AFNetworking是一個非常方便的網絡請求庫，可以輕松實現各種網絡請求，比如經常使用的GET請求、POST請求，以及上傳多張圖片等，下面介紹一下基本的使用方法。

• 首先下載AFNetworking 然后在需要使用的類中，導入如下2個頭文件：

#import?"AFNetworking.h"//主要用于網絡請求方法 #import?"UIKit+AFNetworking.h"//里面有異步加載圖片的方法

• GET請求網絡數據方式：

-(void)obtainData {//?啟動系統風火輪[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?YES;//前面寫服務器給的域名,后面拼接上需要提交的參數，假如參數是key＝1?NSString?*domainStr?=?@"http://192.168.1.69/xffcol/index.php/Api/key/1/";AFHTTPRequestOperationManager?*manager?=?[AFHTTPRequestOperationManager?manager];manager.responseSerializer?=?[AFHTTPResponseSerializer?serializer];//以get的形式提交，只需要將上面的請求地址給GET做參數就可以[manager?GET:domainStr?parameters:nil?success:^(AFHTTPRequestOperation?*operation,?id?responseObject)?{//?隱藏系統風火輪[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;//json解析NSDictionary?*resultDic?=?[NSJSONSerialization?JSONObjectWithData:responseObject?options:NSJSONReadingMutableLeaves?error:nil];NSLog(@"---獲取到的json格式的字典--%@",resultDic);}?failure:^(AFHTTPRequestOperation?*operation,?NSError?*error)?{//?解析失敗隱藏系統風火輪(可以打印error.userInfo查看錯誤信息)[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;}]; }

• POST請求網絡數據方式:

-(void)obtainData {//?啟動系統風火輪[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?YES;//服務器給的域名??NSString?*domainStr?=?@"http://192.168.1.69/xffcol/index.php/Api/";//假如需要提交給服務器的參數是key＝1,class_id=100//創建一個可變字典NSMutableDictionary?*parametersDic?=?[NSMutableDictionary?dictionary];//往字典里面添加需要提交的參數[parametersDic?setObject:@"1"?forKey:@"key"];[parametersDic?setObject:@"100"?forKey:@"class_id"];AFHTTPRequestOperationManager?*manager?=?[AFHTTPRequestOperationManager?manager];manager.responseSerializer?=?[AFHTTPResponseSerializer?serializer];//以post的形式提交，POST的參數就是上面的域名，parameters的參數是一個字典類型，將上面的字典作為它的參數[manager?POST:domainStr?parameters:parametersDic?success:^(AFHTTPRequestOperation?*operation,?id?responseObject)?{//?隱藏系統風火輪[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;//json解析NSDictionary?*resultDic?=?[NSJSONSerialization?JSONObjectWithData:responseObject?options:NSJSONReadingMutableLeaves?error:nil];NSLog(@"---獲取到的json格式的字典--%@",resultDic);}?failure:^(AFHTTPRequestOperation?*operation,?NSError?*error)?{//?解析失敗隱藏系統風火輪(可以打印error.userInfo查看錯誤信息)[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;}]; }

• 實現上傳多張圖片：

-(void)uploadPictures{//域名NSString?*domainStr?=?@"http://192.168.1.69/xffcol/index.php/Api/";AFHTTPRequestOperationManager?*manager?=?[AFHTTPRequestOperationManager?manager];manager.responseSerializer?=?[AFHTTPResponseSerializer?serializer];//如果還需要上傳其他的參數，參考上面的POST請求，創建一個可變字典，存入需要提交的參數內容，作為parameters的參數提交[manager?POST:domainStr?parameters:nil?constructingBodyWithBlock:^(id<AFMultipartFormData>?formData){//_imageArray就是圖片數組，我的_imageArray里面存的都是圖片的data，下面可以直接取出來使用，如果存的是image，將image轉換data的方法如下：NSData?*imageData?=?UIImageJPEGRepresentation(image,?0.7);if?(_imageArray.count?>?0?){for(int?i?=?0;i?<?_imageArray.count;i?++){NSData?*data=_imageArray[i];//上傳的參數名NSString?*name?=?[NSString?stringWithFormat:@"%d",i];//上傳的filenameNSString?*fileName?=?[NSString?stringWithFormat:@"%@.jpg",name];[formData?appendPartWithFileData:dataname:namefileName:fileNamemimeType:@"image/jpeg"];}}}success:^(AFHTTPRequestOperation?*operation,?id?responseObject){//關閉系統風火輪[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;//json解析NSDictionary?*?resultDic?=?[NSJSONSerialization?JSONObjectWithData:responseObject?options:NSJSONReadingMutableLeaves?error:nil];NSLog(@"---resultDic--%@",resultDic);}failure:^(AFHTTPRequestOperation?*operation,?NSError?*error)?{//?解析失敗[UIApplication?sharedApplication].networkActivityIndicatorVisible?=?NO;?????????}]; }

• 設置網絡圖片的方法：

[leftView?setImageWithURL:[NSURL?URLWithString:@"http://pic25.nipic.com/20121205/5955207_182136452000__2.jpg"]?placeholderImage:@"這里是網絡圖片還沒加載出來的時候，顯示的默認圖片"];

?

