Repo created

iphone/Maps/Classes/CustomAlert/DownloadTransitMapsAlert/MWMDownloaderDialogHeader.mm

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+#import "MWMDownloaderDialogHeader.h"
+#import "MWMDownloadTransitMapAlert.h"
+
+static NSString * const kDownloaderDialogHeaderNibName = @"MWMDownloaderDialogHeader";
+
+@interface MWMDownloaderDialogHeader ()
+
+@property (weak, nonatomic) IBOutlet UILabel * title;
+@property (weak, nonatomic) IBOutlet UILabel * size;
+@property (weak, nonatomic) IBOutlet UIView * dividerView;
+@property (weak, nonatomic) MWMDownloadTransitMapAlert * ownerAlert;
+@property (weak, nonatomic) IBOutlet NSLayoutConstraint * sizeTrailing;
+@property (weak, nonatomic) IBOutlet NSLayoutConstraint * titleLeading;
+
+@end
+
+@implementation MWMDownloaderDialogHeader
+
++ (instancetype)headerForOwnerAlert:(MWMDownloadTransitMapAlert *)alert
+{
+  MWMDownloaderDialogHeader * header =
+      [NSBundle.mainBundle loadNibNamed:kDownloaderDialogHeaderNibName owner:nil options:nil]
+          .firstObject;
+  header.ownerAlert = alert;
+  return header;
+}
+
+- (IBAction)headerButtonTap:(UIButton *)sender
+{
+  BOOL const currentState = sender.selected;
+  sender.selected = !currentState;
+  self.dividerView.hidden = currentState;
+  [UIView animateWithDuration:kDefaultAnimationDuration animations:^
+  {
+    self.expandImage.transform = sender.selected ? CGAffineTransformMakeRotation(M_PI) : CGAffineTransformIdentity;
+  }];
+  [self.ownerAlert showDownloadDetail:sender];
+}
+
+- (void)layoutSizeLabel
+{
+  if (self.expandImage.hidden)
+    self.sizeTrailing.constant = self.titleLeading.constant;
+  [self layoutIfNeeded];
+}
+
+- (void)setTitle:(NSString *)title size:(NSString *)size
+{
+  self.title.text = title;
+  self.size.text = size;
+}
+
+@end