iOS常用網路要求方法詳解

這個常用的網路要求方法優勢有：

1.get和post都可調用此方法
2.在UIViewController類裡直接用self指標即可調用（因為這個方法是寫在UIViewController分類裡的），在其他類只需用[UIViewController new]產生個指標即可進行網路請求
3.只需要傳入三個參數
4.代碼邏輯簡單易於理解
5.基於AFNetworking3.1.0

相關代碼:

建立一個繼承於AFHTTPSessionManager，名為AFAppDotNetAPIClient的類

代碼如下

複製代碼

//AFAppDotNetAPIClient.h   #import <Foundation/Foundation.h> #import <AFNetworking/AFNetworking.h> @interface AFAppDotNetAPIClient : AFHTTPSessionManager   //建立單例類的方法聲明 + (instancetype)sharedClient;   @end   //AFAppDotNetAPIClient.m   #import "AFAppDotNetAPIClient.h"   @implementation AFAppDotNetAPIClient   //建立單例類的方法實現 + (instancetype)sharedClient{     //初始化一個靜態類指標     static AFAppDotNetAPIClient *sharedClient;     static dispatch_once_t onceToken;     dispatch_once(&onceToken, ^{         sharedClient = [AFAppDotNetAPIClient new];                  //AFNetworking要求標頭資訊相關設定         sharedClient.requestSerializer = [AFJSONRequestSerializer serializer];         [sharedClient.requestSerializer setValue:@"application/json;charset=utf-8" forHTTPHeaderField:@"Content-Type"];                  //AFNetworking擷取到的參數相關設定         sharedClient.responseSerializer = [AFJSONResponseSerializer serializer];         sharedClient.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/html", @"text/javascript", nil];         //SSL相關設定         sharedClient.securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone];     });          return sharedClient; } @end

寫在UIViewController分類裡的網路要求方法：

代碼如下

複製代碼

- (NSURLSessionDataTask *)defaultRequestwithURL: (NSString *)URL withParameters: (NSDictionary *)parameters withMethod: (NSString *)method withBlock:(void (^)(NSDictionary *dict, NSError *error))block {     //預設列印傳入的實參 #ifdef DEBUG     NSLog(@"common method = %@", method);//get 或 post     NSLog(@"common URL = %@", URL);//所請求的網址     NSLog(@"common parameters = %@", parameters);//傳入的參數 #endif          //根據method字串判斷調用AFNetworking裡的get方法還是post方法     if ( [method isEqualToString:@"GET"] ) {//所用到的是AFNetworking3.1.0裡的方法，其新加了progress進度block         return [[AFAppDotNetAPIClient sharedClient] GET:URL parameters:parameters progress:^(NSProgress * _Nonnull downloadProgress) {           } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable JSON) {     #ifdef DEBUG             NSLog(@"common get json = %@", JSON);//列印擷取到的json     #endif                          NSDictionary *dict = JSON;//直接返回字典，方便使用                          if (block) {                 block(dict, nil);             }         } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {             //如果請求出錯返回空字典和NSError指標             if (block) {                 block([NSDictionary dictionary], error);//這一點算是比較坑的地方了，因為比如我要根據一個欄位來判斷是否請求成功，我對一個空字典@{}， //根據一個key取value：[@{} objectForKey:@"errorCode"]， //然後判斷字串的intValue是否等於0:[[@{} objectForKey:@"errorCode"] intValue] == 0是返回1的。 //我想的解決辦法就是從伺服器端來改，返回的欄位key用isSuccess，value是字串True或False即可解決， //但是這樣又只能知道成功或失敗並不能根據errorCode碼進行其他動作，因為errorCode可以為0、1、2、3等等。             }                          //從指標級判斷error是否為空白，如果不為空白就列印error             if (error) {                 NSLog(@"%@",error);             }         }];     }       //post相關代碼     return [[AFAppDotNetAPIClient sharedClient]POST:URL parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {              } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable JSON) {     #ifdef DEBUG         NSLog(@"common post json = %@", JSON);//列印擷取到的json     #endif                  NSDictionary *dict = JSON;//直接返回字典，方便使用                  if (block) {             block(dict, nil);         }     } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {         //如果請求出錯返回空字典和NSError指標         if (block) {             block([NSDictionary dictionary], error);         }                  //從指標級判斷error是否為空白，如果不為空白就列印error         if (error) {             NSLog(@"%@",error);         }     }];          //傳回值暫時用不到，不需要建立變數接收；傳進的self指標也沒有用到所以這個方法可移植性很強 } -(void)request {     //測試網路要求方法     //1.所用到的網址是本人以前抓到的，API是用php寫的，伺服器很穩定，我常用來測試，也僅供測試     //2.get參數 start和end傳不帶正負號的整數     NSDictionary *parameters = @{                                  @"type":@"list",                                  @"city":@"2",                                  @"lid":@"31",                                  @"sortby":@"1",                                  @"start":@"0",                                  @"end":@"3"                                  };        [self defaultRequestwithURL:@"/api.php" withParameters:parameters withMethod:@"GET" withBlock:^(NSDictionary *dict, NSError *error) {       }]; }

額外附送多圖上傳方法，同樣基於AFNetworking3.1.0，和以上方法類似所以不加詳解注釋了:

代碼如下

複製代碼

-(void)startMultiPartUploadTaskWithURL:(NSString *)url                            imagesArray:(NSArray *)images                      parameterOfimages:(NSString *)parameter                         parametersDict:(NSDictionary *)parameters                       compressionRatio:(float)ratio                           succeedBlock:(void (^)(NSDictionary *dict))succeedBlock                            failedBlock:(void (^)(NSError *error))failedBlock{     if (images.count == 0) {         NSLog(@"圖片數組計數為零");         return;     }     for (int i = 0; i < images.count; i++) {         if (![images[i] isKindOfClass:[UIImage class]]) {             NSLog(@"images中第%d個元素不是UIImage對象",i+1);         }     }          AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];          [manager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {         int i = 0;         //根據當前系統時間產生圖片名稱         NSDate *date = [NSDate date];         NSDateFormatter *formatter = [[NSDateFormatter alloc]init];         [formatter setDateFormat:@"yyyy年MM月dd日"];         NSString *dateString = [formatter stringFromDate:date];                  for (UIImage *image in images) {             NSString *fileName = [NSString stringWithFormat:@"%@%d.png",dateString,i];             NSData *imageData;             if (ratio > 0.0f && ratio < 1.0f) {                 imageData = UIImageJPEGRepresentation(image, ratio);             }else{                 imageData = UIImageJPEGRepresentation(image, 1.0f);             }             [formData appendPartWithFileData:imageData name:parameter fileName:fileName mimeType:@"image/jpg/png/jpeg"];         }     } progress:^(NSProgress * _Nonnull uploadProgress) {              } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {         NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];                  NSLog(@"common post json = %@", dict);                  succeedBlock(dict);     } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {         if (error) {             failedBlock(error);                          NSLog(@"%@",error);         }     }]; }