GET請求

?

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; [manager GET:URL parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { NSLog(@"這里打印請求成功要做的事"); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { NSLog(@"%@",error); //這里打印錯誤信息 }];

POST 請求

?

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];NSMutableDictionary *parameters = @{@"":@"",@"":@""}; [manager POST:URL parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) { } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { }];

---

暫時用的比較多的就這兩個，用到其他的 再來更新！！

最近又用到了下載，索性 上傳下載都研究了一下 ，補充進來

補充試用AFN3.0下載方法

/*** AFN3.0 下載*/ - (void)downLoad{//1.創建管理者對象AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];//2.確定請求的URL地址NSURL *url = [NSURL URLWithString:@""]; //3.創建請求對象 NSURLRequest *request = [NSURLRequest requestWithURL:url]; //下載任務 NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) { //打印下下載進度 WKNSLog(@"%lf",1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount); } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) { //下載地址 WKNSLog(@"默認下載地址:%@",targetPath); //設置下載路徑，通過沙盒獲取緩存地址，最后返回NSURL對象 NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject]; return [NSURL URLWithString:filePath]; } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) { //下載完成調用的方法 WKNSLog(@"下載完成："); WKNSLog(@"%@--%@",response,filePath); }]; //開始啟動任務 [task resume]; }

AFN3.0 上傳

/*** AFN 3.0 上傳* 有兩種方式* upLoad1 和 upLoad2*///第一種方法是通過工程中的文件進行上傳 - (void)upLoad1{//1。創建管理者對象AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];//2.上傳文件 NSDictionary *dict = @{@"username":@"1234"}; NSString *urlString = @"22222"; [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) { //上傳文件參數 UIImage *iamge = [UIImage imageNamed:@"123.png"]; NSData *data = UIImagePNGRepresentation(iamge); //這個就是參數 [formData appendPartWithFileData:data name:@"file" fileName:@"123.png" mimeType:@"image/png"]; } progress:^(NSProgress * _Nonnull uploadProgress) { //打印下上傳進度 WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount); } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { //請求成功 WKNSLog(@"請求成功：%@",responseObject); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { //請求失敗 WKNSLog(@"請求失敗：%@",error); }]; } //第二種是通過URL來獲取路徑，進入沙盒或者系統相冊等等 - (void)upLoda2{ //1.創建管理者對象 AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; //2.上傳文件 NSDictionary *dict = @{@"username":@"1234"}; NSString *urlString = @"22222"; [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) { [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"文件地址"] name:@"file" fileName:@"1234.png" mimeType:@"application/octet-stream" error:nil]; } progress:^(NSProgress * _Nonnull uploadProgress) { //打印下上傳進度 WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount); } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { //請求成功 WKNSLog(@"請求成功：%@",responseObject); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { //請求失敗 WKNSLog(@"請求失敗：%@",error); }]; }

監測當前網絡狀態（網絡監聽）

- (void)AFNetworkStatus{//1.創建網絡監測者AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];/*枚舉里面四個狀態 分別對應 未知 無網絡 數據 WiFitypedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {AFNetworkReachabilityStatusUnknown = -1, 未知AFNetworkReachabilityStatusNotReachable = 0, 無網絡AFNetworkReachabilityStatusReachableViaWWAN = 1, 蜂窩數據網絡AFNetworkReachabilityStatusReachableViaWiFi = 2, WiFi};*/[manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {//這里是監測到網絡改變的block 可以寫成switch方便//在里面可以隨便寫事件 switch (status) { case AFNetworkReachabilityStatusUnknown: WKNSLog(@"未知網絡狀態"); break; case AFNetworkReachabilityStatusNotReachable: WKNSLog(@"無網絡"); break; case AFNetworkReachabilityStatusReachableViaWWAN: WKNSLog(@"蜂窩數據網"); break; case AFNetworkReachabilityStatusReachableViaWiFi: WKNSLog(@"WiFi網絡"); break; default: break; } }] ; }

轉載于:https://www.cnblogs.com/zhun/p/5535376.html

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