AFNetworking使用总结

来源：互联网发布：mac连接打印机编辑：程序博客网时间：2024/05/20 18:19

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"

4.解决编译警告：

<span style="font-size:14px;"><em>Prefix.pch文件中加入#import <SystemConfiguration/SystemConfiguration.h>#import <MobileCoreServices/MobileCoreServices.h></em></span>

5.JSON数据解析

（1）根据基本的URL构造出完整的一个URL，让后通过这个完整的URL获得一个NSURL对象，然后根据这个url获得一个NSURLRequest。

（2）AFNJSONRequestOperation是一个完整的类，整合了送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，在本例子中将一个JSON变量转换为一个字典，并将其存在字典中。

（4）如果失败，则运行失败块，比如网络不可用

<pre name="code" class="objc"><span style="font-size:14px;">static NSString *const BaseURLString = @"http://www.raywenderlich.com/downloads/weather_sample";/*1*/NSString *weatherUrl = [NSString stringWithFormat:@"%@weather.php?format=json", BaseURLString];NSURL *url = [NSURL URLWithString:weatherUrl];NSURLRequest *request = [NSURLRequest requestWithURL:url];                                          /*2.3.4*/AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:requestsuccess:^(NSURLRequest * request, NSHTTPURLResponse *response, id JSON) {NSDictonary *dicWeather = (NSDictonary *)JSON; NSLog(@"result:%@", dicWeather); } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *rror, id JSON) { UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error RetrievingWether" message:[NSString stringWithFormat :@"%@", error] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; }]; [operation start];</span>

6.AFNetworking异步加载图片

<span style="font-size:14px;">// 1#imptort "UIImageView+AFNetworking.h"// 2UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(40, 80, 40, 40)];__weak UIImageView *_imageView;[imageView setImageWithURLRequest:[[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://www.worldweatheronline.com/images/wsymbols01_png_64/wstmbol_0001_sunny.png"]] placeholderImage:[UIImage imageNamed:@"placeholder.png"] success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {_imageView.image;[_imageView setNeedsDisplay];} failure:^(NSURLRequest *request, NSHTTPURLResponse Response, NSError *error) {}];[self.view addSubview:imageView];</span>

7.GET和POST请求

（1）构建一个baseURL，以及一个参数字典，并将这两个变脸传给AFHTTPClient。

（2）将AFJSONRequestOpreation注册为HTTP的操作，这样就可以和之前示例一样，获得解析好的JSON数据

（3）做一个GET请求，这个请求有一对block：success和failure。

（4）POST请求和GET一样

<span style="font-size:14px;">AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];[client registerHTTPOperationClass:[AFJSONRequestOperation class]];[client setDefeultHeader:@"Accept" value:@"application/json"];[client postPath:@"weather.php" parameters:parameters success:^(AFNHTTPRequestOperation *operation, id responseObject) {self.weather = responseObject;self.title = @"HTTPPOST";[self.tableView reloadData];} failure:^(AFHTTPRequestOperation *operation, NSError *error) {UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather" message:[NSString stringWithFormat:@"%@", 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.tableView reloadData];} failure:^(AFHTTPRequestOperation *operation, NSError *error) {UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather" message:[NSString stringWithFormat:@"%@", error] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];[av show];}];</span>

8.状态栏设置

在Appdelegate里面的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法中添加

[AFNetworkActivityIndicatorManager shareManager] setEnabled:YES]; // 用来给用户做出网络访问提示。

9.请求超时设置

（1）timeout和参数都是在NSURLRequest/NSMutableURLRequest设置的

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];

（2）如果你是继承了AFHTTPClient 就需要override一个方法requestWithMethod

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method path:(NSString *)path parameters:(NSDictionary *)parameters {NSMutableURLRequest *request = [super requestWithMethod:method path:path parameters:parameters];[request setTimeoutInterval:15];return request;}

（3）这个时候参数设置是调用

[self postPath:@"" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {if (success) {succes((AFJSONRequestOperation *)operation, responseObject);}} failure:^(AFJSONRequestOperation *operation, NSError *error) {if (failure) {failure((SFJSONRequestOperation *)operation, error);}}];

0 0