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Now with physics! #22

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150 changes: 97 additions & 53 deletions CSNotificationView/CSNotificationView.m
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,10 @@

static NSInteger const kCSNotificationViewEmptySymbolViewTag = 666;

@interface CSNotificationView ()
@interface CSNotificationView (){
UIView *_messageView;
UIDynamicAnimator *_animator;
}

#pragma mark - blur effect
@property (nonatomic, strong) UIToolbar *toolbar;
Expand Down Expand Up @@ -93,22 +96,26 @@ - (instancetype)initWithParentViewController:(UIViewController*)viewController
self = [super initWithFrame:CGRectZero];
if (self) {

_messageView = [[UIView alloc] initWithFrame:CGRectZero];
[self addSubview:_messageView];

//Blur | thanks to https://github.com/JagCesar/iOS-blur for providing this under the WTFPL-license!
{
[self setToolbar:[[UIToolbar alloc] initWithFrame:[self bounds]]];
[self setToolbar:[[UIToolbar alloc] initWithFrame:[_messageView bounds]]];
[self setBlurLayer:[[self toolbar] layer]];

UIView *blurView = [UIView new];
[blurView setUserInteractionEnabled:NO];
[blurView.layer addSublayer:[self blurLayer]];
[blurView setTranslatesAutoresizingMaskIntoConstraints:NO];
[blurView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[self insertSubview:blurView atIndex:0];
[_messageView insertSubview:blurView atIndex:0];

[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[blurView]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(blurView)]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(-1)-[blurView]-(-1)-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(blurView)]];
[_messageView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[blurView]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(blurView)]];
[_messageView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(-1)-[blurView]-(-1)-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(blurView)]];

[self setBackgroundColor:[UIColor clearColor]];
[_messageView setBackgroundColor:[UIColor clearColor]];
}

//Parent view
Expand Down Expand Up @@ -141,7 +148,7 @@ - (instancetype)initWithParentViewController:(UIViewController*)viewController
_textLabel.numberOfLines = 2;
_textLabel.textColor = [UIColor whiteColor];
_textLabel.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_textLabel];
[_messageView addSubview:_textLabel];
}
//symbolView
{
Expand All @@ -150,7 +157,7 @@ - (instancetype)initWithParentViewController:(UIViewController*)viewController
}

self.autoresizingMask = UIViewAutoresizingNone;

_messageView.autoresizingMask = UIViewAutoresizingNone;
}
return self;
}
Expand All @@ -159,7 +166,7 @@ - (instancetype)initWithParentViewController:(UIViewController*)viewController

- (void)updateConstraints
{
[self removeConstraints:self.constraints];
[_messageView removeConstraints:_messageView.constraints];

CGFloat symbolViewWidth = self.symbolView.tag != kCSNotificationViewEmptySymbolViewTag ?
kCSNotificationViewSymbolViewSidelength : 0.0f;
Expand All @@ -169,29 +176,29 @@ - (void)updateConstraints
@{@"symbolViewWidth": [NSNumber numberWithFloat:symbolViewWidth],
@"symbolViewHeight":[NSNumber numberWithFloat:symbolViewHeight]};

[self addConstraints:[NSLayoutConstraint
[_messageView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"H:|-(4)-[_symbolView(symbolViewWidth)]-(5)-[_textLabel]-(10)-|"
options:0
metrics:metrics
views:NSDictionaryOfVariableBindings(_textLabel, _symbolView)]];

[self addConstraints:[NSLayoutConstraint
[_messageView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"V:[_symbolView(symbolViewHeight)]"
options:0
metrics:metrics
views:NSDictionaryOfVariableBindings(_symbolView)]];

CGFloat topInset = CGRectGetHeight(self.frame) - 4;
CGFloat topInset = CGRectGetHeight(_messageView.frame) - 4;

[self addConstraint:[NSLayoutConstraint
[_messageView addConstraint:[NSLayoutConstraint
constraintWithItem:_symbolView
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:self
toItem:_messageView
attribute:NSLayoutAttributeBottom
multiplier:0.0f constant:topInset]];

[self addConstraint:[NSLayoutConstraint
[_messageView addConstraint:[NSLayoutConstraint
constraintWithItem:_textLabel
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
Expand All @@ -205,7 +212,8 @@ - (void)updateConstraints
- (void)setFrame:(CGRect)frame
{
[super setFrame:frame];
self.blurLayer.frame = self.bounds;
_messageView.frame = [self hiddenFrame];
self.blurLayer.frame = _messageView.bounds;
}

#pragma mark - tint color
Expand All @@ -224,33 +232,55 @@ - (void)setVisible:(BOOL)visible animated:(BOOL)animated completion:(void (^)())
{
if (_visible != visible) {

NSTimeInterval animationDuration = animated ? 0.4 : 0.0;
CGRect startFrame = visible ? [self hiddenFrame]:[self visibleFrame];
CGRect endFrame = visible ? [self visibleFrame] : [self hiddenFrame];
self.frame = [self bigFrame];

if (!self.superview) {
self.frame = startFrame;

if (self.parentNavigationController) {
[self.parentNavigationController.view insertSubview:self belowSubview:self.parentNavigationController.navigationBar];
} else {
[self.parentViewController.view addSubview:self];
}

if (self.parentNavigationController) {
[self.parentNavigationController.view insertSubview:self belowSubview:self.parentNavigationController.navigationBar];
} else {
[self.parentViewController.view addSubview:self];
}

