Fixed issue venmo#38 with custom keyboards

VENTokenField/VENTokenField.m

@@ -98,12 +98,12 @@ - (void)setUpInit
 
     // Accessing bare value to avoid kicking off a premature layout run.
     _toLabelText = NSLocalizedString(@"To:", nil);
-
+    
     self.originalHeight = CGRectGetHeight(self.frame);
-
+    
     // Add invisible text field to handle backspace when we don't have a real first responder.
     [self layoutInvisibleTextField];
-
+    
     [self layoutScrollView];
     [self reloadData];
 }
@@ -187,11 +187,11 @@ - (void)layoutCollapsedLabel
     [self.collapsedLabel removeFromSuperview];
     self.scrollView.hidden = YES;
     [self setHeight:self.originalHeight];
-
+    
     CGFloat currentX = 0;
     [self layoutToLabelInView:self origin:CGPointMake(self.horizontalInset, self.verticalInset) currentX:&currentX];
     [self layoutCollapsedLabelWithCurrentX:&currentX];
-
+    
     self.tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                         action:@selector(handleSingleTap:)];
     [self addGestureRecognizer:self.tapGestureRecognizer];
@@ -204,24 +204,24 @@ - (void)layoutTokensAndInputWithFrameAdjustment:(BOOL)shouldAdjustFrame
     [self.scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
     self.scrollView.hidden = NO;
     [self removeGestureRecognizer:self.tapGestureRecognizer];
-
+    
     self.tokens = [NSMutableArray array];
-
+    
     CGFloat currentX = 0;
     CGFloat currentY = 0;
-
+    
     [self layoutToLabelInView:self.scrollView origin:CGPointZero currentX:&currentX];
     [self layoutTokensWithCurrentX:&currentX currentY:&currentY];
     [self layoutInputTextFieldWithCurrentX:&currentX currentY:&currentY clearInput:shouldAdjustFrame];
-
+    
     if (shouldAdjustFrame) {
         [self adjustHeightForCurrentY:currentY];
     }
-
+    
     [self.scrollView setContentSize:CGSizeMake(self.scrollView.contentSize.width, currentY + [self heightForToken])];
-
+    
     [self updateInputTextField];
-
+    
     if (inputFieldShouldBecomeFirstResponder) {
         [self inputTextFieldBecomeFirstResponder];
     } else {
@@ -244,7 +244,7 @@ - (void)layoutScrollView
                                                     self.verticalInset,
                                                     self.horizontalInset);
     self.scrollView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
-
+    
     [self addSubview:self.scrollView];
 }
 
@@ -256,7 +256,7 @@ - (void)layoutInputTextFieldWithCurrentX:(CGFloat *)currentX currentY:(CGFloat *
         *currentY += [self heightForToken];
         *currentX = 0;
     }
-
+    
     VENBackspaceTextField *inputTextField = self.inputTextField;
     if (clearInput) {
         inputTextField.text = @"";
@@ -300,18 +300,18 @@ - (void)layoutTokensWithCurrentX:(CGFloat *)currentX currentY:(CGFloat *)current
     for (NSUInteger i = 0; i < [self numberOfTokens]; i++) {
         NSString *title = [self titleForTokenAtIndex:i];
         VENToken *token = [[VENToken alloc] init];
-
+        
         __weak VENToken *weakToken = token;
         __weak VENTokenField *weakSelf = self;
         token.didTapTokenBlock = ^{
             [weakSelf didTapToken:weakToken];
         };
-
+        
         [token setTitleText:[NSString stringWithFormat:@"%@,", title]];
         token.colorScheme = [self colorSchemeForTokenAtIndex:i];
 
         [self.tokens addObject:token];
-
+        
         if (*currentX + token.width <= self.scrollView.contentSize.width) { // token fits in current line
             token.frame = CGRectMake(*currentX, *currentY, token.width, token.height);
         } else {
@@ -341,7 +341,7 @@ - (void)layoutInvisibleTextField
     self.invisibleTextField = [[VENBackspaceTextField alloc] initWithFrame:CGRectZero];
     [self.invisibleTextField setAutocorrectionType:self.autocorrectionType];
     [self.invisibleTextField setAutocapitalizationType:self.autocapitalizationType];
-    self.invisibleTextField.backspaceDelegate = self;
+    self.invisibleTextField.delegate = self;
     [self addSubview:self.invisibleTextField];
 }
 
@@ -350,7 +350,7 @@ - (void)inputTextFieldBecomeFirstResponder
     if (self.inputTextField.isFirstResponder) {
         return;
     }
-
+    
     [self.inputTextField becomeFirstResponder];
     if ([self.delegate respondsToSelector:@selector(tokenFieldDidBeginEditing:)]) {
         [self.delegate tokenFieldDidBeginEditing:self];
@@ -409,7 +409,6 @@ - (VENBackspaceTextField *)inputTextField
         _inputTextField.autocapitalizationType = self.autocapitalizationType;
         _inputTextField.tintColor = self.colorScheme;
         _inputTextField.delegate = self;
-        _inputTextField.backspaceDelegate = self;
         _inputTextField.placeholder = self.placeholderText;
         _inputTextField.accessibilityLabel = self.inputTextFieldAccessibilityLabel ?: NSLocalizedString(@"To", nil);
         _inputTextField.inputAccessoryView = self.inputTextFieldAccessoryView;
@@ -566,6 +565,12 @@ - (void)textFieldDidBeginEditing:(UITextField *)textField
 
 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
 {
+    if ([textField isKindOfClass:[VENBackspaceTextField class]] &&
+        [self isBackspacePressInTextField:textField range:range replacementString:string]) {
+        [self textFieldDidEnterBackspace:(VENBackspaceTextField *)textField];
+        return NO;
+    }
+
     [self unhighlightAllTokens];
     NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];
     for (NSString *delimiter in self.delimiters) {
@@ -583,6 +588,13 @@ - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRang
     return YES;
 }
 
+- (BOOL)isBackspacePressInTextField:(UITextField *)textField range:(NSRange)range replacementString:(NSString *)string {
+    return textField.text.length == 0 &&
+    range.location == 0 &&
+    range.length == 0 &&
+    string.length == 0;
+}
+
 
 #pragma mark - VENBackspaceTextFieldDelegate