(Created page with 'UIWindow is a specialized UIView that represents a root node in the view hierarchy. There may be multiple UIWindows. == Non-rectangular windows == {{Function signature …') |
mNo edit summary |
||
| Line 4: | Line 4: | ||
{{Function signature | {{Function signature | ||
|signature=-(BOOL)acceptsGlobalPoint:(CGPoint)point; | |signature=-(BOOL)acceptsGlobalPoint:(CGPoint)point; | ||
|firmware=2.0 – | |firmware=2.0 – 3.1 | ||
}} | }} | ||
Revision as of 20:11, 3 March 2010
UIWindow is a specialized UIView that represents a root node in the view hierarchy. There may be multiple UIWindows.
Non-rectangular windows
| Signature | -(BOOL)acceptsGlobalPoint:(CGPoint)point; |
|---|---|
| Available in | 2.0 – 3.1 |
By default UIWindows are rectangular. While you may modify the interaction shape of a UIView by overriding -pointInside:withEvent:, this method will be ignored in UIWindow. Instead, there is an undocumented method -acceptsGlobalPoint: that does this job:
@interface MyWindow : UIWindow { ... }
-(BOOL)acceptsGlobalPoint:(CGPoint)pt;
@end
@implementation MyWindow
// Makes the window interacts like a circle.
-(BOOL)acceptsGlobalPoint:(CGPoint)pt {
CGFloat dx = pt.x - 160, dy = pt.y - 240;
return (dx*dx+dy*dy <= 100*100);
}
@end
The global point is always in portrait coordinate.
References
- Official reference: UIWindow.
- Header: http://github.com/kennytm/iphone-private-frameworks/blob/master/UIKit/UIWindow2.h