ios 如何获得底部y坐标
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How get bottom y coordinate
提问by Alessio Vinaccia
How can I get the bottom left coordinate, i.e. the maximum y coordinate, of a view in obj-c and Swift?
如何获得 obj-c 和 Swift 中视图的左下角坐标，即最大 y 坐标？
回答by Gabriele Petronella
Supposing that you're talking about UIView, you may want to look at the CGGeometryreference.
假设您正在谈论UIView，您可能需要查看CGGeometry参考资料。
Talking about 'left' and y coordinate doesn't make much sense, but for instance
谈论“左”和 y 坐标没有多大意义，但例如
CGRectGetMaxY(view.frame) // will return the bottommost y coordinate of the view
CGRectGetMinX(view.frame) // will return the leftmost x coordinate of the view
and so on. You get the idea.
等等。你明白了。
In Swift, this is even more convenient, as you can do
在 Swift 中，这更方便，因为您可以这样做
view.frame.maxY // will return the bottommost y coordinate of the view
view.frame.minX // will return the leftmost x coordinate of the view
回答by SeanT
It depends on what you want the coordinate in reference to. If you want the bottom left coordinate in your view's superview you could get the left and bottom with:
这取决于您想要参考的坐标。如果您想要视图的超级视图中的左下角坐标，您可以使用以下命令获得左下角：
view.frame.origin.xfor the left coordinate
view.frame.origin.x对于左坐标
and
和
view.frame.origin.y + view.frame.size.heightfor the bottom coordinate
view.frame.origin.y + view.frame.size.height对于底部坐标
