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：
- 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”
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- 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
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- [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
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- [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
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- 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
- - (NSMutableURLRequest *)requestWithMethod:(NSString *)method path:(NSString *)path parameters:(NSDictionary *)parameters{
- NSMutableURLRequest *request = [super requestWithMethod:method path:path parameters:parameters];
- [request setTimeoutInterval:15];
- return request; }
这个时候的参数设置是调用
- [self postPath:@"" parameters:nil //参数
- success:^(AFHTTPRequestOperation *operation, id responseObject) {
- if (success) {
- success((AFJSONRequestOperation *)operation, responseObject);
- }
- } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
- if (failure) {
- failure((AFJSONRequestOperation *)operation, error);
- }
- }];
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