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Support for TableView overlap of Parallax View #33

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Support for TableView overlap of Parallax View #33

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4 changes: 1 addition & 3 deletions APParallaxHeader/UIScrollView+APParallaxHeader.h
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Original file line number Diff line number Diff line change
Expand Up @@ -14,10 +14,9 @@

@interface UIScrollView (APParallaxHeader)

- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height andShadow:(BOOL)shadow;
- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height andShadow:(BOOL)shadow overlap:(CGFloat)overlap;
- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height;
- (void)addParallaxWithView:(UIView*)view andHeight:(CGFloat)height;
- (void)addParallaxWithView:(UIView*)view andHeight:(CGFloat)height andShadow:(BOOL)shadow;

@property (nonatomic, strong, readonly) APParallaxView *parallaxView;
@property (nonatomic, assign) BOOL showsParallax;
Expand All @@ -41,7 +40,6 @@ typedef NS_ENUM(NSUInteger, APParallaxTrackingState) {
@property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) UIView *currentSubView;
@property (nonatomic, strong) APParallaxShadowView *shadowView;
@property (nonatomic, strong) UIView *customView;

- (id)initWithFrame:(CGRect)frame andShadow:(BOOL)shadow;

Expand Down
85 changes: 26 additions & 59 deletions APParallaxHeader/UIScrollView+APParallaxHeader.m
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ @interface APParallaxView ()
@property (nonatomic, weak) UIScrollView *scrollView;
@property (nonatomic, readwrite) CGFloat originalTopInset;
@property (nonatomic) CGFloat parallaxHeight;
@property (nonatomic) CGFloat overlap;

@property(nonatomic, assign) BOOL isObserving;

Expand All @@ -31,10 +32,10 @@ @interface APParallaxView ()
@implementation UIScrollView (APParallaxHeader)

- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height {
[self addParallaxWithImage:image andHeight:height andShadow:YES];
[self addParallaxWithImage:image andHeight:height andShadow:YES overlap:0];
}

- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height andShadow:(BOOL)shadow {
- (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height andShadow:(BOOL)shadow overlap:(CGFloat)overlap {
if(self.parallaxView) {
if(self.parallaxView.currentSubView) {
[self.parallaxView.currentSubView removeFromSuperview];
Expand All @@ -43,46 +44,43 @@ - (void)addParallaxWithImage:(UIImage *)image andHeight:(CGFloat)height andShado
}
else
{
APParallaxView *parallaxView = [[APParallaxView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width*2, height) andShadow:shadow];
[parallaxView setClipsToBounds:YES];
[parallaxView.imageView setImage:image];
APParallaxView *view = [[APParallaxView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, height) andShadow:shadow];
[view setClipsToBounds:YES];
[view.imageView setImage:image];

parallaxView.scrollView = self;
parallaxView.parallaxHeight = height;
[self addSubview:parallaxView];
view.scrollView = self;
view.parallaxHeight = height;
view.overlap = overlap;
[self insertSubview:view atIndex:0];

parallaxView.originalTopInset = self.contentInset.top;
view.originalTopInset = self.contentInset.top;

UIEdgeInsets newInset = self.contentInset;
newInset.top = height;
newInset.top = height - overlap;
self.contentInset = newInset;

self.parallaxView = parallaxView;
self.parallaxView = view;
self.showsParallax = YES;
}
}

- (void)addParallaxWithView:(UIView*)view andHeight:(CGFloat)height {
[self addParallaxWithView:view andHeight:height andShadow:YES];
}

- (void)addParallaxWithView:(UIView*)view andHeight:(CGFloat)height andShadow:(BOOL)shadow {
if(self.parallaxView) {
[self.parallaxView.currentSubView removeFromSuperview];
[view setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[self.parallaxView setCustomView:view];
[self.parallaxView addSubview:view];
}
else
{
APParallaxView *parallaxView = [[APParallaxView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, height) andShadow:shadow];
APParallaxView *parallaxView = [[APParallaxView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, height)];
[parallaxView setClipsToBounds:YES];

[parallaxView setCustomView:view];
[view setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[parallaxView addSubview:view];

parallaxView.scrollView = self;
parallaxView.parallaxHeight = height;
[self addSubview:parallaxView];

parallaxView.originalTopInset = self.contentInset.top;

UIEdgeInsets newInset = self.contentInset;
Expand Down Expand Up @@ -187,27 +185,21 @@ - (id)initWithFrame:(CGRect)frame {
- (id)initWithFrame:(CGRect)frame andShadow:(BOOL)shadow {
if(self = [super initWithFrame:frame]) {

[self setBackgroundColor:[UIColor clearColor]];

// default styling values
[self setAutoresizingMask:UIViewAutoresizingFlexibleHeight];
[self setState:APParallaxTrackingActive];
[self setAutoresizesSubviews:YES];

self.imageView = [[UIImageView alloc] init];
self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(frame), CGRectGetHeight(frame))];
[self.imageView setAutoresizingMask:UIViewAutoresizingFlexibleHeight];
[self.imageView setContentMode:UIViewContentModeScaleAspectFill];
[self.imageView setClipsToBounds:YES];
[self addSubview:self.imageView];

[self.imageView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[imageView]|" options:0 metrics:nil views:@{@"imageView" : self.imageView}]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[imageView]|" options:0 metrics:nil views:@{@"imageView" : self.imageView}]];

if (shadow) {
self.shadowView = [[APParallaxShadowView alloc] init];
self.shadowView = [[APParallaxShadowView alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(frame)-8, CGRectGetWidth(frame), 8)];
[self.shadowView setAutoresizingMask:UIViewAutoresizingFlexibleTopMargin];
[self addSubview:self.shadowView];
[self.shadowView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[shadowView(8.0)]|" options:NSLayoutFormatAlignAllBottom metrics:nil views:@{@"shadowView" : self.shadowView}]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[shadowView]|" options:0 metrics:nil views:@{@"shadowView" : self.shadowView}]];
}
}

Expand All @@ -233,38 +225,13 @@ - (void)addSubview:(UIView *)view {
self.currentSubView = view;
}

- (void)setCustomView:(UIView *)customView
{
if (_customView) {
[_customView removeFromSuperview];
}

_customView = customView;

[self addSubview:customView];
[customView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[customView]|" options:0 metrics:nil views:@{@"customView" : customView}]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[customView]|" options:0 metrics:nil views:@{@"customView" : customView}]];
}

- (void)layoutSubviews
{
[super layoutSubviews];

if (self.shadowView) {
[self bringSubviewToFront:self.shadowView];
}
}

#pragma mark - Observing

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if([keyPath isEqualToString:@"contentOffset"]) {
if([keyPath isEqualToString:@"contentOffset"])
[self scrollViewDidScroll:[[change valueForKey:NSKeyValueChangeNewKey] CGPointValue]];
}
else if([keyPath isEqualToString:@"frame"]) {
else if([keyPath isEqualToString:@"frame"])
[self layoutSubviews];
}
}

- (void)scrollViewDidScroll:(CGPoint)contentOffset {
Expand All @@ -276,7 +243,7 @@ - (void)scrollViewDidScroll:(CGPoint)contentOffset {
}

if(self.state == APParallaxTrackingActive) {
CGFloat yOffset = contentOffset.y*-1;
CGFloat yOffset = (contentOffset.y*-1) + self.overlap;
if ([self.delegate respondsToSelector:@selector(parallaxView:willChangeFrame:)]) {
[self.delegate parallaxView:self willChangeFrame:self.frame];
}
Expand Down