added keyboard support

Author: evilpenguin

ARMRef/ARMRef/Source/Main/AMainViewController.m

@@ -18,6 +18,7 @@ @interface AMainViewController () <UISearchBarDelegate, ACollectionViewDelegates
 @property (nonatomic, strong) UILabel *noDataLabel;
 @property (nonatomic, strong) ACollectionView *collectionView;
 @property (nonatomic, strong) ACollectionViewDataHandle *collectionViewDataHandle;
+@property (nonatomic, assign) CGRect keyboardFrame;
 
 @end
 
@@ -34,6 +35,11 @@ - (instancetype) initWithLoader:(AInstructionLoader *)loader {
                                                selector:@selector(_loaderNotification:)
                                                    name:AInstructionLoaderFinishedNotificaton
                                                  object:nil];
+        
+        [NSNotificationCenter.defaultCenter addObserver:self
+                                               selector:@selector(_keyboardWillChangeFrameNotification:)
+                                                   name:UIKeyboardWillChangeFrameNotification
+                                                 object:nil];
     }
 
     return self;
@@ -47,10 +53,10 @@ - (void) viewDidLoad {
 
     // Serach
     [self.view addSubview:self.searchBar];
-
+    
     // No data
     [self.view addSubview:self.noDataLabel];
-
+    
     // Collection View
     [self.view addSubview:self.collectionView];
 }
@@ -69,9 +75,13 @@ - (void) viewWillLayoutSubviews {
 
     // Collection view
     CGFloat padding = (!leftRightInset ? 8.0f : 0.0f);
-    CGFloat colletionViewHeight = self.view.bounds.size.height - (CGRectGetMaxY(self.searchBar.frame) + 5.0f);
-    CGFloat collectionViewWidth = self.view.bounds.size.width - (leftRightInset + (padding * 2.0f));
-    self.collectionView.frame = CGRectMake(self.view.safeAreaInsets.left + padding, CGRectGetMaxY(self.searchBar.frame) + 5.0f, collectionViewWidth, colletionViewHeight);
+    CGRect collectionViewFrame = CGRectMake(self.view.safeAreaInsets.left + padding,
+                                            CGRectGetMaxY(self.searchBar.frame) + 5.0f,
+                                            self.view.bounds.size.width - (leftRightInset + (padding * 2.0f)),
+                                            self.view.bounds.size.height - (CGRectGetMaxY(self.searchBar.frame) + 5.0f));
+    if (self.searchBar.isFirstResponder) collectionViewFrame.size.height -= self.keyboardFrame.size.height;
+
+    self.collectionView.frame = collectionViewFrame;
     [self.collectionView.collectionViewLayout invalidateLayout];
 }
 
@@ -94,6 +104,12 @@ - (void) _showNoDataStyle:(BOOL)show {
     self.collectionView.alpha = (show ? 0.0f : 1.0f);
 }
 
+- (void) _keyboardWillChangeFrameNotification:(NSNotification *)notification {
+    self.keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
+    
+    [self.view setNeedsLayout];
+}
+
 #pragma mark - Lazy
 
 - (UISearchBar *) searchBar {