我正在尝试实现一种多页文本编辑布局,就像Pages、MS Word等软件中的布局。在OS X上,可以通过创建一个NSLayoutManager和一个NSTextStorage来为多个NSTextViews实现此功能。每个NSTextView都有自己的NSTextContainer。下面是OS X的示例代码。这里有一个简单的例子,可以让文本在两个NSTextViews之间传播:
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)
}
}
这个可以正常工作。
然而,在尝试在iOS上使用UITextView时,UITextViews变得不可选择或编辑。以下是我的iOS代码:
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)
}
}
文本会从一个UITextView流到另一个,但是它不可编辑。如果您有任何建议,我将非常感激。
我在谷歌上搜索了这个问题,并发现其他人也遇到了同样的问题,但没有找到解决方法。