iOS: Date picker for text field

Example with two text fields:

let fromDate = UITextField()
let toDate = UITextField()
let datePicker = UIDatePicker()
let dateFormatter = DateFormatter()

...

dateFormatter.dateFormat = "MM-dd-yyyy"
datePicker.datePickerMode = UIDatePicker.Mode.date
datePicker.addTarget(self, action: #selector(<YouViewController>.datePickerValueChanged(sender:)), for: UIControl.Event.valueChanged)

...

let date = Date()
fromDate.text = dateFormatter.string(from: date)
fromDate.textAlignment = NSTextAlignment.left
fromDate.inputView = datePicker
fromDate.delegate = self

let toolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: view.frame.size.width, height: 44))
        let doneBtn = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(dateSelected))
        let cancelBtn = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(dismissPicker))
        toolbar.setItems([cancelBtn, doneBtn], animated: false)
        fromDate.inputAccessoryView = toolbar

toDate.text = dateFormatter.string(from: date)
toDate.textAlignment = NSTextAlignment.left
toDate.inputView = datePicker
toDate.delegate = self

...

@objc func datePickerValueChanged(sender: AnyObject) {
        if (fromDate.isFirstResponder) {
            fromDate.text = dateFormatter.string(from: datePicker.date)
         
        } else {
            toDate.text = dateFormatter.string(from: datePicker.date)
        }
    }

// UITextFieldDelegate
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
return false
}

iOS: TableView row height given by image in ImageView

Objective C

[[Server sharedInstance] getItems:^(id response, NSError *error) {

        

        [self hideActivityIndicator];

        

        if (error) {

            [self showErrorDialogWithMessage:error.localizedDescription];

            

        } else {

            self.items = ((NSArray<Item*>*)response).data;

            self.itemsHeights = [[NSMutableArray alloc] initWithCapacity:self.items.count];

            

            for (int i = 0; i < self.items.count; i++) {

                [self.itemsHeights addObject:[NSNumber numberWithInt:160]];

            }

            

            if (self.items.count != 0) {

                [self noResultsViewHidden:YES];

            }

            

            [self.tableView reloadData];

        }

    }];

        

#pragma mark - UITableViewDataSource

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return self.items.count;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    Product* item = item = self.items[indexPath.row];

      

    MyCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];

    // Customize cell

        

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:item.picture]];

    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];

    

    __block UIImageView* imageViewRef = cell.itemImageView;

    __block NSIndexPath *blockIndexPath = indexPath;

    

    [cell.itemImageView cancelImageDownloadTask];

    

    AFImageDownloader* downloader = [UIImageView sharedImageDownloader];

    UIImage *cachedImage = [downloader.imageCache imageforRequest:request withAdditionalIdentifier:nil];

        

    if (cachedImage) {

        cell.productImageView.image = cachedImage;

        

        long height = cell.frame.size.width * cachedImage.size.height / cachedImage.size.width;

        [self.itemsHeights setObject:[NSNumber numberWithLong:height] atIndexedSubscript:blockIndexPath.row];

    

    } else {

        [cell.productImageView setImageWithURLRequest:request placeholderImage:nil success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull image) {

            

            long height = cell.frame.size.width * image.size.height / image.size.width;

            [self.itemsHeights setObject:[NSNumber numberWithLong:height] atIndexedSubscript:blockIndexPath.row];

            

            float scale = image.size.width / self.tableView.frame.size.width;

            

            UIImage* scaledImage = [UIImage imageWithCGImage:image.CGImage scale:image.scale * scale orientation:image.imageOrientation];

            

            dispatch_async(dispatch_get_main_queue(), ^{

                

                imageViewRef.image = scaledImage;

                

                if ([self.tableView.indexPathsForVisibleRows containsObject:blockIndexPath]) {

                    [self.tableView beginUpdates];

                    [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];

                    [self.tableView endUpdates];

                }

            });

            

        } failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {

            imageViewRef.image = nil;

        }];

    }

    

    

    return cell;

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;

{

    return self.itemsHeights[indexPath.row].longValue;

}