的NSView自动调整大小以适应内容查看

Question

CustomView *customView = [[CustomView alloc] init]; 
[self.window.contentView addSubview:customView]; 

我怎样才能让customView.frame.size.height恒等于contentView.frame.size.height当窗口大小调整，并在同一时间customView.frame.size.width = 20;？

Answer 1

设置自定义视图的autoresizingMask：

CustomView *customView = [[CustomView alloc] init]; 
customView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable; 
[self.window.contentView addSubview:customView]; 

Answer 2

斯威夫特版本，适用autoresizingMask：

let customView = CustomView() 
    customView.autoresizingMask = [.viewWidthSizable, .viewHeightSizable] 
    self.window.contentView.addSubview(customView)