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Animated change of contentOffset for case with changing keyboard height #178

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Animated change of contentOffset for case with changing keyboard height #178

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d513f1f
Animated change of contentOffset for case with changing keyboard height
kohtenko Aug 19, 2015
206c302
Bounce fix
kohtenko Aug 20, 2015
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17 changes: 11 additions & 6 deletions TPKeyboardAvoiding/UIScrollView+TPKeyboardAvoidingAdditions.m
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ - (TPKeyboardAvoidingState*)keyboardAvoidingState {

- (void)TPKeyboardAvoiding_keyboardWillShow:(NSNotification*)notification {
CGRect keyboardRect = [self convertRect:[[[notification userInfo] objectForKey:_UIKeyboardFrameEndUserInfoKey] CGRectValue] fromView:nil];
if (CGRectIsEmpty(keyboardRect)) {
if (CGRectIsEmpty(keyboardRect) || !CGRectIntersectsRect(keyboardRect, self.bounds)) {
return;
}

Expand Down Expand Up @@ -79,22 +79,27 @@ - (void)TPKeyboardAvoiding_keyboardWillShow:(NSNotification*)notification {
self.contentSize = [self TPKeyboardAvoiding_calculatedContentSizeFromSubviewFrames];
}
}

int curve = [[[notification userInfo] objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue];
float duration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
if (curve == 0)
curve = 7;
if (duration == 0)
duration = 0.25;
// Shrink view's inset by the keyboard's height, and scroll to show the text field/view being edited
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationCurve:[[[notification userInfo] objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]];
[UIView setAnimationDuration:[[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue]];
[UIView setAnimationCurve:curve];
[UIView setAnimationDuration:duration];

self.contentInset = [self TPKeyboardAvoiding_contentInsetForKeyboard];

self.scrollIndicatorInsets = self.contentInset;
[self layoutIfNeeded];
CGFloat viewableHeight = self.bounds.size.height - self.contentInset.top - self.contentInset.bottom;
[self setContentOffset:CGPointMake(self.contentOffset.x,
[self TPKeyboardAvoiding_idealOffsetForView:firstResponder
withViewingAreaHeight:viewableHeight])
animated:NO];

self.scrollIndicatorInsets = self.contentInset;
[self layoutIfNeeded];

[UIView commitAnimations];
}
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2 changes: 2 additions & 0 deletions TPKeyboardAvoidingSample/TPKAScrollViewController.m
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Expand Up @@ -27,6 +27,8 @@ - (void)viewDidLoad {
textField.translatesAutoresizingMaskIntoConstraints = NO;
textField.placeholder = [NSString stringWithFormat:@"Field %d", i];
textField.borderStyle = UITextBorderStyleRoundedRect;
textField.secureTextEntry = i == 39;

[self.scrollView addSubview:textField];

[self.scrollView addConstraint:[NSLayoutConstraint constraintWithItem:textField attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:30]];
Expand Down