问题描述
我正在尝试实现多页文本编辑布局,如Pages,MS Word等.在OS X上,我可以通过为多个NSTextView创建一个NSLayoutManager和一个NSTextStorage来实现.每个NSTextView都有其自己的NSTextContainer.参见下面的OS X代码.一个简单的示例,其中文本在两个NSTextView之间散布:
I am trying to achieve a multi page text editing layout, as in Pages, MS Word, ... . On OS X I can achieve this by creating one NSLayoutManager with one NSTextStorage for multiple NSTextViews. Each NSTextView has its own NSTextContainer. See below code for OS X. A simple example with text spreading between two NSTextViews:
import Cocoa
class ViewController: NSViewController {
let layoutManager = NSLayoutManager()
let textStorage = NSTextStorage(attributedString: NSAttributedString(string: "This is a test"))
let textContainer1 = NSTextContainer()
let textContainer2 = NSTextContainer()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
textStorage.addLayoutManager(layoutManager)
textContainer1.widthTracksTextView = true
textContainer1.heightTracksTextView = true
textContainer2.widthTracksTextView = true
textContainer2.heightTracksTextView = true
let textView1 = NSTextView(frame: CGRectMake(0, 100, 100, 100), textContainer: textContainer1)
textView1.backgroundColor = NSColor.greenColor()
self.view.addSubview(textView1)
layoutManager.addTextContainer(textContainer1)
let textView2 = NSTextView(frame: CGRectMake(200, 100, 100, 100), textContainer: textContainer2)
textView2.backgroundColor = NSColor.greenColor()
self.view.addSubview(textView2)
layoutManager.addTextContainer(textContainer2)
}
}
这有效.
但是,当我尝试在iOS上使用UITextView进行相同操作时,UITextViews变得不可选择或不可编辑.查看我的iOS代码:
However, when I try to do the same on iOS with UITextView, the UITextViews become not selectable or editable. See my code for iOS:
import UIKit
class ViewController: UIViewController, UITextViewDelegate {
let layoutManager = NSLayoutManager()
let textStorage = NSTextStorage(attributedString: NSAttributedString(string: "This is a test. This text should spread over two UITextViews. Bla bla bla bla bla bla bla bla bla bla bla bla bla"))
let textContainer1 = NSTextContainer()
let textContainer2 = NSTextContainer()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
textStorage.addLayoutManager(layoutManager)
textContainer1.heightTracksTextView = true
textContainer1.widthTracksTextView = true
textContainer2.heightTracksTextView = true
textContainer2.widthTracksTextView = true
let textView1 = UITextView(frame: CGRectMake(0, 100, 100, 100), textContainer: textContainer1)
textView1.scrollEnabled = false
textView1.delegate = self
textView1.editable = true
textView1.selectable = true
textView1.backgroundColor = UIColor.greenColor()
self.view.addSubview(textView1)
layoutManager.addTextContainer(textContainer1)
let textView2 = UITextView(frame: CGRectMake(200, 100, 100, 100), textContainer: textContainer2)
textView2.scrollEnabled = false
textView2.delegate = self
textView2.editable = true
textView2.selectable = true
textView2.backgroundColor = UIColor.greenColor()
self.view.addSubview(textView2)
layoutManager.addTextContainer(textContainer2)
}
}
文本从一个UITextView流到另一个,但不可编辑.我将非常感谢您的任何建议.我搜索了这个问题,发现其他人也遇到了同样的问题,但是没有找到解决方法.
The text flows from one UITextView to the other, but it is not editable. I would be extremely thankful for any advice. I googled the issue and found other people experiencing the same problem, but found no solutions.
推荐答案
我也一直在寻找答案,似乎当UITextView与其他文本视图共享布局管理器时,该文本视图不幸地变成静态的.
I've been searching for an answer too, and it seems that when a UITextView shares a layout manager with other text views, the text view unfortunately becomes static.
iOS 7编程突破极限:第375页,开发适用于Apple的高级应用程序中概述了此问题:
这篇关于带有多个NSTextContainers的NSLayoutManager导致UITextViews不可选择/不可编辑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!