NSURLConnection – 在使用另一个类作为委托时以及存在身份validation质询时抓取响应数据
我正在使用我的内部API从我的服务器检索数据。 我正在使用基本身份validation来实现这一点。 由于API的性质，我没有在我的服务器代码上实现任何会话或其他任何内容，所以我发送了所有请求的用户名和密码。
正因为如此，我不想为我使用的每个viewcontroller实现NSURLConnection委托。 所以，我创build了一个辅助类，它扩展NSObject，并将其设置为NSURLConnectionDelegate。
@interface HandlerClass : NSObject <NSURLConnectionDelegate> 我实现了我所需要的每一种方法，而且我把它称为：
NSURL *URL = [NSURL URLWithString:@"https://url/ifuser/"]; NSLog(@"Connection "); NSURLRequest *request = [NSURLRequest requestWithURL:URL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30.0]; NSHTTPURLResponse *response; HandlerClass *cc = [[HandlerClass alloc] init]; cc.username = self.username.text; cc.password = self.password.text; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:cc];
但无论我尝试，我不能达到该代表的数据响应数据。
我从字面上试图阅读互联网上的每一篇文章，包括stackoverflow和其他网站。 每个解决scheme都不需要authentication。
但我只需要authentication的解决scheme。
谢谢。
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编辑：我知道我做了几个冗余的错误。 但我可以弄清楚什么是错的。 我只需要使用NSRunLoop来实现我的目标。 谢谢大家。
这就是我所做的。 我把文章： 基本authentication与Cocoa Touch中的NSURLRequest一起使用，它使用同步请求。 这里asynchronous用于请求。
ConnectionHandler.h
#import <Foundation/Foundation.h> @interface ConnectionHandler : NSObject<NSURLConnectionDataDelegate> @property(nonatomic, retain) NSString *username; @property(nonatomic, retain) NSString *password; - (void)start; @end
在ConnectionHandler.m中
#import "ConnectionHandler.h" #import "Base64.h" @interface ConnectionHandler() { NSMutableData *receivedData; NSURLConnection *connection; } @end @implementation ConnectionHandler - (id)init { self = [super init]; if (self) { receivedData = [[NSMutableData alloc] init]; } return self; } - (void)start { NSURL *url = [NSURL URLWithString:@"http://192.168.1.103/~will/"]; NSError *myError = nil; // create a plaintext string in the format username:password NSMutableString *loginString = (NSMutableString*)[@"" stringByAppendingFormat:@"%@:%@", self.username, self.password]; // employ the Base64 encoding above to encode the authentication tokens NSString *encodedLoginData = [Base64 encode:[loginString dataUsingEncoding:NSUTF8StringEncoding]]; // create the contents of the header NSString *authHeader = [@"Basic " stringByAppendingFormat:@"%@", encodedLoginData]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: url cachePolicy: NSURLRequestReloadIgnoringCacheData timeoutInterval: 3]; // add the header to the request. Here's the $$$!!! [request addValue:authHeader forHTTPHeaderField:@"Authorization"]; // perform the reqeust NSURLResponse *response; connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection start]; } //a simple request may receive several response, when a new response receive, the previous received should be reset. - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [receivedData setLength:0]; } //a connection may receive data several time, append the received data to existing data - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [receivedData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { connection = nil; receivedData = nil; NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSErrorFailingURLStringKey]); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"succeeded %d byte received",[receivedData length]); receivedData = nil; connection = nil; } @end
Base64.m
#import "Base64.h" static char *alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; @implementation Base64 +(NSString *)encode:(NSData *)plainText { int encodedLength = (4 * (([plainText length] / 3) + (1 - (3 - ([plainText length] % 3)) / 3))) + 1; unsigned char *outputBuffer = malloc(encodedLength); unsigned char *inputBuffer = (unsigned char *)[plainText bytes]; NSInteger i; NSInteger j = 0; int remain; for(i = 0; i < [plainText length]; i += 3) { remain = [plainText length] - i; outputBuffer[j++] = alphabet[(inputBuffer[i] & 0xFC) >> 2]; outputBuffer[j++] = alphabet[((inputBuffer[i] & 0x03) << 4) | ((remain > 1) ? ((inputBuffer[i + 1] & 0xF0) >> 4): 0)]; if(remain > 1) outputBuffer[j++] = alphabet[((inputBuffer[i + 1] & 0x0F) << 2) | ((remain > 2) ? ((inputBuffer[i + 2] & 0xC0) >> 6) : 0)]; else outputBuffer[j++] = '='; if(remain > 2) outputBuffer[j++] = alphabet[inputBuffer[i + 2] & 0x3F]; else outputBuffer[j++] = '='; } outputBuffer[j] = 0; NSString *result = [NSString stringWithCString:outputBuffer length:strlen(outputBuffer)]; free(outputBuffer); return result; } @end
在视图控制器中
- (void)viewDidLoad { [super viewDidLoad]; ConnectionHandler *connectionHandler = [[ConnectionHandler alloc] init]; connectionHandler.username = @"username"; connectionHandler.password = @"password"; [connectionHandler start]; }
我经历了类似的要求，请查看发布到此问题的解决scheme
该解决scheme使用完成块，它很好地从另一个（Handler）类中实现的委托方法中检索信息。