ASInterfaceState Constants Reference
| Declared in | ASDisplayNode.h |
|---|
ASInterfaceState
Interface state is available on ASDisplayNode and ASDKViewController, and allows checking whether a node is in an interface situation where it is prudent to trigger certain actions: measurement, data loading, display, and visibility (the latter for animations or other onscreen-only effects).
Definition
typedef NS_OPTIONS(NSUInteger, ASInterfaceState ) {
ASInterfaceStateNone = 0,
ASInterfaceStateMeasureLayout = 1 < < 0,
ASInterfaceStatePreload = 1 < < 1,
ASInterfaceStateDisplay = 1 < < 2,
ASInterfaceStateVisible = 1 < < 3,
ASInterfaceStateInHierarchy = ASInterfaceStateMeasureLayout | ASInterfaceStatePreload | ASInterfaceStateDisplay | ASInterfaceStateVisible,
};
Constants
ASInterfaceStateNone-
The element is not predicted to be onscreen soon and preloading should not be performed
Declared In
ASDisplayNode.h. ASInterfaceStateMeasureLayout-
The element may be added to a view soon that could become visible. Measure the layout, including size calculation.
Declared In
ASDisplayNode.h. ASInterfaceStatePreload-
The element is likely enough to come onscreen that disk and/or network data required for display should be fetched.
Declared In
ASDisplayNode.h. ASInterfaceStateDisplay-
The element is very likely to become visible, and concurrent rendering should be executed for any -setNeedsDisplay.
Declared In
ASDisplayNode.h. ASInterfaceStateVisible-
The element is physically onscreen by at least 1 pixel. In practice, all other bit fields should also be set when this flag is set.
Declared In
ASDisplayNode.h. ASInterfaceStateInHierarchy-
The node is not contained in a cell but it is in a window.
Declared In
ASDisplayNode.h.
Declared In
ASDisplayNode.h