求api类库。是以NSURLConnection, NSOperation和其他方法为基础的。

下面这个例子是用来处理json请求的:
NSURL *url = [NSURL URLWithString:@"https://alpha-api.app.net/stream/0/posts/stream/global"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
    NSLog(@"App.net Global Stream: %@", JSON);
} failure:nil];
[operation start];


常见问题:
1. AFNetworking作用都有哪些?
  NSURLConnection提供了+sendAsynchronousRequest:queue:completionHandler:
                                 和+sendAsynchronousRequest:queue:completionHandler: 
但是AFNetworking提供了更好的功能
*AFURLConnectionOperation和它的子类继承NSOperation的,允许请求被取消,暂停/恢复和由NSOperationQueue进行管理。
*AFURLConnectionOperation也可以让你轻松得完成上传和下载,处理验证,监控上传和下载进度,控制的缓存。
*AFHTTPRequestOperation和它得子类可以基于http状态和内容列下来区分是否成功请求了
*AFNetworking可以将远程媒体数据类型(NSData)转化为可用的格式,比如如JSON,XML,图像和plist。
*AFHTTPClient提供了一个方便的网络交互接口,包括默认头,身份验证,是否连接到网络,批量处理操作,查询字符串参数序列化,以及多种表单请求
*UIImageView+ AFNetworking增加了一个方便的方法来异步加载图像。

2. AFNetworking是否支持缓存?
可以,NSURLCache及其子类提供了很多高级接口用于处理缓存
如果你想将缓存存储再磁盘,推荐使用SDURLCache

3.如何使用AFNetworking上传一个文件?
NSData *imageData = UIImagePNGRepresentation(image);
NSURLRequest *request = [client multipartFormRequestWithMethod:@"POST" path:@"/upload" parameters:nil constructingBodyWithBlock: ^(id formData) {
  [formData appendPartWithFileData:imageData mimeType:@"image/png" name:@"avatar"];
}];


4.如何使用AFNetworking下载一个文件?
先创建一个AFURLConnectionOperation对象,然后再使用它的属性outputStream进行处理
operation.outputStream = [NSOutputStream outputStreamToFileAtPath:@"download.zip" append:NO];

5.如何解决:SystemConfiguration framework not found in project
请导入:

#import <SystemConfiguration/SystemConfiguration.h>
#import <MobileCoreServices/MobileCoreServices.h>



6.当应用程序退出时,如何保持持续的请求?
AFURLConnectionOperation有一个叫setShouldExecuteAsBackgroundTaskWithExpirationHandler:的方法用于处理在应用程序进入后台后,进行持续的请求
[self setShouldExecuteAsBackgroundTaskWithExpirationHandler:^{
}];



一些实例:
1.XML 请求
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.flickr.com/services/rest/?method=flickr.groups.browse&api_key=b6300e17ad3c506e706cb0072175d047&cat_id=34427469792@N01&format=rest"]];
AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
  XMLParser.delegate = self;
  [XMLParser parse];
} failure:nil];
[operation start];


2.图片请求:
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)];
[imageView setImageWithURL:[NSURL URLWithString:@"http://i.imgur.com/r4uwx.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]];

3.图片上传处理,监测上传状态:
NSURL *url = [NSURL URLWithString:@"http://api-base-url.com"];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"avatar.jpg"], 0.5);
NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload" parameters:nil constructingBodyWithBlock: ^(id formData) {
    [formData appendPartWithFileData:imageData name:@"avatar" fileName:@"avatar.jpg" mimeType:@"image/jpeg"];
}];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
    NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
}];
[operation start];


4.在线流媒体请求
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost:8080/encode"]];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.inputStream = [NSInputStream inputStreamWithFileAtPath:[[NSBundle mainBundle] pathForResource:@"large-image" ofType:@"tiff"]];
operation.outputStream = [NSOutputStream outputStreamToMemory];
[operation start];
 
from :http://www.zpluz.com/forum.php?mod=viewthread&tid=2052

 


 

AFNetWorking出现code=-1016错误解决办法

AFNetWorking的JSON解析默认库是使用的AFJSONRequestOperation模式,只支持text/json,application/json,text/javascript,所以如果出现code=-1016错误则说明当前的JSON解析模式是text/html,所以要加上这段代码:

[AFJSONRequestOperation addAcceptableContentTypes:[NSSet setWithObject:@"text/html"]];

让他支持text/html模式就可以解决了

posted @ 2014-12-29 16:12  chengfang  阅读(377)  评论(0编辑  收藏  举报