ダウンロード時にasyncをダウンロードしているときにVCを起動してもUIは変更されません。つまり、ボタンのタイトルです。

Question

afyncを使用してダウンロードを開始すると、afnetworkingの助けを借りてダウンロードしても、唯一その道を進んでいるが、私は再び同じダウンロード画面ブレークポイントに行くときも、画面上に来るが、それはここでは、ボタンのいずれかのタイトルまたはそのようなUIアクション

を変更doesntのこと

- (void) downloadByURL:(NSString *)URL 
{ 

    [self.progress setHidden:NO]; 
    [self.btnsubscribe setUserInteractionEnabled:NO]; 

    NSURL *url = [NSURL URLWithString:URL]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:url]; 

    AFHTTPSessionManager *session = [AFHTTPSessionManager manager]; 
    NSURLSessionDownloadTask *tasks= 
    [session downloadTaskWithRequest:request progress:nil destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) { 
     // 
     NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
     NSString *path = [documentsDirectory stringByAppendingPathComponent:[[[[NSString stringWithFormat:@"%@",self.ILModel.IssueID] stringByAppendingString:self.ILModel.Month] stringByAppendingString:self.ILModel.Year] stringByAppendingString:@".pdf"]]; 
     return [NSURL URLWithString: path]; 
    } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nonnull filePath, NSError * _Nonnull error) { 


     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) { 
      [[NSData dataWithContentsOfURL:url] writeToFile:[filePath absoluteString] atomically:YES]; 
      [self.progress setHidden:YES]; 
      [KSToastView ks_showToast:@"Download Complete" duration:2.0f]; 

      [self.btnsubscribe setBackgroundColor:[UIColor colorWithHexString:@"5BE4CA"]]; 
      [self.btnsubscribe setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
      [self.btnsubscribe setTitle:@"View" forState:UIControlStateNormal]; 
      [self.btnsubscribe setUserInteractionEnabled:YES]; 
     }); 
    }]; 

    [session setDownloadTaskDidWriteDataBlock:^(NSURLSession *session, NSURLSessionDownloadTask *downloadTask, int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite) { 

     int prog= (int)(totalBytesWritten * 100/totalBytesExpectedToWrite); 

     [self.progress setHidden:NO]; 
     [self.btnsubscribe setTitle:@"Downloading" forState:UIControlStateNormal]; 
     [KSToastView ks_showToast:[NSString stringWithFormat:@"Downloaded %lld %%",totalBytesWritten * 100/totalBytesExpectedToWrite] duration:1.0f]; 
     [self performSelectorOnMainThread:@selector(setLoaderProgress:) withObject:[NSNumber numberWithFloat:(float)prog/100] waitUntilDone:NO]; 

     NSLog(@"Progress… %lld",totalBytesWritten * 100/totalBytesExpectedToWrite); 
    }]; 

    [tasks resume]; 
} 

をダウンロードするための私のコードです

ありがとうございます...

Answer 1

バックグラウンドスレッドでUIタスクを実行しています。はい

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) { 

      [[NSData dataWithContentsOfURL:url] writeToFile:[filePath absoluteString] atomically:YES]; 
      dispatch_async(dispatch_get_main_queue(), ^{ 
        [self.progress setHidden:YES]; 
        [KSToastView ks_showToast:@"Download Complete" duration:2.0f]; 
        [self.btnsubscribe setBackgroundColor:[UIColor colorWithHexString:@"5BE4CA"]]; 
        [self.btnsubscribe setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
        [self.btnsubscribe setTitle:@"View" forState:UIControlStateNormal]; 
        [self.btnsubscribe setUserInteractionEnabled:YES]; 
      }); 
});