AFNetWorking的简单使用.doc

AFNetWorking的简单使用首先，对于AFNetWorking，我们要知道它的框架结构，AFURLConnectionOperation继承于NSObject，AFHTTPRequestOperation继承于AFURLConnectionOperation，然后JSON,XML,plist,Image数据继承于AFHTTPRequestOperation。一，AFNetworking的使用1. 将AFNetWorking文件夹导入项目2. 添加类库 Security.framework、MobileCoreServices.framework、 SystemConfiguration.framework3. 在使用的地方 #import “AFNetworking.h1. 根据基本的URL构造除完整的一个URL，然后通过这个完整的URL获得一个NSURL对象，然后根据这个url获得一个NSURLRequest。 2. AFJSONRequestOperation是一个完整的类，整合了从网络中获取数据并对JSON进行解析。 3. 当请求成功，则运行成功块。在本例中，把解析出来的天气数据从JSON变量转换为一个字典(dictionary)，并将其存储在字典中。 4. 如果运行出问题了，则运行失败块(failure block)，比如网络不可用。如果failure block被调用了，将会通过提示框显示错误信息。例：如何通过URL获取json数据第一种，利用AFJSONRequestOperationNSString *str=NSStringstringWithFormat:/stream/0/posts/stream/global;NSURL *url = NSURL URLWithString:str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding;NSURLRequest *request = NSURLRequest requestWithURL:url;/ 从URL获取json数据AFJSONRequestOperation *operation1 = AFJSONRequestOperation JSONRequestOperationWithRequest:request success:(NSURLRequest*request, NSHTTPURLResponse *response, NSDictionary* JSON) NSLog(获取到的数据为：%,JSON); failure:(NSURLRequest *request,NSHTTPURLResponse *response, NSError *error, id data) NSLog(发生错误！%,error);operation1 start;第二种方法，利用AFHTTPRequestOperation 先获取到字符串形式的数据，然后转换成json格式，将NSString格式的数据转换成json数据，利用IOS5（基本不会使用）自带的json解析方法：NSString *str=NSString stringWithFormat:/stream/0/posts/stream/global;NSURL *url = NSURL URLWithString:str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding;NSURLRequest *request = NSURLRequest requestWithURL:url;AFHTTPRequestOperation *operation = AFHTTPRequestOperation alloc initWithRequest:request;operation setCompletionBlockWithSuccess:(AFHTTPRequestOperation*operation, idresponseObject) NSString *html = operation.responseString;NSData* data=html dataUsingEncoding:NSUTF8StringEncoding;iddict=NSJSONSerialization JSONObjectWithData:data options:0 error:nil;NSLog(获取到的数据为：%,dict);failure:(AFHTTPRequestOperation*operation, NSError *error) NSLog(发生错误！%,error);NSOperationQueue *queue = NSOperationQueue alloc init;queue addOperation:operation;2，AFNetWorking异步加载图片(1)#import “UIImageView+AFNetworking.h” (2)UIImageView *imageView = UIImageView alloc initWithFrame:CGRectMake(40, 80, 40, 40); _weak UIImageView *_imageView = imageView; imageView setImageWithURLRequest:NSURLRequest alloc initWithURL:NSURL URLWithString:/images/wsymbols01_png_64/wsymbol_0001_sunny.png placeholderImage:UIImage imageNamed:placeholder.png success:(NSURLRequest *request,NSHTTPURLResponse *response, UIImage *image) _imageView.image = image; _imageView setNeedsDisplay; failure:(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) ; ; self.view addSubview:imageView;如何通过URL获取图片NSURLRequest *request = NSURLRequestrequestWithURL:NSURLURLWithString:/wp-content/uploads/2013/01/scene.png;AFImageRequestOperation *operation = AFImageRequestOperation imageRequestOperationWithRequest:request imageProcessingBlock:nil success:(NSURLRequest*request, NSHTTPURLResponse *response, UIImage *image) self.backgroundImageView.image = image; failure:(NSURLRequest*request, NSHTTPURLResponse *response, NSError *error) NSLog(Error %,error);operation start;如何通过URL获取plist文件NSString *weatherUrl = /buick/kls/Buickhousekeeper.plist;NSURL *url = NSURL URLWithString:weatherUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding;NSURLRequest *request = NSURLRequest requestWithURL:url;AFPropertyListRequestOperation addAcceptableContentTypes:NSSet setWithObject:text/plain;AFPropertyListRequestOperation *operation = AFPropertyListRequestOperation propertyListRequestOperationWithRequest:request success:(NSURLRequest*request, NSHTTPURLResponse *response, id propertyList) NSLog(%,(NSDictionary *)propertyList);failure:(NSURLRequest *request,NSHTTPURLResponse *response, NSError *error, id propertyList) NSLog(%,error);operation start;如何通过URL获取XML数据xml解析使用AFXMLRequestOperation，需要实现苹果自带的NSXMLParserDelegate委托方法，XML中有一些不需要的协议格式内容，所以就不能像json那样解析，还得实现委托。我之前有想过能否所有的XML链接用一个类处理，而且跟服务端做了沟通，结果很不方便，效果不好。XML大多标签不同，格式也不固定，所以就有问题，使用json就要方便的多。第一步；在.h文件中加入委托NSXMLParserDelegate第二步；在.m文件方法中加入代码NSURL *url = NSURLURLWithString:2:5244/sshopinfo;NSURLRequest *request = NSURLRequest requestWithURL:url;AFXMLRequestOperation *operation =AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:(NSURLRequest*request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) XMLParser.delegate = self;XMLParser setShouldProcessNamespaces:YES;XMLParser parse;failure:(NSURLRequest *request,NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParser) NSLog(%,error);operation start;第三步；在.m文件中实现委托方法/在文档开始的时候触发-(void)parserDidStartDocument:(NSXMLParser *)parserNSLog(解析开始！);/解析起始标记- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDictNSLog(标记：%,elementName);/解析文本节点- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)stringNSLog(值：%,string);/解析结束标记- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qNameNSLog(结束标记：%,elementName);/文档结束时触发-(void) parserDidEndDocument:(NSXMLParser *)parserNSLog(解析结束！);如何使用AFHTTPClient进行web service操作AFHTTPClient处理GET和 POST请求.做网页的朋友们这个方法用的比较多。在要经常调用某个请求时，可以封装，节省资源。BaseURLString = /downloads/weather_sample/;NSURL *baseURL = NSURL URLWithString:NSString stringWithFormat:BaseURLString;NSDictionary *parameters = NSDictionary dictionaryWithObject:json forKey:format;AFHTTPClient *client = AFHTTPClient alloc initWithBaseURL:baseURL;client registerHTTPOperationClass:AFJSONRequestOperation class;client setDefaultHeader:Accept value:text/html;client postPath:weather.phpparameters:parameters success:(AFHTTPRequestOperation *operation,id responseObject) NSString* newStr = NSString alloc initWithData:responseObject encoding:NSUTF8StringEncoding;NSLog(POST请求:%,newStr);failure:(AFHTTPRequestOperation*operation, NSError *error) NSLog(%,error);client getPath:weather.phpparameters:parameters success:(AFHTTPRequestOperation *operation,id responseObject) NSString* newStr = NSString alloc initWithData:responseObject encoding:NSUTF8StringEncoding;NSLog(GET请求：%,newStr);failure:(AFHTTPRequestOperation*operation, NSError *erro