测试NSURL，http请求的代理函数

#import <UIKit/UIKit.h>
#import "ShowHelloViewController.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>
{
    NSString *m_strTest;
}

@property (strong, nonatomic) UIWindow *window;

@property (copy, nonatomic) NSString *m_strTest;

@end

　　

#import "AppDelegate.h"
@class NSHTTPURLResponseInternal;
@implementation AppDelegate
@synthesize m_strTest;

- (void)dealloc
{
    [_window release];
    [m_strTest release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    NSURLRequest *request=[NSURLRequest  requestWithURL:[NSURL URLWithString:@"http://xxxxxxx/20130731032642_5.jpg"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    NSURLConnection *connection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
    if (connection) {
        
    }
    
    return YES;
}

#pragma mark callback

-(void)connection :(NSURLConnection *)connection didReceiveResponse : (NSURLResponse *)responed{
    NSHTTPURLResponse *htppResponse = (NSHTTPURLResponse*)responed;
    NSLog(@"responed:%d", htppResponse.statusCode);
//    [responseData setLength : 0];
}

-(void)connection : (NSURLConnection *) connection didReceiveData:(NSData *)data{
//    [responseData appendData : data];
    NSLog(@"data:%d", [data length]);
    
    NSString *str = [[NSString alloc]initWithData:data encoding:NSASCIIStringEncoding];
    
    if ([str rangeOfString:@"404 Not Found"].length != 0)
    {
        NSLog(@"good");
    }
    NSLog(@"str:%@", str);
//    NSLog(@"str:%s", [data bytes]);
}

-(void)connection : (NSConnection *) connection didFailWithError:(NSError *)error{
    NSLog(@"hello");
}

-(void) connectionDidFinishLoading : (NSURLConnection *)  connection{
    
    NSLog(@"connection:%@", connection);
    
}

@end

　　

测试NSURL，http请求的代理函数