旋转图像问题

发布于 2024-11-06 08:00:03 字数 578 浏览 1 评论 0原文

我试图通过触摸和移动来旋转图像。

这是我用于旋转视图的代码

[myView.layer setAnchorPoint:CGPointMake(1.0, 1.0)];

CODE INSIDE touchMoved

CGPoint Location = [[touches anyObject] locationInView:self.view];

Float32 Angle = (atan2(Location.x - myView.layer.center.x, Location.y - myView.layer.center.y));

myView.layer.transform = CGAffineTransformMakeRotation(-Angle);

现在一切都工作正常，除了一个

如果我从视图中间旋转，那么一切工作正常，但是当我尝试从角落旋转它时，它会跳跃并将我的触摸点作为中心（记住我已将视图的右下角固定，请参阅锚点）。我只需将视图旋转到 90 度，但只能使用单指触摸...我不确定我是否能够正确描述我的问题，但问题

原文

I'm trying to rotate an image by just touch and move.

Here is my code for rotating the view

[myView.layer setAnchorPoint:CGPointMake(1.0, 1.0)];

CODE INSIDE touchMoved

CGPoint Location = [[touches anyObject] locationInView:self.view];

Float32 Angle = (atan2(Location.x - myView.layer.center.x, Location.y - myView.layer.center.y));

myView.layer.transform = CGAffineTransformMakeRotation(-Angle);

Now everything works fine except one

If I rotate from the middle of the view then all work fine but when I try to rotate it from corners the it jumps and make my touch point as center (remember i have made lower right side corner of the view fixed, see the anchor point). I just have to rotate the view up to 90 degree but only using single finger touch... I'm not sure if I was able to describe my problem correctly but problem

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