如何选择AFNetworking版本

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如何选择AFNetworking版本

官网下载2.5版本:http://afnetworking.com/

此文章基于AFNetworking2.0,如果您使用的是2.5版本的,请看这篇文章:AFNetworking2.5使用

首先得下载AFNetworking库文件,下载时得首先弄清楚,你将要开发的软件兼容的最低版本是多少。AFNetworking 2.0或者之后的版本需要xcode5.0版本并且只能为IOS6或更高的手机系统上运行,如果开发MAC程序,那么2.0版本只能在MAC OS X 10.8或者更高的版本上运行。

AFNetworking 2.0的下载地址https://github.com/AFNetworking/AFNetworking

如果你想要兼容IOS5或MAC OS X 10.7,那你需要用最新发布的1.x版本

AFNetworking 1.x的下载地址https://github.com/AFNetworking/AFNetworking/tree/1.x

如果要兼容4.3或者MAC OS X 10.6,需要用最新发布的0.10.x版本

AFNetworking 0.10.xhttps://github.com/AFNetworking/AFNetworking/tree/0.10.x

如何通过URL获取json数据

第一种,利用AFJSONRequestOperation,官方网站上给的例子:

  

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. NSString *str=[NSString stringWithFormat:@"https://alpha-api.app.net/stream/0/posts/stream/global"];  
  2.    NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];  
  3.    NSURLRequest *request = [NSURLRequest requestWithURL:url];  
  4.    //    从URL获取json数据  
  5.    AFJSONRequestOperation *operation1 = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSDictionary* JSON) {  
  6.                NSLog(@"获取到的数据为:%@",JSON);  
  7.    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id data) {  
  8.        NSLog(@"发生错误!%@",error);  
  9.    }];  
  10.    [operation1 start];  
 NSString *str=[NSString stringWithFormat:@"https://alpha-api.app.net/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自带的json解析方法:

 

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. NSString *str=[NSString stringWithFormat:@"https://alpha-api.app.net/stream/0/posts/stream/global"];  
  2.   NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];  
  3.   NSURLRequest *request = [NSURLRequest requestWithURL:url];  
  4.  AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];  
  5.   [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, idresponseObject) {  
  6.       NSString *html = operation.responseString;  
  7.            NSData* data=[html dataUsingEncoding:NSUTF8StringEncoding];  
  8.            id dict=[NSJSONSerialization  JSONObjectWithData:data options:0 error:nil];  
  9.       NSLog(@"获取到的数据为:%@",dict);  
  10.   }failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
  11.       NSLog(@"发生错误!%@",error);  
  12.   }];  
  13.   NSOperationQueue *queue = [[NSOperationQueue alloc] init];  
  14.   [queue addOperation:operation];  
  NSString *str=[NSString stringWithFormat:@"https://alpha-api.app.net/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];             id dict=[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];

如果发生Error Domain=NSURLErrorDomain Code=-1000 "bad URL" UserInfo=0x14defc80 {NSUnderlyingError=0x14deea10 "bad URL", NSLocalizedDescription=bad URL这个错误,请检查URL编码格式。有没有进行stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding


如何通过URL获取图片

异步获取图片,通过队列实现,而且图片会有缓存,在下次请求相同的链接时,系统会自动调用缓存,而不从网上请求数据。

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 100.0f, 100.0f, 100.0f)];      [imageView setImageWithURL:[NSURL URLWithString:@"http://i.imgur.com/r4uwx.jpg"]placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]];      [self.view addSubview:imageView];  
  2. 上面的方法是官方提供的,还有一种方法,  
  3. NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.scott-sherwood.com/wp-content/uploads/2013/01/scene.png"]];  
  4.     AFImageRequestOperation *operation = [AFImageRequestOperation imageRequestOperationWithRequest:request imageProcessingBlock:nil success:^(NSURLRequest *request, NSHTTPURLResponse*response, UIImage *image) {  
  5.         self.backgroundImageView.image = image;  
  6.     } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {  
  7.         NSLog(@"Error %@",error);  
  8.     }];  
  9.    
  10.     [operation start];  
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 100.0f, 100.0f, 100.0f)];      [imageView setImageWithURL:[NSURL URLWithString:@"http://i.imgur.com/r4uwx.jpg"]placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]];      [self.view addSubview:imageView];上面的方法是官方提供的,还有一种方法,NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.scott-sherwood.com/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];

如果使用第一种URLWithString:  placeholderImage:会有更多的细节处理,其实实现还是通过AFImageRequestOperation处理,可以点击URLWithString:  placeholderImage:方法进去看一下就一目了然了。所以我觉得还是用第一种好。


如何通过URL获取plist文件

通过url获取plist文件的内容,用的很少,这个方法在官方提供的方法里面没有

  

