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[ASControlNode] modify hitTestDebug tool to highlight edges clipped by one or more superviewsw

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This commit is contained in:
Hannah Troisi
2016-04-09 21:36:57 -07:00
parent 2fd4401832
commit f633f6fff0
1 changed files with 57 additions and 3 deletions
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60
AsyncDisplayKit/ASControlNode.mm
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@@ -256,7 +256,6 @@ static BOOL _enableHitTestDebug = NO;
_debugHighlightOverlay = [[ASImageNode alloc] init];
_debugHighlightOverlay.zPosition = 1000; // CALayer doesn't have -moveSublayerToFront, but this will ensure we're over the top of any siblings.
_debugHighlightOverlay.layerBacked = YES;
_debugHighlightOverlay.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.4];
[self addSubnode:_debugHighlightOverlay];
}
}
@@ -468,7 +467,9 @@ void _ASEnumerateControlEventsIncludedInMaskWithBlock(ASControlNodeEvent mask, v
// Even if our parents don't have clipsToBounds set and would allow us to display the debug overlay, UIKit event delivery (hitTest:)
// will not search sub-hierarchies if one of our parents does not return YES for pointInside:. In such a scenario, hitTestSlop
// may not be able to expand the tap target as much as desired without also setting some hitTestSlop on the limiting parents.
CGRect intersectRect = UIEdgeInsetsInsetRect(self.bounds, [self hitTestSlop]);
CGRect originalRect = UIEdgeInsetsInsetRect(self.bounds, [self hitTestSlop]);
CGRect intersectRect = originalRect;
UIRectEdge clippedEdges = UIRectEdgeNone;
CALayer *layer = self.layer;
CALayer *intersectLayer = layer;
CALayer *intersectSuperlayer = layer.superlayer;
@@ -492,7 +493,60 @@ void _ASEnumerateControlEventsIncludedInMaskWithBlock(ASControlNodeEvent mask, v
intersectSuperlayer = intersectLayer.superlayer;
}
_debugHighlightOverlay.frame = [intersectLayer convertRect:intersectRect toLayer:layer];
CGRect finalRect = [intersectLayer convertRect:intersectRect toLayer:layer];
UIColor *fillColor = [[UIColor greenColor] colorWithAlphaComponent:0.4];
// determine which edges were clipped
if (!CGSizeEqualToSize(originalRect.size, finalRect.size)) {
if (originalRect.origin.y != finalRect.origin.y) {
clippedEdges |= UIRectEdgeTop;
}
if (originalRect.origin.x != finalRect.origin.x) {
clippedEdges |= UIRectEdgeLeft;
}
if (CGRectGetMaxY(originalRect) != CGRectGetMaxY(finalRect)) {
clippedEdges |= UIRectEdgeBottom;
}
if (CGRectGetMaxX(originalRect) != CGRectGetMaxX(finalRect)) {
clippedEdges |= UIRectEdgeRight;
}
const CGFloat borderWidth = 2.0;
const UIColor *borderColor = [UIColor colorWithRed:30/255.0 green:90/255.0 blue:50/255.0 alpha:0.7];
CGRect imgRect = CGRectMake(0, 0, 2.0 * borderWidth + 1.0, 2.0 * borderWidth + 1.0);
UIGraphicsBeginImageContext(imgRect.size);
[fillColor setFill];
UIRectFill(imgRect);
[borderColor setFill];
if (clippedEdges & UIRectEdgeTop) {
UIRectFill(CGRectMake(0.0, 0.0, imgRect.size.width, borderWidth));
}
if (clippedEdges & UIRectEdgeLeft) {
UIRectFill(CGRectMake(0.0, 0.0, borderWidth, imgRect.size.height));
}
if (clippedEdges & UIRectEdgeBottom) {
UIRectFill(CGRectMake(0.0, imgRect.size.height - borderWidth, imgRect.size.width, borderWidth));
}
if (clippedEdges & UIRectEdgeRight) {
UIRectFill(CGRectMake(imgRect.size.width - borderWidth, 0.0, borderWidth, imgRect.size.height));
}
UIImage *debugHighlightImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIEdgeInsets edgeInsets = UIEdgeInsetsMake(borderWidth, borderWidth, borderWidth, borderWidth);
_debugHighlightOverlay.image = [debugHighlightImage resizableImageWithCapInsets:edgeInsets
resizingMode:UIImageResizingModeStretch];
_debugHighlightOverlay.backgroundColor = nil;
} else {
_debugHighlightOverlay.backgroundColor = fillColor;
}
_debugHighlightOverlay.frame = finalRect;
}
}