Simplifies iOS 9 only API usage and fixes an issue in the sample project not compiling in iOS 8

Author: Ignacio Romero Zurbuchen

Examples/Messenger-Shared/MessageViewController.m

@@ -191,25 +191,24 @@ - (void)simulateUserTyping:(id)sender
     }
 }
 
-- (void)cellDidLongPress:(UIGestureRecognizer *)gesture
+- (void)didLongPressCell:(UIGestureRecognizer *)gesture
 {
-    if ([UIAlertController class]) {
-        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
-        alertController.modalPresentationStyle = UIModalPresentationPopover;
-        alertController.popoverPresentationController.sourceView = gesture.view.superview;
-        alertController.popoverPresentationController.sourceRect = gesture.view.frame;
-        
-        [alertController addAction:[UIAlertAction actionWithTitle:@"Edit Message" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
-            [self editCellMessage:gesture];
-        }]];
-        
-        [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:NULL]];
-        
-        [self.navigationController presentViewController:alertController animated:YES completion:nil];
-    }
-    else {
+#ifdef __IPHONE_9_0
+    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
+    alertController.modalPresentationStyle = UIModalPresentationPopover;
+    alertController.popoverPresentationController.sourceView = gesture.view.superview;
+    alertController.popoverPresentationController.sourceRect = gesture.view.frame;
+    
+    [alertController addAction:[UIAlertAction actionWithTitle:@"Edit Message" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
         [self editCellMessage:gesture];
-    }
+    }]];
+    
+    [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:NULL]];
+    
+    [self.navigationController presentViewController:alertController animated:YES completion:nil];
+#else
+    [self editCellMessage:gesture];
+#endif
 }
 
 - (void)editCellMessage:(UIGestureRecognizer *)gesture
@@ -457,7 +456,7 @@ - (MessageTableViewCell *)messageCellForRowAtIndexPath:(NSIndexPath *)indexPath
     MessageTableViewCell *cell = (MessageTableViewCell *)[self.tableView dequeueReusableCellWithIdentifier:MessengerCellIdentifier];
 
     if (!cell.textLabel.text) {
-        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(cellDidLongPress:)];
+        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(didLongPressCell:)];
         [cell addGestureRecognizer:longPress];
     }
 

Source/Classes/SLKTextViewController.m

@@ -2001,14 +2001,12 @@ - (UIKeyCommand *)slk_returnKeyCommand
     UIKeyCommand *command = [UIKeyCommand keyCommandWithInput:@"\r" modifierFlags:0 action:@selector(didPressReturnKey:)];
 
 #ifdef __IPHONE_9_0
-    // Only available since iOS9
-    if ([UIKeyCommand respondsToSelector:@selector(keyCommandWithInput:modifierFlags:action:discoverabilityTitle:)] ) {
-        if (self.textInputbar.isEditing) {
-            command.discoverabilityTitle = [self.textInputbar.editorRightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Commit Editing", nil);
-        }
-        else {
-            command.discoverabilityTitle = [self.rightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Send", nil);
-        }
+    // Only available since iOS 9
+    if (self.textInputbar.isEditing) {
+        command.discoverabilityTitle = [self.textInputbar.editorRightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Commit Editing", nil);
+    }
+    else if (self.textView.text.length > 0) {
+        command.discoverabilityTitle = [self.rightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Send", nil);
     }
 #endif
 
@@ -2020,17 +2018,15 @@ - (UIKeyCommand *)slk_escKeyCommand
     UIKeyCommand *command = [UIKeyCommand keyCommandWithInput:UIKeyInputEscape modifierFlags:0 action:@selector(didPressEscapeKey:)];
 
 #ifdef __IPHONE_9_0
-    // Only available since iOS9
-    if ([UIKeyCommand respondsToSelector:@selector(keyCommandWithInput:modifierFlags:action:discoverabilityTitle:)] ) {
-        if (self.isAutoCompleting) {
-            command.discoverabilityTitle = NSLocalizedString(@"Exit Auto-Completion", nil);
-        }
-        else if (self.textInputbar.isEditing) {
-            command.discoverabilityTitle = [self.textInputbar.editorRightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Exit Editing", nil);
-        }
-        else if (!self.isExternalKeyboardDetected && self.keyboardHC.constant != 0) {
-            command.discoverabilityTitle = NSLocalizedString(@"Hide Keyboard", nil);
-        }
+    // Only available since iOS 9
+    if (self.isAutoCompleting) {
+        command.discoverabilityTitle = NSLocalizedString(@"Exit Auto-Completion", nil);
+    }
+    else if (self.textInputbar.isEditing) {
+        command.discoverabilityTitle = [self.textInputbar.editorRightButton titleForState:UIControlStateNormal] ? : NSLocalizedString(@"Exit Editing", nil);
+    }
+    else if (!self.isExternalKeyboardDetected && self.keyboardHC.constant != 0) {
+        command.discoverabilityTitle = NSLocalizedString(@"Hide Keyboard", nil);
     }
 #endif
 
@@ -2042,14 +2038,12 @@ - (UIKeyCommand *)slk_arrowKeyCommand:(NSString *)inputUpArrow
     UIKeyCommand *command = [UIKeyCommand keyCommandWithInput:inputUpArrow modifierFlags:0 action:@selector(didPressArrowKey:)];
 
 #ifdef __IPHONE_9_0
-    // Only available since iOS9
-    if ([UIKeyCommand respondsToSelector:@selector(keyCommandWithInput:modifierFlags:action:discoverabilityTitle:)] && self.textView.numberOfLines > 1) {
-        if ([inputUpArrow isEqualToString:UIKeyInputUpArrow]) {
-            command.discoverabilityTitle = NSLocalizedString(@"Move Up", nil);
-        }
-        if ([inputUpArrow isEqualToString:UIKeyInputDownArrow]) {
-            command.discoverabilityTitle = NSLocalizedString(@"Move Down", nil);
-        }
+    // Only available since iOS 9
+    if ([inputUpArrow isEqualToString:UIKeyInputUpArrow]) {
+        command.discoverabilityTitle = NSLocalizedString(@"Move Up", nil);
+    }
+    if ([inputUpArrow isEqualToString:UIKeyInputDownArrow]) {
+        command.discoverabilityTitle = NSLocalizedString(@"Move Down", nil);
     }
 #endif