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. NSString *weatherUrl = @"http://www.calinks.com.cn/buick/kls/Buickhousekeeper.plist";  
  2.   NSURL *url = [NSURL URLWithString:[weatherUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];  
  3.   NSURLRequest *request = [NSURLRequest requestWithURL:url];  
  4.   [AFPropertyListRequestOperation addAcceptableContentTypes:[NSSet setWithObject:@"text/plain"]];  
  5.   AFPropertyListRequestOperation *operation = [AFPropertyListRequestOperation propertyListRequestOperationWithRequest:request success:^(NSURLRequest *request,NSHTTPURLResponse *response, id propertyList) {  
  6.       NSLog(@"%@",(NSDictionary *)propertyList);  
  7.         
  8.   }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, idpropertyList) {  
  9.       NSLog(@"%@",error);  
  10.   }];  
  11.   
  12.   [operation start];  
  NSString *weatherUrl = @"http://www.calinks.com.cn/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, idpropertyList) {        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

    

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. NSURL *url = [NSURL URLWithString:@"http://113.106.90.22:5244/sshopinfo"];  
  2.     NSURLRequest *request = [NSURLRequest requestWithURL:url];  
  3.     AFXMLRequestOperation *operation =  
  4.     [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest*request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {  
  5.         XMLParser.delegate = self;  
  6.         [XMLParser setShouldProcessNamespaces:YES];  
  7.         [XMLParser parse];  
  8.     }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser*XMLParser) {  
  9.         NSLog(@"%@",error);  
  10.     }];  
  11.     [operation start];  
NSURL *url = [NSURL URLWithString:@"http://113.106.90.22:5244/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

-

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. (void)parserDidStartDocument:(NSXMLParser *)parser{  
  2.     NSLog(@"解析开始!");  
  3. }  
  4. //解析起始标记  
  5. - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary*)attributeDict{  
  6.     NSLog(@"标记:%@",elementName);  
  7.       
  8. }  
  9. //解析文本节点  
  10. - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{  
  11.     NSLog(@"值:%@",string);  
  12. }  
  13. //解析结束标记  
  14. - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{  
  15.     NSLog(@"结束标记:%@",elementName);  
  16. }  
  17. //文档结束时触发  
  18. -(void) parserDidEndDocument:(NSXMLParser *)parser{  
  19.     NSLog(@"解析结束!");  
  20. }  
(void)parserDidStartDocument:(NSXMLParser *)parser{    NSLog(@"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*)attributeDict{    NSLog(@"标记:%@",elementName);    }//解析文本节点- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{    NSLog(@"值:%@",string);}//解析结束标记- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{    NSLog(@"结束标记:%@",elementName);}//文档结束时触发-(void) parserDidEndDocument:(NSXMLParser *)parser{    NSLog(@"解析结束!");}

运行的结果:

如何使用AFHTTPClient进行web service操作

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. 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。  
  2.    BaseURLString = @"http://www.raywenderlich.com/downloads/weather_sample/";  
  3.     NSURL *baseURL = [NSURL URLWithString:[NSString stringWithFormat:BaseURLString]];  
  4.     NSDictionary *parameters = [NSDictionary dictionaryWithObject:@"json" forKey:@"format"];  
  5.     AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];  
  6.       
  7.     [client registerHTTPOperationClass:[AFJSONRequestOperation class]];  
  8.     [client setDefaultHeader:@"Accept" value:@"text/html"];  
  9.     [client postPath:@"weather.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {  
  10.         NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];  
  11.         NSLog(@"POST请求:%@",newStr);  
  12.     }failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
  13.         NSLog(@"%@",error);  
  14.     }];  
  15.       
  16.     [client getPath:@"weather.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {  
  17.         NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];  
  18.         NSLog(@"GET请求:%@",newStr);  
  19.     }failure:^(AFHTTPRequestOperation *operation, NSError *error) {  
  20.         NSLog(@"%@",error);  
  21.     }];  
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 = @"http://www.raywenderlich.com/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.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {        NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];        NSLog(@"POST请求:%@",newStr);    }failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@",error);    }];        [client getPath:@"weather.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {        NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];        NSLog(@"GET请求:%@",newStr);    }failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"%@",error);    }];

运行结果:


如果需要显示网络活动指示器,可以用下面方法:

[objc] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. [AFNetworkActivityIndicatorManager sharedManager].enabled = YES;  
[AFNetworkActivityIndicatorManager sharedManager].enabled = YES;

Error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Request failed: unacceptable content-type: text/html" UserInfo=0x16774de0 {NSErrorFailingURLKey=http://192.168.2.2:8181/ecar/tsp/uploadLocation?CID=781666&serviceType=1, AFNetworkingOperationFailinponseErrorKey= { URL: http://192.168.2.2:8181/ecar/tsp/uploadLocation?CID=781666&serviceType=1 } { status code: 200, headers {

    XXX

 

} }, NSLocalizedDescription=Request failed: unacceptable content-type: text/html}

返回数据格式不对。注销这句话: op.responseSerializer = [AFJSONResponseSerializerserializer];然后将返回的数据自己转换。


demo下载地址:点击打开下载界面

此文章基于AFNetworking2.0,如果您使用的是2.5版本的,请看这篇文章:AFNetworking2.5使用

点击了解YTKNetwork

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