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  • AFNetworking使用总结

    AFNetworking使用总结

     

    关于AFNetworking使用总结 以及一些错误的解决办法。

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    AFNetworking使用总结

    分享类型:游戏开发相关

    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”

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    1. static NSString*const BaseURLString = @"http://www.raywenderlich.com/downloads/weather_sample/";     
    2.     // 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

    1. [plain] view plaincopy  
    2.   
    3. [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;     
    4.                               [_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

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    1. [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];                    }           ];     
    2. [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];     
    3.                 }           ];    

    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 

    1. [list=1] 
    2. 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 
    3. [request setTimeoutInterval:120]; 
    4. AFHTTPRequestOperation *operation = [client HTTPRequestOperationWithRequest:request success:^{...} failure:^{...}]; 
    5. [client enqueueHTTPRequestOperation:operation]; 

    如果你是继承了AFHTTPClient  

    就需要override一个方法requestWithMethod 

    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 

    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.            }]; 

    本文链接:http://www.cocoachina.com/bbs/read.php?tid=184183

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  • 原文地址:https://www.cnblogs.com/iOS-mt/p/4196558.html
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