ios - convertPoint :fromView: works well on the simulator, 不在设备上

Question

我很高兴看到这个:answer for how to convert point of a subview它在模拟器上非常适合我。

但由于某种原因，它在设备上不起作用...会不会是设备对 View 位置进行了不同的管理——或者这只是另一个谜？或者(希望)我写错了，你们可以帮忙......:)

这是我的台词:

CGPoint yoel = [imagePressed.imageView convertPoint:imagePressed.frame.origin toView:nil];

Answer 1

我有一个与此问题相关的不同问题，并且注意到在转换矩形时我必须考虑屏幕的比例。 (即它在模拟器上工作不是因为它是模拟器，而是因为模拟器处于非视网膜模式)

// the following convertRect is like asking a view: "what would one of your subviews (aView) have for a frame in my (toView) coordinate space if it were to become my subview?
    _originalFrame = [[aView superview] convertRect: aView.frame toView: self];

    CGFloat scale = [[UIScreen mainScreen] scale];

    _originalFrame.origin.x /= scale;
    _originalFrame.origin.y /= scale;
    _originalFrame.size.width /= scale;
    _originalFrame.size.height /= scale;

    NSLog(@"Converted Frame: %@", NSStringFromCGRect(_originalFrame));