__block typeof(self) weakself = self;
[UIView animateWithDuration:animationDuration animations:^{
[weakself setFrame:endFrame];
} completion:^(BOOL finished) {
if (!visible) {
[weakself removeFromSuperview];
}
if (visible) {
_messageView.frame = [self hiddenFrame];

UIDynamicAnimator *animator = [[UIDynamicAnimator alloc] initWithReferenceView:self];

UIGravityBehavior *gravityBehavior = [[UIGravityBehavior alloc] initWithItems:@[_messageView]];

UICollisionBehavior *collisionBehavior = [[UICollisionBehavior alloc] initWithItems:@[_messageView]];
collisionBehavior.translatesReferenceBoundsIntoBoundary = YES;

UIDynamicItemBehavior *dynamicItem = [[UIDynamicItemBehavior alloc] initWithItems:@[_messageView]];
dynamicItem.elasticity = 0.4;
dynamicItem.allowsRotation = NO;

[animator addBehavior:dynamicItem];
[animator addBehavior:collisionBehavior];
[animator addBehavior:gravityBehavior];

_animator = animator;

if (completion) {
completion();
double delayInSeconds = 0.5;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
completion();
});
}
}];

}else{
CGRect frame = [self hiddenFrame];
frame.origin.y = self.bounds.size.height - frame.size.height;
_messageView.frame = frame;
[UIView animateWithDuration:0.4 animations:^{
_messageView.frame = [self hiddenFrame];
}completion:^(BOOL finished) {
[self removeFromSuperview];
if (completion) {
completion();
}
}];
}

_visible = visible;
} else if (completion) {
completion();
Expand Down Expand Up @@ -283,7 +313,13 @@ - (void)dismissWithStyle:(CSNotificationViewStyle)style message:(NSString *)mess
//Workaround as there is a bug: sometimes, when accessing topLayoutGuide, it will render contentSize of UITableViewControllers to be {0, 0}
- (CGFloat)topLayoutGuideLengthCalculation
{
CGFloat top = CGRectGetHeight([[UIApplication sharedApplication] statusBarFrame]);
CGFloat top = 0;

if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
top = CGRectGetWidth([[UIApplication sharedApplication] statusBarFrame]);
}else{
top = CGRectGetHeight([[UIApplication sharedApplication] statusBarFrame]);
}

if (self.parentNavigationController) {

Expand All @@ -293,35 +329,43 @@ - (CGFloat)topLayoutGuideLengthCalculation
return top;
}

- (CGRect)visibleFrame
- (CGFloat)widthLayoutGuideLengthCalculation
{
UIViewController* viewController = self.parentNavigationController ?: self.parentViewController;
CGFloat width = 0;

if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
width = CGRectGetHeight([[UIApplication sharedApplication] statusBarFrame]);
}else{
width = CGRectGetWidth([[UIApplication sharedApplication] statusBarFrame]);
}

return width;
}

- (CGRect)bigFrame
{
CGFloat topLayoutGuideLength = [self topLayoutGuideLengthCalculation];

CGFloat totalWidth = [self widthLayoutGuideLengthCalculation];

CGRect displayFrame = CGRectMake(0, 0, CGRectGetWidth(viewController.view.frame),
kCSNotificationViewHeight + topLayoutGuideLength);
CGRect displayFrame = CGRectMake(0, -(topLayoutGuideLength + kCSNotificationViewHeight),
totalWidth, 2*(kCSNotificationViewHeight + topLayoutGuideLength));

return displayFrame;
}

- (CGRect)hiddenFrame
{
UIViewController* viewController = self.parentNavigationController ?: self.parentViewController;

CGFloat topLayoutGuideLength = [self topLayoutGuideLengthCalculation];

CGRect offscreenFrame = CGRectMake(0, -kCSNotificationViewHeight - topLayoutGuideLength,
CGRectGetWidth(viewController.view.frame),
kCSNotificationViewHeight + topLayoutGuideLength);

CGRect offscreenFrame = self.bounds;
offscreenFrame.size.height /= 2;
return offscreenFrame;
}

- (CGSize)intrinsicContentSize
{
CGRect currentRect = self.visible ? [self visibleFrame] : [self hiddenFrame];
return currentRect.size;
UIViewController* viewController = self.parentNavigationController ?: self.parentViewController;
return CGSizeMake(CGRectGetWidth(viewController.view.frame),
kCSNotificationViewHeight);
}

#pragma mark - symbol view
Expand Down Expand Up @@ -349,7 +393,7 @@ - (void)updateSymbolView
_symbolView.tag = kCSNotificationViewEmptySymbolViewTag;
}
_symbolView.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_symbolView];
[_messageView addSubview:_symbolView];
[self setNeedsUpdateConstraints];

}
Expand Down