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      1. 如何根据内容调整 UITextView 的大小?

        How do I size a UITextView to its content?(如何根据内容调整 UITextView 的大小?)

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                  本文介绍了如何根据内容调整 UITextView 的大小?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  有没有一种好方法可以调整 UITextView 的大小以符合其内容?比如说我有一个 UITextView 包含一行文本:

                  Is there a good way to adjust the size of a UITextView to conform to its content? Say for instance I have a UITextView that contains one line of text:

                  "Hello world"
                  

                  然后我添加另一行文本:

                  I then add another line of text:

                  "Goodbye world"
                  

                  在 Cocoa Touch 中是否有一个好方法可以获取 rect 来保存文本视图中的所有行,以便我可以相应地调整父视图?

                  Is there a good way in Cocoa Touch to get the rect that will hold all of the lines in the text view so that I can adjust the parent view accordingly?

                  作为另一个示例,查看日历应用程序中事件的注释字段 - 请注意单元格(以及它包含的 UITextView)如何扩展以容纳注释字符串中的所有文本行.

                  As another example, look at the notes' field for events in the Calendar application - note how the cell (and the UITextView it contains) expands to hold all lines of text in the notes' string.

                  推荐答案

                  这适用于 iOS 6.1 和 iOS 7:

                  This works for both iOS 6.1 and iOS 7:

                  - (void)textViewDidChange:(UITextView *)textView
                  {
                      CGFloat fixedWidth = textView.frame.size.width;
                      CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
                      CGRect newFrame = textView.frame;
                      newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
                      textView.frame = newFrame;
                  }
                  

                  或在 Swift 中(适用于 iOS 11 中的 Swift 4.1)

                  Or in Swift (Works with Swift 4.1 in iOS 11)

                  let fixedWidth = textView.frame.size.width
                  let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
                  textView.frame.size = CGSize(width: max(newSize.width, fixedWidth), height: newSize.height)
                  

                  如果您想要支持 iOS 6.1,那么您还应该:

                  If you want support for iOS 6.1 then you should also:

                  textview.scrollEnabled = NO;
                  

                  这篇关于如何根据内容调整 UITextView 的大小?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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