如何查找鼠标是否在视图上方

Question

我需要找到鼠标位置是否在NSView的rect内.

我会用NSPointInRect(point, rect),但我需要将rect坐标转换为屏幕坐标,我不知道如何.任何帮助将非常感激!

Answer 1

这样的事情对你有用:

NSView* myView; // The view you are converting coordinates to
NSPoint globalLocation = [ NSEvent mouseLocation ];
NSPoint windowLocation = [ [ myView window ] convertScreenToBase: globalLocation ];
NSPoint viewLocation = [ myView convertPoint: windowLocation fromView: nil ];
if( NSPointInRect( viewLocation, [ myView bounds ] ) ) {
    // Do your thing here
}

我个人并没有使用这么多局部变量,但希望这会使这个例子更加清晰.

Answer 2

使用NSView的convertPoint:fromView:方法,将fromView作为nil,将窗口坐标中的点转换为视图的坐标系.

将鼠标点转换为视图坐标系后,我会使用NSView的鼠标:inRect:方法而不是NSPointInRect,因为前者也会考虑翻转坐标系.

或者,您可以使用跟踪区域对象.

Answer 3

NSView isMousePoint函数对我有用，无需担心任何 CG。

func isMouseInView(view: NSView) -> Bool? {
    if let window = view.window {
        return view.isMousePoint(window.mouseLocationOutsideOfEventStream, in: view.frame)
    }
    return nil
}

Answer 4

一些使用鼠标的代码:inRect :(推荐方式;考虑翻转坐标)

CGPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
CGRect rect = [self bounds];
if ([self mouse:point inRect:rect]) {
}