码迷,mamicode.com
首页 > Web开发 > 详细

AFNetworking使用总结

时间:2015-08-11 15:27:49      阅读:177      评论:0      收藏:0      [点我收藏+]

标签:

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: 
 
Prefix.pch文件中加入 
#import <SystemConfiguration/SystemConfiguration.h> 
#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”

 

[plain] view plaincopy 
 

      static NSString*const BaseURLString = @"http://www.raywenderlich.com/downloads/weather_sample/";    

 

          // 1      NSString *weatherUrl = [NSStringstringWithFormat:@"%@weather.php?format=json",BaseURLString];      NSURL *url = [NSURLURLWithString:weatherUrl];      NSURLRequest *request = [NSURLRequestrequestWithURL:url];       // 2      AFJSONRequestOperation *operation =      [AFJSONRequestOperationJSONRequestOperationWithRequest:request                                                success:^(NSURLRequest*request, NSHTTPURLResponse *response, id JSON) {                                                   //                                                   NSDictionary*dicWeather = (NSDictionary *)JSON;                                                   NSLog(@"result:%@",dicWeather);                                                }                                                failure:^(NSURLRequest*request, NSHTTPURLResponse *response, NSError *error, id JSON) {                                                   UIAlertView*alertView = [[UIAlertView alloc] initWithTitle:@"Error RetrievingWeather"                                                                                                 message:[NSStringstringWithFormat:@"%@",error]                                                                                                delegate:self                                                                                        cancelButtonTitle:@"OK"                                                                                        otherButtonTitles: nil];                                                   [alertView show];                                                }];      // 5      [operation start];   

 

      (1)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。 

 

       

 

      6.AFNetWorking异步加载图片 


[plain]

       

view plaincopy

       

 

       

 

      [list=1](1)#import “UIImageView+AFNetworking.h”  (2)UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(40, 80, 40, 40)];      __weak UIImageView *_imageView = imageView;      [imageViewsetImageWithURLRequest:[[NSURLRequest alloc] initWithURL:[NSURLURLWithString:@"http://www.worldweatheronline.com/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];   

 

       7.GET 和POST请求 

 

      (1).构建一个baseURL,以及一个参数字典,并将这两个变量传给AFHTTPClient. 

 

      (2).将AFJSONRequestOperation注册为HTTP的操作, 这样就可以跟之前的示例一样,可以获得解析好的JSON数据。 

 

      (3).做了一个GET请求,这个请求有一对block:success和failure。 

 

      (4).POST请求跟GET一样 


[plain]

       

view plaincopy

       

 

       

 

      [list=1]AFHTTPClient *client= [[AFHTTPClient alloc] initWithBaseURL:baseURL];  [clientregisterHTTPOperationClass:[AFJSONRequestOperation class]];  [clientsetDefaultHeader:@"Accept" value:@"application/json"];  [client postPath:@"weather.php"                parameters:parameters                  success:^(AFHTTPRequestOperation *operation, id responseObject) {                       self.weather =responseObject;                       self.title = @"HTTPPOST";                       [self.tableViewreloadData];                   }                  failure:^(AFHTTPRequestOperation *operation, NSError*error) {                       UIAlertView *av =[[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"                                                                   message:[NSStringstringWithFormat:@"%@",error]                                                                  delegate:nil                                                         cancelButtonTitle:@"OK" otherButtonTitles:nil];                       [av show];                    }           ];    

 

      [client getPath:@"weather.php"               parameters:parameters                 success:^(AFHTTPRequestOperation *operation, id responseObject) {                      self.weather =responseObject;                      self.title = @"HTTP GET";                      [self.tableViewreloadData];                  }                 failure:^(AFHTTPRequestOperation *operation, NSError*error) {                      UIAlertView *av =[[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"                                                                   message:[NSStringstringWithFormat:@"%@",error]                                                                 delegate:nil                                                        cancelButtonTitle:@"OK" otherButtonTitles:nil];                      [av show];    

 

                      }           ];   

 

       

 

      另外,请求方式可以创建一个类继承AFHTTPClient ,官方的例子就是这样写的。 

 

       

 

      状态栏设置 

 

        在Appdelegate里面的 - (BOOL)application:(UIApplication *)application  

 

          didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法中添加 [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];用来给用户做出网络访问的提示。 

 

       

 

      请求超时设置 

 

      timeout和参数都是在NSURLRequest/NSMutableURLRequest设置的  

 

复制代码 
[list=1]
  • NSMutableURLRequest *request = [client requestWithMethod:@"GET" path:@"/" parameters:nil];//这里的parameters:参数就是你的第二个问题如何设置参数
  • [request setTimeoutInterval:120];
  • AFHTTPRequestOperation *operation = [client HTTPRequestOperationWithRequest:request success:^{...} failure:^{...}];
  • [client enqueueHTTPRequestOperation:operation];
 
        

 

        

 

      如果你是继承了AFHTTPClient  

 

      就需要override一个方法requestWithMethod  

 

复制代码
  1. - (NSMutableURLRequest *)requestWithMethod:(NSString *)method path:(NSString *)path parameters:(NSDictionary *)parameters{   
  2. NSMutableURLRequest *request = [super requestWithMethod:method path:path parameters:parameters];   
  3. [request setTimeoutInterval:15];   
  4. return request; }
 
        

 

      这个时候的参数设置是调用  

 

复制代码
  1. [self postPath:@"" parameters:nil //参数
  2.            success:^(AFHTTPRequestOperation *operation, id responseObject) {
  3.                if (success) {
  4.                    success((AFJSONRequestOperation *)operation, responseObject);
  5.                }
  6.            } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
  7.                if (failure) {
  8.                    failure((AFJSONRequestOperation *)operation, error);
  9.                }
  10.            }];

AFNetworking使用总结

标签:

原文地址:http://www.cnblogs.com/sunnyke/p/4720766.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!