iOS：UITextView设置高度等于内容高度 [英] iOS: UITextView set height equal to content height

问题描述

我有一个禁用滚动的UITextView，我需要设置UITextView的高度以匹配文本内容的高度。我尝试了各种方法，发现互联网没有结果。这是我的UITextView布局代码：

   - （void）viewDidLayoutSubviews {
 // UITextView被命名jobDescrip 
 jobDescrip.scrollEnabled = NO; 
 [jobDescrip sizeToFit]; 
 [jobDescrip layoutIfNeeded]; 
} 
  

我还在viewDidAppear：方法中尝试了这段代码。有人可以使用自动布局为iOS 7.0及更高版本的问题发布代码吗？

解决方案

你试过这个吗？我添加了一个按钮，其动作方法中包含流动的代码，我可以看到高度已更改为文本高度。

  CGSize size = [self.textView systemLayoutSizeFittingSize：self.textView.contentSize]; 
 CGRect frame = self.textView.frame; 
 frame.size.height = size.height; 
 self.textView.frame = frame; 
  

修改

<我为superview约束添加了一个底部空间并将其设置为IBOutlet属性，然后在viewDidAppear中我更改了约束常量。

  - （void）viewDidAppear：（BOOL）动画
 {
 [super viewDidAppear：animated]; 
 self.textView.contentInset = UIEdgeInsetsZero; 
 CGSize size = [self.textView systemLayoutSizeFittingSize：self.textView.contentSize]; 
 self.heightConstraint.constant  -  = size.height  -  self.textView.frame.size.height; 
 self.textView.scrollEnabled = NO; 
 [self.textView setNeedsUpdateConstraints]; 
} 
  

I have a UITextView with disabled scrolling and I need to set the height of the UITextView to match the height of the text content. I have tried various methods found the internet with no results. This is my code for the layout of the UITextView:

-(void) viewDidLayoutSubviews {
    // UITextView is named jobDescrip
    jobDescrip.scrollEnabled = NO;
    [jobDescrip sizeToFit];
    [jobDescrip layoutIfNeeded];
}

I have also tried this code in the viewDidAppear: method. Can someone please post code for an iOS 7.0 and later solution to this problem using auto layout?

解决方案

Have you tried this? I added a button, with the flowing code in its action method I can see the height is changed to the text height.

CGSize size = [self.textView systemLayoutSizeFittingSize:self.textView.contentSize];
CGRect frame = self.textView.frame;
frame.size.height = size.height;
self.textView.frame = frame;

Edit

I added a bottom space to superview constraint and set it as IBOutlet property,then in viewDidAppear I changed the constraint constant.

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    self.textView.contentInset = UIEdgeInsetsZero;
    CGSize size = [self.textView systemLayoutSizeFittingSize:self.textView.contentSize];
    self.heightConstraint.constant -= size.height - self.textView.frame.size.height;
    self.textView.scrollEnabled = NO;
    [self.textView setNeedsUpdateConstraints];
}

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