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Questions and Answers
What are some features of CALayer that are not exposed by UIView?
What are some features of CALayer that are not exposed by UIView?
- 3D transforms and positioning (correct)
- Border colors and rounded corners
- Multistep, linear animations
- Rectangular bounds
How can you apply a drop shadow to a view in iOS?
How can you apply a drop shadow to a view in iOS?
- By utilizing CALayer's features (correct)
- By changing the background color property of the view
- By using UIView's built-in method
- By subclassing UIView
What is one way to achieve nonrectangular bounds for a visual element?
What is one way to achieve nonrectangular bounds for a visual element?
- Setting the frame property of the view
- Using UIView's default settings
- Applying a mask to the content (correct)
- Using a container view
Why would you choose to work with CALayer over UIView for certain effects?
Why would you choose to work with CALayer over UIView for certain effects?
What benefit does CALayer offer in terms of animations compared to UIView?
What benefit does CALayer offer in terms of animations compared to UIView?
How can you create a colored border around a view in an iOS app?
How can you create a colored border around a view in an iOS app?
What is responsible for managing rendering, layout, and animation in iOS?
What is responsible for managing rendering, layout, and animation in iOS?
Which iOS class is conceptually very similar to UIView in handling rectangular objects arranged hierarchically?
Which iOS class is conceptually very similar to UIView in handling rectangular objects arranged hierarchically?
What feature of UIView is not handled by CALayer when it comes to user interaction?
What feature of UIView is not handled by CALayer when it comes to user interaction?
Which mechanism in iOS propagates touch events through the view hierarchy but is not handled by CALayer?
Which mechanism in iOS propagates touch events through the view hierarchy but is not handled by CALayer?
In terms of managing layers and sublayers, which component is aware of parallel hierarchies in iOS?
In terms of managing layers and sublayers, which component is aware of parallel hierarchies in iOS?
Which element in iOS has methods and properties for animations, transforms, and position management similar to UIView?
Which element in iOS has methods and properties for animations, transforms, and position management similar to UIView?
In Mac OS 10.8, what is a benefit of using a layer-backed view instead of a hosted CALayer?
In Mac OS 10.8, what is a benefit of using a layer-backed view instead of a hosted CALayer?
Why might you still want to use a hosted CALayer instead of a layer-backed UIView in a real-world application?
Why might you still want to use a hosted CALayer instead of a layer-backed UIView in a real-world application?
When might you choose to use a hosted CALayer instead of a layer-backed UIView according to the text?
When might you choose to use a hosted CALayer instead of a layer-backed UIView according to the text?
What makes layer-backed views easier to work with compared to hosted layers?
What makes layer-backed views easier to work with compared to hosted layers?
What kind of work might justify the use of a hosted CALayer for performance reasons according to the text?
What kind of work might justify the use of a hosted CALayer for performance reasons according to the text?
When is it recommended to use OpenGL for drawing, based on the text?
When is it recommended to use OpenGL for drawing, based on the text?
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