iOS 控件像 android 一样隐藏和消失

问题描述

我在 UI 设计中使用了带有自动布局的情节提要.基本上在 android 中会有三个不同的属性，比如 Visible、Invisible 和 Gone.

I have used storyboard with autolayout for my UI design. Basically in android there are three different properties will be there like Visible, Invisible and Gone.

例如:

   1) android:visibility="gone" // used to hide the control and as well as space
      (or)
      CONTROLNAME.setVisibility(View.GONE);
   2)  android:visibility="invisible" // used to hide the control but it will take space
      (or)
      CONTROLNAME.setVisibility(View.INVISIBLE);

在 iOS 中，

objective-c

  1) ?
  2) [CONTROLNAME setHidden:TRUE]; // used to hide the control but it will take space

迅速

  1) ?
  2) CONTROLNAME.isHidden = true  // used to hide the control but it will take space

作为 iOS 中的 Gone 我已经从谷歌搜索但我无法找到解决方案.

for act as a Gone in iOS i have searched from google but i can't able to find the Solution.

推荐答案

要删除视图(控件)占用的空间，可以将其框架的 size 减小为零或将其从查看层次结构.IE.通过在控件上调用 removeFromSuperview.

To remove the space occupied by a view(control) can either reduce the size of its frame to zero or remove it from the view hierarchy. I.e. by calling removeFromSuperview on the control.

例如，如果您必须删除 UITextField(例如 CONTROLNAME)占用的空间，那么您可以使用:

For example if you have to remove the space occupied by a UITextField (say CONTROLNAME), then you can either use:

CGRect tempFrame = CONTROLNAME.frame;
CGSize currentSize = tempFrame.size; //for later use
tempFrame.size = CGSizeZero;
CONTROLNAME.frame = tempFrame;

或

CGRect currentFrame = CONTROLNAME.frame; //for later use
[CONTROLNAME removeFromSuperview];

更新:

在第一种情况下，您必须存储较早的大小才能将控件恢复到其初始位置.

In the first case you will have to store the earlier size to bring back the control to its initial position.

CGRect tempFrame = CONTROLNAME.frame;
tempFrame.size = currentSize; //set to initial value
CONTROLNAME.frame = tempFrame;

在第二种情况下，您必须存储控件的框架以将其带回其初始位置(如果它是局部变量或弱实例变量，则还包括控件本身).

In the second case you will have to store the frame of the control to bring it back to its initial position (and also the control itself if it is a local variable or weak instance variable).

CONTROLNAME.frame = currentFrame;

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