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Added Parallax Effects #8

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Added Parallax Effects #8

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18 changes: 17 additions & 1 deletion BTGlassScrollView/BTGlassScrollView.m
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Original file line number Diff line number Diff line change
Expand Up @@ -202,8 +202,13 @@ - (void)createBackgroundView
- (void)createBackgroundImageView
{
_backgroundImageView = [[UIImageView alloc] initWithImage:_backgroundImage];
_backgroundImageView.frame =CGRectInset(_backgroundImageView.frame, -50.0f, -50.0f);
[self addMotionEffectToView: _backgroundImageView magnitude:50.0f];


[_backgroundImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
[_backgroundImageView setContentMode:UIViewContentModeScaleAspectFill];

[_constraitView addSubview:_backgroundImageView];
_blurredBackgroundImageView = [[UIImageView alloc] initWithImage:_blurredBackgroundImage];
[_blurredBackgroundImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
Expand All @@ -216,7 +221,18 @@ - (void)createBackgroundImageView
[_constraitView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_blurredBackgroundImageView]|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_blurredBackgroundImageView)]];
[_constraitView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_blurredBackgroundImageView]|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(_blurredBackgroundImageView)]];
}

- (void)addMotionEffectToView:(UIView*)view magnitude:(CGFloat)magnitude {

UIInterpolatingMotionEffect* xMotion = [[UIInterpolatingMotionEffect alloc]
initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
xMotion.minimumRelativeValue = @(-magnitude); xMotion.maximumRelativeValue = @(magnitude);
UIInterpolatingMotionEffect* yMotion = [[UIInterpolatingMotionEffect alloc]
initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
yMotion.minimumRelativeValue = @(-magnitude); yMotion.maximumRelativeValue = @(magnitude);
UIMotionEffectGroup* group = [[UIMotionEffectGroup alloc] init];
group.motionEffects = @[xMotion, yMotion];
[view addMotionEffect:group];
}

- (void)createForegroundView
{
Expand Down