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PONested UIView inside UIView collision detection and Touch forwarding
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2012-09-02T10:39:36.630
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2012-09-02T10:49:24.160
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2012-09-02T10:46:32.480
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<img src="https://i.stack.imgur.com/yPZt7.png" alt="problemStatement"> Hi Guys, I am working on Drag and Drop for iPad. My problem is as under: I have created a custom view names ShapeView (see left on my image). I am creating instances of ShapeView in ShapeViewController (right side of the image). There is a placeholder in ShapeViewController (see the yellow triangle). I need to drop the shapeView objects on the placeholder which is in the ShapeViewController. For which the following code works fine: <pre><code>-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; if ([touch.view class] == [ShapeMatchView class]) { ShapeMatchView *currentShapeView = (ShapeMatchView *)touch.view; if (CGRectIntersectsRect(theBigImageView.frame, touch.view.frame)) { } } } </code></pre> But I need to ensure that the ShapeView object is exactly inside the triangle. To ensure that I have added view points (UIViews) (see 1,2,3,4 on ShapeView object). I have one method in ShapeView to check the collision: <pre><code>-(BOOL)hasHitTestDoneWithObject:(UIImageView *)object { BOOL retval = NO; if (CGRectIntersectsRect(topLeft.frame,object.frame) && CGRectIntersectsRect(topRight.frame, object.frame) && CGRectIntersectsRect(bottomLeft.frame, object.frame) && CGRectIntersectsRect(bottomRight.frame, object.frame)) { retval = YES; } return retval; } </code></pre> In ShapeViewController: <pre><code>-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; if ([touch.view class] == [ShapeMatchView class]) { ShapeMatchView *currentShapeView = (ShapeMatchView *)touch.view; if ([currentShapeView hasHitTestDoneWithObject:theBigImageView]) { // Never comes here } } } </code></pre> Where I am doing wrong? Please guide. Thanks in advance!
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<objective-c><ios><ipad><uiview>
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Nested UIView inside UIView collision detection and Touch forwarding
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