从特定点缩放
我正在使用此代码从特定点进行缩放
CGPoint getCenterPointForRect(CGRect inRect)
{
CGRect screenRect = [[UIScreen mainScreen] bounds];
return CGPointMake((screenRect.size.height-inRect.origin.x)/2,(screenRect.size.width-inRect.origin.y)/2);
}
-(void) startAnimation
{
CGPoint centerPoint = getCenterPointForRect(self.view.frame);
self.view.transform = CGAffineTransformMakeTranslation(centerPoint.x, centerPoint.y);
self.view.transform = CGAffineTransformScale( self.view.transform , 0.001, 0.001);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:kTransitionDuration];
self.view.transform = CGAffineTransformIdentity;
[UIView commitAnimations];
}
没有找到相关结果
已邀请:
1 个回复
黎喊病
你的视图最终占据了整个屏幕，然后它将保持在屏幕中间的中心位置，有点像一个很远的地方，你正朝着它前进。 假设您希望它从（x，y）增长并移动到屏幕中心，那么您需要更多类似的东西：CGPoint locationToZoomFrom = ... populated by you somehow ...; CGPoint vectorFromCentreToPoint = CGPointMake( locationToZoomFrom.x - self.view.center.x, locationToZoomFrom.y - self.view.center.y); self.view.transform = CGAffineTransformMakeTranslation(vectorFromCentreToPoint.x, vectorFromCentreToPoint.y); self.view.transform = CGAffineTransformScale( self.view.transform , 0.001, 0.001);