iOS 開發指南 第15章 訪問Web Service之使用輕量級網路請求架構MKNetworkKIt

標籤：

除蘋果提供的NSURLConnection和NSURLRequest外第三方的網路架構

1 安裝和配置MKNetworkKit架構

   下載並開啟MKNetworkKit目錄添加MKNetworkKit檔案夾到新工程中－添加支援的類庫或架構 CFNetwork.framework SystemConfiguration.framework Security.framework-添加先行編譯標頭檔

   ＃ifndef MyNotes/MyNotes-Prefix.pch

   ＃define MyNotes/MyNotes-Prefix.pch

   ＃import <Foundation/foundation.h>

   ＃endif

2 網路請求

   MKNetworkOperation：封裝了請求相應的類，我們需要為每一個網路請求建立一個MKNetworkOperation。

   MKNetworkEngine：負責管理網路隊列，簡單請求時直接使用，複雜情況時可以子類化MKNetworkEngine。

  1）實現GET請求

/* * 開始請求Web Service */-(void)startRequest{   佈建要求路徑，它是主機名稱（網域名稱或ip地址）之後的內容。    NSString *path = [[NSString alloc] initWithFormat:@"/service/mynotes/WebService.php?email=%@&type=%@&action=%@",@"<你的51work6.com使用者郵箱>",@"JSON",@"query"];    建立MKNetworkEngine對象，參數是主機名稱和要求標頭，主機名稱前面不加http或www。    MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];
    建立MKNetworkOperation對象，參數是主機名稱之後的內容。其他參數有params：請求參數 httpMethod：指定要求方法 ssl：是否使用ssl加密請求    MKNetworkOperation *op = [engine operationWithPath:path];        指定請求閉包，成功回調第一個代碼塊，失敗回調第二個。    [op addCompletionHandler:^(MKNetworkOperation *operation) {    擷取從伺服器返回的NSData類資料 字串 responseImage
    NSLog(@"responseData : %@", [operation responseString]);
    NSData *data  = [operation responseData];
    解析資料  
    NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];        [self reloadView:resDict];            } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {        NSLog(@"MKNetwork請求錯誤 : %@", [err localizedDescription]);    }];
    開始發起請求    [engine enqueueOperation:op];    }

2）實現POST請求

/* * 開始請求Web Service */-(void)startRequest{    NSString *path = [[NSString alloc] initWithFormat:@"/service/mynotes/WebService.php?email=%@&type=%@&action=%@",@"<你的51work6.com使用者郵箱>",@"JSON",@"query"];為MKNetworkOperation指定請求參數    NSMutableDictionary *param = [[NSMutableDictionary alloc] init];    [param setValue:@"<你的51work6.com使用者郵箱>" forKey:@"email"];    [param setValue:@"JSON" forKey:@"type"];    [param setValue:@"query" forKey:@"action"];            MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];    MKNetworkOperation *op = [engine operationWithPath:path params:param httpMethod:@"POST"];        [op addCompletionHandler:^(MKNetworkOperation *operation) {                NSLog(@"responseData : %@", [operation responseString]);        NSData *data  = [operation responseData];        NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];        [self reloadView:resDict];            } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {        NSLog(@"MKNetwork請求錯誤 : %@", [err localizedDescription]);    }];    [engine enqueueOperation:op];    }

3 下載資料

  MKNetworkOperation類不僅可以指定下載檔案的位置，還可以獲得下載的進度。

- (IBAction)onClick:(id)sender {    擷取緩衝目錄    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);    NSString *cachesDirectory = paths[0];    NSString *downloadPath = [cachesDirectory stringByAppendingPathComponent:@"test1.jpg"];        NSString *path = [[NSString alloc] initWithFormat:@"/service/download.php?email=%@&FileName=test1.jpg",@"<你的51work6.com使用者郵箱>"];    path = [path stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];    MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];    MKNetworkOperation *downloadOperation = [engine operationWithPath:path params:nil httpMethod:@"POST"];
    添加NSOutputStream輸出資料流對象，它指定下載圖片的位置。    [downloadOperation addDownloadStream:[NSOutputStream outputStreamToFileAtPath:downloadPath append:TRUE]];    將下載進度進行日誌輸出    [downloadOperation onDownloadProgressChanged:^(double progress) {        NSLog(@"download progress: %.2f%%", progress*100.0);        _progressView.progress = progress;    }];    閉包    [downloadOperation addCompletionHandler:^(MKNetworkOperation *operation) {                NSLog(@"download file finished!");        NSData *data = [operation responseData];                if (data) {            //返回資料失敗            NSError *eror;            NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&eror];            if (!resDict) {                NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"];                                NSString *errorStr = [resultCodeObj errorMessage];                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"錯誤資訊"                                                                    message:errorStr                                                                   delegate:nil                                                          cancelButtonTitle:@"OK"                                                          otherButtonTitles: nil];                [alertView show];            }        } else {            //返回資料成功            UIImage *img = [UIImage imageWithContentsOfFile:downloadPath];            _imageView1.image = img;        }                    } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {        NSLog(@"MKNetwork請求錯誤 : %@", [err localizedDescription]);    }];        [engine enqueueOperation:downloadOperation];}

4 上傳資料

- (IBAction)onClick:(id)sender {        NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test2" ofType:@"jpg"];            NSString *path = [[NSString alloc] initWithFormat:@"/service/upload.php"];        NSMutableDictionary *param = [[NSMutableDictionary alloc] init];    [param setValue:@"<你的51work6.com使用者郵箱>" forKey:@"email"];        MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];    MKNetworkOperation *op = [engine operationWithPath:path params:param httpMethod:@"POST"];    提供要上傳的檔案路徑和檔案類型    [op addFile:filePath forKey:@"file"];
    凍結操作：斷網時儲存資料 連網後自動上傳儲存的資料    [op setFreezable:YES];        [op addCompletionHandler:^(MKNetworkOperation *operation) {                NSLog(@"Upload file finished!");        NSData *data = [operation responseData];                if (data) {                        NSError *eror;            NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&eror];            if (resDict) {解析好的資料                NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"];                                NSString *errorStr = [resultCodeObj errorMessage];自訂                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"錯誤資訊"                                                                    message:errorStr                                                                   delegate:nil                                                          cancelButtonTitle:@"OK"                                                          otherButtonTitles: nil];                [alertView show];                return ;            }        }        [self seeImage];                    } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {        NSLog(@"MKNetwork請求錯誤 : %@", [err localizedDescription]);    }];    [engine enqueueOperation:op];}

 

iOS 開發指南 第15章 訪問Web Service之使用輕量級網路請求架構MKNetworkKIt