在可可触摸中以编程方式设置视图位置 [英] Set view position to top right programmatically in cocoa touch

问题描述

我需要确保一个视图A（大小：200x200）始终与第二个视图B（全屏尺寸）内的右上角对齐。我想确保视图A保持在该位置，无论设备方向如何。真理是我没有问题，当使用界面构建器来定位视图，但我需要以编程方式构造。我想我应该使用一些自动调整设置，你能告诉我应该把视图对齐它的超视图的右上角。

解决方案

  UIView parentView //全屏视图
 UIView视图// 200x200视图
 
 [parentView addSubview：view]; 
 CGRect frame = view.frame; 
 
 //右上方对齐
 CGFloat xPosition = CGRectGetWidth（parentView.frame） -  CGRectGetWidth（frame）; 
 frame.origin = CGPointMake（ceil（xPosition），0.0）; 
 view.frame = frame; 
 
 //自动调整大小，因此它保持在右上角（灵活的左边和灵活的底边距）
 view.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleBottomMargin 
  

将视图定位在右上角，并设置自动调整掩码，使其保持在该位置。 / p>

I need to make sure that one view A (size: 200x200) is always aligned to top right corner inside second view B (full screen size). I want to make sure that view A stays in that place regardless of device orientation. Truth is I have no problem with this when using interface builder to position the views but I need to construct this programmatically. I suppose I should use some autoresizing settings, could you tell me which one is supposed to align the view to top right corner of its superview?

解决方案

UIView parentView  //your full screen view
UIView view //the 200x200 view

[parentView addSubview:view];
CGRect frame = view.frame;

//align on top right
CGFloat xPosition = CGRectGetWidth(parentView.frame) - CGRectGetWidth(frame);
frame.origin = CGPointMake(ceil(xPosition), 0.0);
view.frame = frame;

//autoresizing so it stays at top right (flexible left and flexible bottom margin)
view.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleBottomMargin

That positions the view on top right and set's the autoresizing mask so it stays at that position.

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