以编程方式设置UIView的自动调整掩码？

Question

我必须以编程方式设置autoresizingMask UIView.

我不知道如何实现这一点.

Answer 1

为了实现你在屏幕截图中所拥有的,你需要做与DrummerB建议相反的事情.你想要一个固定的上边距,这样你就可以使每一方都灵活:

目标C:

view.autoresizingMask = UIViewAutoresizingFlexibleRightMargin |
                        UIViewAutoresizingFlexibleLeftMargin |
                        UIViewAutoresizingFlexibleBottomMargin;

在设置了侧灵活意味着,这将是固定的(默认行为),这就是为什么有是UIViewAutoResizingFixedTopMargin没有这样的事情(因为它同样不设置UIViewAutoresizingFlexibleTopMargin)

编辑Swift:

view.autoresizingMask = [.FlexibleRightMargin, .FlexibleLeftMargin, .FlexibleBottomMargin]

感谢Tom Calmon添加swift版本1st.

干杯.

Answer 2

您必须设置视图的autoresizingMask属性:

view.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;

可能的值定义UIViewAutoresizing如下:

enum {
   UIViewAutoresizingNone                 = 0,
   UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,
   UIViewAutoresizingFlexibleWidth        = 1 << 1,
   UIViewAutoresizingFlexibleRightMargin  = 1 << 2,
   UIViewAutoresizingFlexibleTopMargin    = 1 << 3,
   UIViewAutoresizingFlexibleHeight       = 1 << 4,
   UIViewAutoresizingFlexibleBottomMargin = 1 << 5
};
typedef NSUInteger UIViewAutoresizing;

您可以使用按位OR运算符设置多个值|.

Answer 3

Swift 2.0:

view.autoresizingMask = [.FlexibleRightMargin, .FlexibleLeftMargin, .FlexibleBottomMargin]

Answer 4

斯威夫特 4.1：

view.autoresizingMask = [.flexibleHeight, .flexibleWidth, .flexibleTopMargin, .flexibleRightMargin, .flexibleLeftMargin, .flexibleBottomMargin]