在scrollview中隐藏视图后删除空格？ [英] Remove white Space after hide views in scrollview?

问题描述

我有 UIScrollview ，里面有动态视图（Label，Imageview）。我隐藏了一些视图，但是有白色的空白区域。如何删除它？

我尝试使用以下代码，但它不起作用，

  [self.view addConstraint：[NSLayoutConstraint constraintWithItem：myView属性：NSLayoutAttributeHeight relatedBy：NSLayoutRelationEqual toItem：nil属性：NSLayoutAttributeNotAnAttribute multiplier：1.0 constant：0]]; 
  

文件的布局：

  -View 
 
 -ScrollView 
 
 -UIImageView 
 
 -UIButton 
 
  - UIButton 
 
 -UILable 
 
 -UILable 
 
 -UIButton 
 
 -UILable 
 
  - UILable 
  

解决方案

只是躲在意见不会帮助，因为它还是会发生的。你有几个选择：
1. scrollView中的每个视图都应该有高度约束，当需要隐藏时应该设置为0。然后你应该打电话

  [scrollView setNeedsLayout]; 
 [scrollView layoutIfNeeded]; 
  

2. 您可以通过调用从scrollView中删除不需要的视图





[viewToHide removeFromSuperview];




I have UIScrollview with dynamic views(Label, Imageview) inside it. I hide some views but white blank space is there. how can I remove it?

I tried with below code but it doesn't work,

[self.view addConstraint:[NSLayoutConstraint constraintWithItem:myView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:0]];

The layout of File Like:

-View

 -ScrollView

  -UIImageView

  -UIButton

  -UIButton

  -UILable

  -UILable

  -UIButton

  -UILable

  -UILable

解决方案

Just hiding views won't help, as it still will take place. You have several options: 1. Each of views inside scrollView should have height constraint that should be set to 0 when hiding is required. Then you should call

[scrollView setNeedsLayout];
[scrollView layoutIfNeeded];

2. You can remove unneeded views from scrollView by calling

[viewToHide removeFromSuperview];

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