AFNetworking使用總結
AFNetworking使用總結
分享類型：游戲開發相關
1 將AFNetWorking文件夾導入項目
2 添加類庫 Security.framework、MobileCoreServices.framework、SystemConfiguration.framework
3 在使用的地方 #import "AFNetworking.h"
解決編譯時警告：
- 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項目中使用時，對AFNetWorking的所有.m文件添加“-fobjc-arc”
在使用ARC項目中，使用“不使用ARC”的類庫時，對類庫的.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)根據基本的URL構造除完整的一個URL，然后通過這個完整的URL獲得一個NSURL對象，然后根據這個url獲得一個NSURLRequest。
(2)AFJSONRequestOperation是一個完整的類，整合了從網絡中獲取數據并對JSON進行解析。
(3)當請求成功，則運行成功塊。在本例中，把解析出來的天氣數據從JSON變量轉換為一個字典(dictionary)，并將其存儲在字典中。
(4)如果運行出問題了，則運行失敗塊(failure block)，比如網絡不可用。如果failure block被調用了，將會通過提示框顯示錯誤信息。
6.AFNetWorking異步加載圖片
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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請求
(1).構建一個baseURL，以及一個參數字典，并將這兩個變量傳給AFHTTPClient.
(2).將AFJSONRequestOperation注冊為HTTP的操作, 這樣就可以跟之前的示例一樣，可以獲得解析好的JSON數據。
(3).做了一個GET請求，這個請求有一對block：success和failure。
(4).POST請求跟GET一樣
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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，請求方式可以創建一個類繼承AFHTTPClient ，官方的例子就是這樣寫的。
狀態欄設置
在Appdelegate里面的 - (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法中添加 [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];用來給用戶做出網絡訪問的提示。
請求超時設置
timeout和參數都是在NSURLRequest/NSMutableURLRequest設置的
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- NSMutableURLRequest *request = [client requestWithMethod:@"GET" path:@"/" parameters:nil];//這里的parameters:參數就是你的第二個問題如何設置參數
- [request setTimeoutInterval:120];
- AFHTTPRequestOperation *operation = [client HTTPRequestOperationWithRequest:request success:^{...} failure:^{...}];
- [client enqueueHTTPRequestOperation:operation];
如果你是繼承了AFHTTPClient
就需要override一個方法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; }
這個時候的參數設置是調用
- [self postPath:@"" parameters:nil //參數
- 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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