Я выполняю загрузку через класс NSURLConnection и обновляю отображение индикатора выполнения в соответствии с полученными байтами в NSURLConnection delegate соединении didReceiveData.
Все работает нормально, когда я нахожусь на странице, где происходит загрузка, но когда я перехожу к другому контроллеру представления и возвращаюсь на свою страницу загрузки, функции соединения delegate вызываются во время перехода страницы, но возвращение не обновляет progress бар.
Я использую следующий код:
- (IBAction)download:(id)sender {
_currentURL = [NSString stringWithFormat:@"url_to_download"];
NSURL *url =[NSURL URLWithString:_currentURL];
NSURLRequest *theRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];
_receivedData = [[NSMutableData alloc]initWithLength:0];
connection2 = [[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];
self.setting.enabled = NO;
float progressive = (float)[_receivedData length] / (float)expectedBytes;
[self.progress setProgress:progressive];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
AppDelegate *app = (AppDelegate*) [[UIApplication sharedApplication]delegate];
NSLog(@"into didfailwitherror");
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
NSLog(@"connection failed");
}
-(NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse
{
return nil;
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
self.setting.enabled = YES;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSLog(@"DOCUMENT DIRECTORY :%@",documentsDirectory);
_imagePath = [documentsDirectory stringByAppendingPathComponent:_fullPath];
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])
{
NSLog(@"write successfull");
app.dl_status = 0;
[HUD hide:YES];
[HUD removeFromSuperview];
HUD = nil;
[self completedDownloadHUD];
[self.download setBackgroundImage:[UIImage imageNamed:@"download.png"] forState:UIControlStateNormal];
}
else{
app.dl_status = 0;
NSLog(@"write failed");
[HUD hide:YES];
[self errorDownloadHUD];
}
NSString *imagePathExtension;
imagePathExtension = [_imagePath pathExtension];
if([imagePathExtension isEqual:@"jpg"])
{
NSLog(@"imagepathextension is jpg");
UIImage *img =[UIImage imageWithContentsOfFile:_imagePath];
UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}
else if([imagePathExtension isEqual:@"mov"])
{
NSLog(@"imagepathextension is mp4");
UISaveVideoAtPathToSavedPhotosAlbum(_imagePath, nil, nil, nil);
}
}
Скажите, пожалуйста, как я могу сохранить значение индикатора выполнения, возвращаясь на страницу и обновляя его.
