Jsqmessageviewcontroller画像のアップロードと画面上での表示が非常に遅いです。タッチが応答しません。

チャットページをスクロールするたびに、画像を取得するのに時間がかかり、何か応答できない場合があります。Jsqmessageviewcontroller画像のアップロードと画面上での表示が非常に遅いです。タッチが応答しません。

私がチャットページをスクロールするたびに、画像を取得するのに時間がかかり、何かが応答していないときにこれを助けてくれます。

- (id<JSQMessageData>)collectionView:(JSQMessagesCollectionView *)collectionView messageDataForItemAtIndexPath:(NSIndexPath *)indexPath { 



     JSQMessage *messageForRow; 


     NSString * chart = [[DataArray objectAtIndex:indexPath.row] objectForKey:@"Message"]; 
     NSString * imageurl = [[DataArray objectAtIndex:indexPath.row] objectForKey:@"media"]; 


     if (chart == nil) 
     { 
      NSURL *imageURL = [NSURL URLWithString:imageurl]; 


      NSData *imageData = [NSData dataWithContentsOfURL:imageURL]; 


      UIImage *image1 = [UIImage imageWithData:imageData]; 


      JSQPhotoMediaItem *item = [[JSQPhotoMediaItem alloc] initWithImage:image1]; 
      messageForRow = [[JSQMessage alloc] initWithSenderId:[[DataArray objectAtIndex:indexPath.row] objectForKey:@"UserId"] senderDisplayName:[[DataArray objectAtIndex:indexPath.row] objectForKey:@"Name"] date:[NSDate distantPast] media:item] ; 


     } 
     else 
     { 
     messageForRow = [[JSQMessage alloc] initWithSenderId:[[DataArray objectAtIndex:indexPath.row] objectForKey:@"UserId"] senderDisplayName:[[DataArray objectAtIndex:indexPath.row] objectForKey:@"Name"] date:[NSDate distantPast] text: [[DataArray objectAtIndex:indexPath.row] objectForKey:@"Message"]] ; 
     } 




     return messageForRow; 


    } 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{ 
    dispatch_async(dispatch_get_main_queue(), ^{ 




    img = [info valueForKey:UIImagePickerControllerOriginalImage]; 


    NSDate *currentDate = [[NSDate alloc] init]; 
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"]; 
    NSString *localDateString = [dateFormatter stringFromDate:currentDate]; 
    NSString* cleanedString = [[localDateString stringByReplacingOccurrencesOfString:@"." withString:@""]stringByReplacingOccurrencesOfString:@":" withString:@""]; 
    NSString *cleanedString2 = [cleanedString stringByAppendingFormat:@"%d",1]; 
    NSString *finalUniqueImageNAme = [cleanedString2 stringByAppendingString:@".jpg"]; 



    NSData *imageData = UIImageJPEGRepresentation(img, 90); 
    NSString *urlString = @"http://192.168.1.92/Abdul/IOS/Chat/upload/upload_file.php"; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setURL:[NSURL URLWithString:urlString]]; 
    [request setHTTPMethod:@"POST"]; 
    NSString *boundary = @"---------------------------14737809831466499882746641449"; 
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; 
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; 

    NSMutableData *body = [NSMutableData data]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"\r\n",finalUniqueImageNAme] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; 
    [body appendData:[NSData dataWithData:imageData]]; 
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [request setHTTPBody:body]; 

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; 
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; 
    NSLog(@"Successfully uploaded"); 




    NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self]; 
    if(conn) 
    { 
     NSLog(@"Connection Successful"); 
     [self dismissModalViewControllerAnimated:true]; 
    } 
    else 
    { 
     NSLog(@"Connection could not be made"); 
    } 

     }); 
    }); 
    [self dismissModalViewControllerAnimated:true]; 
} 


-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{ 

    webdata =[[NSMutableData alloc]init]; 

} 

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ 

    [webdata appendData:data]; 

} 
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 

{ 


    NSLog(@"%@",error); 

} 

-(void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    // NSString *responseString = [[NSString alloc]initWithData:webdata encoding:NSUTF8StringEncoding]; 

    dic=[NSJSONSerialization JSONObjectWithData:webdata options:0 error:nil]; 
    // NSLog(@"Success %@",dic); 

    res = [dic objectForKey:@"url"]; 

    NSLog(@"%@",res); 
    NSString * sta = [dic objectForKey:@"Success"]; 
    if (![sta isEqualToString:@"1"]) 
    { 
     return ; 

    } 


    NSDateFormatter *dateFormatter=[[NSDateFormatter alloc] init]; 
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 
    // or @"yyyy-MM-dd hh:mm:ss a" if you prefer the time with AM/PM 

    NSString * date = [dateFormatter stringFromDate:[NSDate date]]; 


    NSString *urlstr1=[@"https://popping-torch-4696.firebaseio.com/" stringByAppendingString:recvStr]; 

    Firebase *myRootRef = [[Firebase alloc] initWithUrl:urlstr1]; 

    NSString *dateStr=[NSString stringWithFormat:@"%@",date]; 

    [[myRootRef childByAutoId ] setValue:@{@"UserId" : str1,@"Name":str2,@"media":res , @"date":dateStr,}]; 

    [myRootRef observeSingleEventOfType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot) { 

     [self.collectionView reloadData]; 
    }]; 


}

出典

2016-04-19 VyTcdc

それをメインスレッドで画像をダウンロードしているようです。バックグラウンドスレッドで非同期にダウンロードし、メインスレッドのセルを更新するようにコードを変更します。 – Avt

どうすればいいか説明してください – VyTcdc