Session 223 - Enhancing User Experience with Scroll Views

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These are confidential sessions—please refrain from streaming, blogging, or taking pictures Session 223 Enhancing User Experience with Scroll Views Josh Shaffer iOS Frameworks

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Enhancing User Experience with Scroll Views

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Enhancing User Experience with Scroll Views •UIScrollView configuration

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Enhancing User Experience with Scroll Views •UIScrollView configuration •Improving paged scrolling

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Enhancing User Experience with Scroll Views •UIScrollView configuration •Improving paged scrolling •Integrating with OpenGL

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Enhancing User Experience with Scroll Views •UIScrollView configuration •Improving paged scrolling •Integrating with OpenGL •Controlling stop offset

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Review of the basics UIScrollView Configuration

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Content Size

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contentSize.height contentSize.width Content Size

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320 Content Offset

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Content Offset 320

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Content Offset 320

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Content Offset

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View for Zooming in Scroll View

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View for Zooming in Scroll View

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Paged Scrolling

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Paged Scrolling

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View Configuration

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View Configuration

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View Configuration Paging UIScrollView

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View Configuration Paging UIScrollView Zooming UIScrollViews

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View Configuration Paging UIScrollView Zooming UIScrollViews UIImageViews

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View Configuration Paging UIScrollView Zooming UIScrollViews UIImageViews UIPageViewController

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View Configuration UIPageViewController Zooming UIScrollViews UIImageViews

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Page Spacing

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Page Spacing

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Page Spacing UIPageViewControllerOptionInterPageSpacingKey

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Page Spacing

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Page Spacing

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Paged Scrolling

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Paged Scrolling

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Paged Scrolling After view controller

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Paged Scrolling

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Paged Scrolling

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Paged Scrolling Before view controller

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Paged Scrolling

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Zooming

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Zooming

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Paged Scrolling

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Paged Scrolling

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Demo Eliza Block

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Integrating UIScrollView and OpenGL

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UIScrollView

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Demo Eliza Block

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Common surprises Run Loop Modes

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Common surprises Run Loop Modes [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(handleTimer:) userInfo:nil repeats:NO];

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Common surprises Run Loop Modes [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(handleTimer:) userInfo:nil repeats:NO]; NSTimer *timer = [NSTimer timerWithInterval:1.0 target:self selector:@selector(handleTimer:) userInfo:nil repeats:NO];

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Common surprises Run Loop Modes

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Common surprises Run Loop Modes [self performSelector:@selector(performDelayedWork) withObject:nil afterDelay:1.0];

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Common surprises Run Loop Modes [self performSelector:@selector(performDelayedWork) withObject:nil afterDelay:1.0]; [self performSelector:@selector(performDelayedWork) withObject:nil afterDelay:1.0 inModes:@[NSCommonRunLoopModes]];

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UIResponder and Event Delivery

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UIResponder and Event Delivery Parent View

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UIResponder and Event Delivery Parent View Child View

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UIResponder and Event Delivery Parent View Child View

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UIResponder and Event Delivery Parent View Child View Child View

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Parent View UIResponder and Event Delivery Parent View Child View Child View

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Parent View’s View Controller Parent View UIResponder and Event Delivery Parent View Child View Child View

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Window Parent View’s View Controller Parent View UIResponder and Event Delivery Parent View Child View Child View

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Application Window Parent View’s View Controller Parent View UIResponder and Event Delivery Parent View Child View Child View

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Application Delegate Application Window Parent View’s View Controller Parent View UIResponder and Event Delivery Parent View Child View Child View

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Application Delegate Application Window Parent View’s View Controller Parent View UIResponder and Event Delivery Parent View Child View Child View

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UIResponder and Event Delivery OpenGL View Scroll View

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UIResponder and Event Delivery OpenGL View Scroll View

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UIResponder and Event Delivery OpenGL View Scroll View Scroll View

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Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Scroll View Scroll View

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Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Scroll View Scroll View

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How not to do it UIResponder and Event Delivery

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How not to do it UIResponder and Event Delivery - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [[self nextResponder] touchesBegan:touches withEvent:event]; }

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How not to do it UIResponder and Event Delivery - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [[self nextResponder] touchesBegan:touches withEvent:event]; }

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How not to do it UIResponder and Event Delivery - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [[self nextResponder] touchesBegan:touches withEvent:event]; } Application Delegate Application Window OpenGL View’s View Controller OpenGL View Scroll View

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Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Scroll View Scroll View

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Application Delegate Application Window OpenGL View’s View Controller OpenGL View OpenGL View Scroll View Scroll View UIResponder and Event Delivery

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Scroll View OpenGL View Application Delegate Application Window OpenGL View’s View Controller OpenGL View Scroll View UIResponder and Event Delivery

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View Scroll View UIResponder and Event Delivery OpenGL View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View Scroll View UIResponder and Event Delivery OpenGL View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Child View Child View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Child View Child View

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Scroll View Application Delegate Application Window OpenGL View’s View Controller OpenGL View UIResponder and Event Delivery OpenGL View Child View Child View

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Demo Eliza Block

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Deceleration Targets

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Deceleration Targets - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset

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Deceleration Targets - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset { *targetContentOffset = ClosestCarOffset(*targetContentOffset); }

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Demo Eliza Block

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Jake Behrens UI Frameworks Evangelist [email protected] Documentation Scroll View Programming Guide for iOS http://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/UIScrollView_pg Apple Developer Forums http://devforums.apple.com More Information

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Introducing Collection Views Marina Thursday 9:00AM Related Sessions Building Advanced Gesture Recognizers Marina Thursday 11:30AM