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我想用NSURLconnection一個接一個地下載多個文件,而且可以做的最大下載量是5.這個過程就像初次下載,當第一次下載完成後纔開始第二次下載當第二個是完整的啓動第三one.Likewise的第四下載和第五download.i我能夠下載一個文件.The代碼相同的是:使用nsurlconnection一個接一個下載
- (IBAction)download1:(id)sender {
_fileName = @"dog-wallpaper-dogs.jpg";
_currentURL = [NSString stringWithFormat:@"http://noruffdaysdotcom1.files.wordpress.com/2012/04/%@",_fileName];
NSLog(@"currenturl%@",_currentURL);
NSLog(@"the filename is %@",_fileName);
NSURL *url =[NSURL URLWithString:_currentURL];
NSURLRequest *theRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];
_receivedData = [[NSMutableData alloc]initWithLength:0];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:theRequest delegate:self startImmediately:YES];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
NSLog(@"THE STATUS CODE IS %d",[httpResponse statusCode]);
statuscode = [httpResponse statusCode];
NSLog(@"into didReceiveResponse");
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[_receivedData setLength:0];
expectedBytes = [response expectedContentLength];
NSLog(@"EXPECTED BYTES:%ld",expectedBytes);
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// NSLog(@"into did receivedata");
[_receivedData appendData:data];
// float progressive = (float)[_receivedData length]/(float)expectedBytes;
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
flag= 0;
NSLog(@"into didfailwitherror");
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
NSLog(@"connection failed");
}
-(NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse
{
return nil;
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{ flag = 0;
NSLog(@"into didfinishloading");
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSLog(@"DOCUMENT DIRECTORY :%@",documentsDirectory);
// [NSFileManager isWritbleAtPath:documentsDirectory];
// [NSFileManager isWritableAtPath:documentsDirectory];
_imagePath = [documentsDirectory stringByAppendingPathComponent:_fileName];
NSLog(@"iamge path:%@",_imagePath);
NSLog(@"succeeded");
[UIApplication sharedApplication].networkActivityIndicatorVisible= NO;
NSLog(@"Succeeded! Received %d bytes of data",[_receivedData length]);
// flag= [_receivedData writeToFile:imagePath atomically:NO];
if([_receivedData writeToFile:_imagePath atomically:YES])
{
flag= 1;
NSLog(@"write successfull");
}
else{
flag =0;
NSLog(@"write failed");
}
UIImage *img =[UIImage imageWithContentsOfFile:_imagePath];
self.imageview.image = img;
isloaded = YES;
}
請幫助我,我怎麼就下一步下載早些時候完成。