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AFNetworking使用总结

圣杰 2022-05-15 阅读 77

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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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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