从顶部降低uiview的高度

你可以更新frame.origin.y和高度。

如果reduceHeightSize为正;

customView = CGRect(x: self.view.frame.origin.x, y: self.view.frame.origin.y + reduceHeightSize , width: self.view.frame.width , height: self.view.frame.height - reduceHeightSize)

如果你把它存储在负的减重;

customView = CGRect(x: self.view.frame.origin.x, y: self.view.frame.origin.y - reduceHeightSize , width: self.view.frame.width , height: self.view.frame.height + reduceHeightSize)

最好保持大小而不是方向。

你需要像…

customView = CGRect(x: 0, y:reduceHeightSize , width: self.view.frame.width , height: self.view.frame.height - reduceHeightSize)

customView = CGRect(x: 0, y:0 , width: self.view.frame.width , height: self.view.frame.height - reduceHeightSize)

代码的问题在于 Height 在里面 CGRect . 你想改变 view 所以你还需要改变 y 所以最后你的代码

customView = CGRect(x: 0, y: reduceHeightSize , width: self.view.frame.width , height: self.view.frame.height - reduceHeightSize)

如果我正确地理解了您的问题,那可能是因为您的视图没有被约束/锚定在底部,因此在顶部默认为reduce。尝试添加底部约束。

我只是想清楚我需要什么:

  customView.frame = CGRect(x: 0, y: self.view.frame.origin.y - reduceHeightSize , width: self.view.frame.width , height: self.view.frame.height + reduceHeightSize)